home *** CD-ROM | disk | FTP | other *** search
open in:
MacOS 8.1
|
Win98
|
DOS
view JSON data
|
view as text
This file was processed as: DOS BACKUP file
(archive/dosBackupFile).
You can browse this item here: v6n6044a.txt
Confidence | Program | Detection | Match Type | Support
|
---|
100%
| dexvert
| DOS BACKUP file (archive/dosBackupFile)
| magic
| Supported |
1%
| dexvert
| Swift 3D 3D Graphic (poly/swift3D3DGraphic)
| ext
| Unsupported |
1%
| dexvert
| Boost Text serialization (other/boostTextSerialization)
| ext
| Unsupported |
1%
| dexvert
| Text File (text/txt)
| fallback
| Supported |
100%
| file
| DOS 2.0-3.2 backed up file \NLETTER\6.6\TRIANGLE.C
| default
| |
99%
| file
| data
| default
| |
51%
| TrID
| DOS 2.0-3.2 backup
| default
| |
48%
| TrID
| MP3 audio
| default (weak)
|
|
hex view+--------+-------------------------+-------------------------+--------+--------+
|00000000| ff 01 00 00 00 5c 4e 4c | 45 54 54 45 52 5c 36 2e |.....\NL|ETTER\6.|
|00000010| 36 5c 54 52 49 41 4e 47 | 4c 45 2e 43 00 00 00 00 |6\TRIANG|LE.C....|
|00000020| 00 00 00 00 00 00 00 00 | 00 00 00 00 00 00 00 00 |........|........|
|00000030| 00 00 00 00 00 00 00 00 | 00 00 00 00 00 00 00 00 |........|........|
|00000040| 00 00 00 00 00 00 00 00 | 00 00 00 00 00 00 00 00 |........|........|
|00000050| 00 00 00 18 00 00 00 00 | 00 00 00 00 00 00 00 00 |........|........|
|00000060| 00 00 00 00 00 00 00 00 | 00 00 00 00 00 00 00 00 |........|........|
|00000070| 00 00 00 00 00 00 00 00 | 00 00 00 00 00 00 00 00 |........|........|
|00000080| 2f 2a 0d 0a 43 6f 70 79 | 72 69 67 68 74 20 28 43 |/*..Copy|right (C|
|00000090| 29 20 4d 61 67 6e 61 20 | 43 61 72 74 61 20 53 6f |) Magna |Carta So|
|000000a0| 66 74 77 61 72 65 2c 20 | 31 39 38 38 2e 20 20 41 |ftware, |1988. A|
|000000b0| 6c 6c 20 52 69 67 68 74 | 73 20 52 65 73 65 72 76 |ll Right|s Reserv|
|000000c0| 65 64 2e 0d 0a 0d 0a 0d | 0a 53 63 72 6f 6c 6c 20 |ed......|.Scroll |
|000000d0| 61 6e 64 20 70 61 6e 20 | 61 20 67 72 61 70 68 69 |and pan |a graphi|
|000000e0| 63 73 20 69 6d 61 67 65 | 20 6f 6e 20 74 68 65 20 |cs image| on the |
|000000f0| 73 63 72 65 65 6e 20 69 | 6e 20 76 69 64 65 6f 20 |screen i|n video |
|00000100| 6d 6f 64 65 20 30 58 31 | 30 20 28 36 34 30 78 33 |mode 0X1|0 (640x3|
|00000110| 35 30 0d 0a 31 36 2d 63 | 6f 6c 6f 72 20 67 72 61 |50..16-c|olor gra|
|00000120| 70 68 69 63 73 29 2e 20 | 20 4e 6f 74 65 3a 20 54 |phics). | Note: T|
|00000130| 68 69 73 20 70 72 6f 67 | 72 61 6d 20 61 73 73 75 |his prog|ram assu|
|00000140| 6d 65 73 20 74 68 65 20 | 70 72 65 73 65 6e 63 65 |mes the |presence|
|00000150| 20 6f 66 20 61 6e 20 45 | 47 41 0d 0a 64 72 69 76 | of an E|GA..driv|
|00000160| 69 6e 67 20 61 6e 20 45 | 6e 68 61 6e 63 65 64 20 |ing an E|nhanced |
|00000170| 43 6f 6c 6f 72 20 44 69 | 73 70 6c 61 79 20 6f 72 |Color Di|splay or|
|00000180| 20 61 20 56 47 41 2e 20 | 20 46 75 72 74 68 65 72 | a VGA. | Further|
|00000190| 6d 6f 72 65 2c 20 74 68 | 61 74 20 74 68 69 73 20 |more, th|at this |
|000001a0| 61 64 61 70 74 65 72 0d | 0a 69 73 20 61 63 74 69 |adapter.|.is acti|
|000001b0| 76 65 2e 20 20 53 69 6d | 70 6c 65 20 69 6e 76 6f |ve. Sim|ple invo|
|000001c0| 63 61 74 61 69 6f 6e 20 | 73 79 6e 74 61 78 3a 0d |cataion |syntax:.|
|000001d0| 0a 54 55 52 42 4f 20 43 | 3a 20 20 20 20 20 20 20 |.TURBO C|: |
|000001e0| 20 74 63 63 20 73 67 72 | 61 70 68 0d 0a 4d 53 43 | tcc sgr|aph..MSC|
|000001f0| 20 76 35 2e 30 2b 3a 20 | 20 20 20 20 20 63 6c 20 | v5.0+: | cl |
|00000200| 2f 44 4d 53 43 20 73 67 | 72 61 70 68 2e 63 0d 0a |/DMSC sg|raph.c..|
|00000210| 50 4f 57 45 52 20 43 20 | 76 31 2e 31 2b 20 20 20 |POWER C |v1.1+ |
|00000220| 70 63 20 2f 65 20 73 67 | 72 61 70 68 0d 0a 57 41 |pc /e sg|raph..WA|
|00000230| 54 43 4f 4d 20 43 20 76 | 36 2e 30 2b 20 20 77 63 |TCOM C v|6.0+ wc|
|00000240| 63 20 73 67 72 61 70 68 | 20 2d 6d 73 0d 0a 20 20 |c sgraph| -ms.. |
|00000250| 20 20 20 20 20 20 20 20 | 20 20 20 20 20 20 77 6c | | wl|
|00000260| 69 6e 6b 20 46 49 4c 45 | 20 73 67 72 61 70 68 20 |ink FILE| sgraph |
|00000270| 4c 49 42 20 3f 3a 5c 77 | 61 74 63 6f 6d 63 5c 6c |LIB ?:\w|atcomc\l|
|00000280| 69 62 5c 63 6c 69 62 73 | 2c 20 3f 3a 5c 77 61 74 |ib\clibs|, ?:\wat|
|00000290| 63 6f 6d 63 5c 6c 69 62 | 5c 6d 61 74 68 73 0d 0a |comc\lib|\maths..|
|000002a0| 20 20 20 20 20 20 20 20 | 20 20 20 20 20 20 20 20 | | |
|000002b0| 4f 50 54 49 4f 4e 20 4d | 61 70 2c 20 63 61 73 65 |OPTION M|ap, case|
|000002c0| 65 78 61 63 74 2c 20 73 | 74 61 63 6b 3d 32 30 34 |exact, s|tack=204|
|000002d0| 38 0d 0a 46 69 72 73 74 | 20 76 65 72 73 69 6f 6e |8..First| version|
|000002e0| 3a 20 35 2f 37 2f 38 38 | 2e 20 20 4c 61 73 74 20 |: 5/7/88|. Last |
|000002f0| 72 65 76 69 73 65 64 3a | 20 36 2f 31 2f 38 38 2e |revised:| 6/1/88.|
|00000300| 0d 0a 2a 2f 0d 0a 0d 0a | 0d 0a 23 69 6e 63 6c 75 |..*/....|..#inclu|
|00000310| 64 65 20 3c 63 6f 6e 69 | 6f 2e 68 3e 0d 0a 23 69 |de <coni|o.h>..#i|
|00000320| 6e 63 6c 75 64 65 20 3c | 64 6f 73 2e 68 3e 0d 0a |nclude <|dos.h>..|
|00000330| 23 69 6e 63 6c 75 64 65 | 20 3c 73 74 64 69 6f 2e |#include| <stdio.|
|00000340| 68 3e 0d 0a 0d 0a 0d 0a | 74 79 70 65 64 65 66 20 |h>......|typedef |
|00000350| 75 6e 73 69 67 6e 65 64 | 20 63 68 61 72 20 42 59 |unsigned| char BY|
|00000360| 54 45 3b 0d 0a 0d 0a 2f | 2a 20 43 4f 4d 50 49 4c |TE;..../|* COMPIL|
|00000370| 45 52 20 53 50 45 43 49 | 46 49 43 20 44 45 54 41 |ER SPECI|FIC DETA|
|00000380| 49 4c 53 20 2a 2f 0d 0a | 23 69 66 20 64 65 66 69 |ILS */..|#if defi|
|00000390| 6e 65 64 28 4d 53 43 29 | 20 7c 7c 20 64 65 66 69 |ned(MSC)| || defi|
|000003a0| 6e 65 64 28 5f 5f 57 41 | 54 43 4f 4d 43 5f 5f 29 |ned(__WA|TCOMC__)|
|000003b0| 0d 0a 20 20 20 20 23 64 | 65 66 69 6e 65 20 69 6e |.. #d|efine in|
|000003c0| 70 6f 72 74 62 28 70 6f | 72 74 29 20 69 6e 70 28 |portb(po|rt) inp(|
|000003d0| 70 6f 72 74 29 0d 0a 20 | 20 20 20 23 64 65 66 69 |port).. | #defi|
|000003e0| 6e 65 20 6f 75 74 70 6f | 72 74 62 28 70 6f 72 74 |ne outpo|rtb(port|
|000003f0| 2c 76 61 6c 75 65 29 20 | 6f 75 74 70 28 28 70 6f |,value) |outp((po|
|00000400| 72 74 29 2c 28 76 61 6c | 75 65 29 29 0d 0a 20 20 |rt),(val|ue)).. |
|00000410| 20 20 23 64 65 66 69 6e | 65 20 6f 75 74 70 6f 72 | #defin|e outpor|
|00000420| 74 28 70 6f 72 74 2c 76 | 61 6c 75 65 29 20 6f 75 |t(port,v|alue) ou|
|00000430| 74 70 77 28 28 70 6f 72 | 74 29 2c 28 76 61 6c 75 |tpw((por|t),(valu|
|00000440| 65 29 29 0d 0a 23 65 6e | 64 69 66 0d 0a 0d 0a 2f |e))..#en|dif..../|
|00000450| 2a 20 4d 41 4e 49 46 45 | 53 54 20 43 4f 4e 53 54 |* MANIFE|ST CONST|
|00000460| 41 4e 54 53 20 2a 2f 0d | 0a 23 64 65 66 69 6e 65 |ANTS */.|.#define|
|00000470| 20 46 41 4c 53 45 20 20 | 20 20 20 20 20 20 20 20 | FALSE | |
|00000480| 20 30 0d 0a 23 64 65 66 | 69 6e 65 20 54 52 55 45 | 0..#def|ine TRUE|
|00000490| 20 20 20 20 20 20 20 20 | 20 20 20 20 21 46 41 4c | | !FAL|
|000004a0| 53 45 0d 0a 23 64 65 66 | 69 6e 65 20 4c 4f 47 49 |SE..#def|ine LOGI|
|000004b0| 43 41 4c 5f 57 49 44 54 | 48 20 20 20 31 33 32 20 |CAL_WIDT|H 132 |
|000004c0| 20 20 20 20 20 20 20 20 | 2f 2a 20 6c 6f 67 69 63 | |/* logic|
|000004d0| 61 6c 20 73 63 72 65 65 | 6e 20 77 69 64 74 68 20 |al scree|n width |
|000004e0| 69 6e 20 62 79 74 65 73 | 20 20 20 20 20 20 20 20 |in bytes| |
|000004f0| 2a 2f 0d 0a 23 64 65 66 | 69 6e 65 20 56 49 44 45 |*/..#def|ine VIDE|
|00000500| 4f 20 20 20 20 20 20 20 | 20 20 20 20 30 58 31 30 |O | 0X10|
|00000510| 20 20 20 20 20 20 20 20 | 2f 2a 20 42 49 4f 53 20 | |/* BIOS |
|00000520| 69 6e 74 65 72 72 75 70 | 74 20 30 58 31 30 20 2d |interrup|t 0X10 -|
|00000530| 2d 20 76 69 64 65 6f 20 | 20 20 20 20 20 20 20 20 |- video | |
|00000540| 2a 2f 0d 0a 23 64 65 66 | 69 6e 65 20 59 45 4c 4c |*/..#def|ine YELL|
|00000550| 4f 57 20 20 20 20 20 20 | 20 20 20 20 31 34 20 20 |OW | 14 |
|00000560| 20 20 20 20 20 20 20 20 | 2f 2a 20 74 68 65 20 63 | |/* the c|
|00000570| 6f 6c 6f 72 20 66 6f 72 | 20 74 68 65 20 67 72 61 |olor for| the gra|
|00000580| 70 68 69 63 73 20 69 6d | 61 67 65 20 20 20 20 20 |phics im|age |
|00000590| 2a 2f 0d 0a 0d 0a 2f 2a | 20 45 47 41 20 61 6e 64 |*/..../*| EGA and|
|000005a0| 20 56 47 41 20 72 65 67 | 69 73 74 65 72 20 76 61 | VGA reg|ister va|
|000005b0| 6c 75 65 73 20 2a 2f 0d | 0a 23 64 65 66 69 6e 65 |lues */.|.#define|
|000005c0| 20 53 54 41 52 54 5f 41 | 44 44 52 45 53 53 5f 48 | START_A|DDRESS_H|
|000005d0| 49 47 48 20 20 30 58 30 | 43 20 20 2f 2a 20 41 64 |IGH 0X0|C /* Ad|
|000005e0| 64 72 65 73 73 20 6f 66 | 20 73 74 61 72 74 20 61 |dress of| start a|
|000005f0| 64 64 72 65 73 73 20 68 | 20 72 65 67 2e 20 6f 66 |ddress h| reg. of|
|00000600| 20 43 52 54 43 20 2a 2f | 0d 0a 23 64 65 66 69 6e | CRTC */|..#defin|
|00000610| 65 20 53 54 41 52 54 5f | 41 44 44 52 45 53 53 5f |e START_|ADDRESS_|
|00000620| 4c 4f 57 20 20 20 30 58 | 30 44 20 20 2f 2a 20 41 |LOW 0X|0D /* A|
|00000630| 64 64 72 65 73 73 20 6f | 66 20 73 74 61 72 74 20 |ddress o|f start |
|00000640| 61 64 64 72 65 73 73 20 | 6c 20 72 65 67 2e 20 6f |address |l reg. o|
|00000650| 66 20 43 52 54 43 20 2a | 2f 0d 0a 23 64 65 66 69 |f CRTC *|/..#defi|
|00000660| 6e 65 20 41 43 5f 49 4e | 44 45 58 20 20 20 20 20 |ne AC_IN|DEX |
|00000670| 20 20 20 20 20 20 20 30 | 58 33 43 30 20 2f 2a 20 | 0|X3C0 /* |
|00000680| 41 74 74 72 69 62 75 74 | 65 20 43 6f 6e 74 72 6f |Attribut|e Contro|
|00000690| 6c 6c 65 72 20 49 6e 64 | 65 78 20 52 65 67 69 73 |ller Ind|ex Regis|
|000006a0| 74 65 72 20 20 20 20 20 | 2a 2f 0d 0a 23 64 65 66 |ter |*/..#def|
|000006b0| 69 6e 65 20 41 43 5f 48 | 50 50 20 20 20 20 20 20 |ine AC_H|PP |
|000006c0| 20 20 20 20 20 20 20 20 | 30 58 31 33 20 7c 20 30 | |0X13 | 0|
|000006d0| 58 32 30 20 2f 2a 20 48 | 6f 72 69 7a 6f 6e 74 61 |X20 /* H|orizonta|
|000006e0| 6c 20 50 65 6c 20 50 61 | 6e 6e 69 6e 67 20 52 65 |l Pel Pa|nning Re|
|000006f0| 67 69 73 74 65 72 20 20 | 20 2a 2f 0d 0a 20 20 20 |gister | */.. |
|00000700| 20 20 20 20 20 20 20 20 | 20 20 20 20 20 20 20 20 | | |
|00000710| 20 20 20 20 20 20 20 20 | 20 20 20 20 20 20 20 20 | | |
|00000720| 20 20 20 20 20 2f 2a 20 | 4e 6f 74 65 3a 20 4f 52 | /* |Note: OR|
|00000730| 65 64 20 77 69 74 68 20 | 32 30 48 20 74 6f 20 70 |ed with |20H to p|
|00000740| 72 65 73 65 72 76 65 20 | 20 20 2a 2f 0d 0a 20 20 |reserve | */.. |
|00000750| 20 20 20 20 20 20 20 20 | 20 20 20 20 20 20 20 20 | | |
|00000760| 20 20 20 20 20 20 20 20 | 20 20 20 20 20 20 20 20 | | |
|00000770| 20 20 20 20 20 20 2f 2a | 20 62 69 74 20 35 20 20 | /*| bit 5 |
|00000780| 20 20 20 20 20 20 20 20 | 20 20 20 20 20 20 20 20 | | |
|00000790| 20 20 20 20 20 20 20 20 | 20 20 20 2a 2f 0d 0a 23 | | */..#|
|000007a0| 64 65 66 69 6e 65 20 4f | 46 46 53 45 54 5f 52 45 |define O|FFSET_RE|
|000007b0| 47 09 09 09 30 58 30 31 | 33 0d 0a 0d 0a 2f 2a 20 |G...0X01|3..../* |
|000007c0| 47 4c 4f 42 41 4c 20 56 | 41 52 49 41 42 4c 45 53 |GLOBAL V|ARIABLES|
|000007d0| 20 2a 2f 0d 0a 75 6e 73 | 69 67 6e 65 64 20 72 69 | */..uns|igned ri|
|000007e0| 67 68 74 5f 65 64 67 65 | 2c 20 6c 65 66 74 5f 65 |ght_edge|, left_e|
|000007f0| 64 67 65 3b 20 2f 2a 20 | 54 52 55 45 20 69 66 20 |dge; /* |TRUE if |
|00000800| 77 65 20 61 72 65 20 61 | 74 20 74 68 65 20 65 64 |we are a|t the ed|
|00000810| 67 65 20 6f 66 20 74 68 | 65 20 73 63 72 65 65 6e |ge of th|e screen|
|00000820| 20 2a 2f 0d 0a 69 6e 74 | 20 76 70 65 6c 2c 20 68 | */..int| vpel, h|
|00000830| 70 65 6c 3b 0d 0a 69 6e | 74 20 6d 6f 6e 6f 20 3d |pel;..in|t mono =|
|00000840| 20 46 41 4c 53 45 3b 20 | 20 20 20 20 20 20 20 20 | FALSE; | |
|00000850| 20 20 20 20 20 20 2f 2a | 20 45 47 41 20 6d 6f 6e | /*| EGA mon|
|00000860| 6f 63 68 72 6f 6d 65 20 | 2a 2f 0d 0a 0d 0a 0d 0a |ochrome |*/......|
|00000870| 73 74 72 75 63 74 20 76 | 69 64 65 6f 5f 64 65 73 |struct v|ideo_des|
|00000880| 63 72 69 70 74 6f 72 20 | 7b 0d 0a 20 20 20 20 42 |criptor |{.. B|
|00000890| 59 54 45 20 66 61 72 20 | 2a 62 61 73 65 3b 20 20 |YTE far |*base; |
|000008a0| 20 20 20 20 20 20 20 20 | 20 20 20 2f 2a 20 73 74 | | /* st|
|000008b0| 61 72 74 69 6e 67 20 61 | 64 64 72 65 73 73 20 6f |arting a|ddress o|
|000008c0| 66 20 74 68 65 20 76 69 | 64 65 6f 20 62 75 66 66 |f the vi|deo buff|
|000008d0| 65 72 20 20 20 20 20 2a | 2f 0d 0a 20 20 20 20 75 |er *|/.. u|
|000008e0| 6e 73 69 67 6e 65 64 20 | 69 73 72 3b 20 20 20 20 |nsigned |isr; |
|000008f0| 20 20 20 20 20 20 20 20 | 20 20 20 2f 2a 20 45 47 | | /* EG|
|00000900| 41 2f 56 47 41 20 69 6e | 70 75 74 20 73 74 61 74 |A/VGA in|put stat|
|00000910| 75 73 20 72 65 67 69 73 | 74 65 72 20 61 64 64 72 |us regis|ter addr|
|00000920| 65 73 73 20 20 20 20 2a | 2f 0d 0a 20 20 20 20 75 |ess *|/.. u|
|00000930| 6e 73 69 67 6e 65 64 20 | 63 72 74 63 3b 20 20 20 |nsigned |crtc; |
|00000940| 20 20 20 20 20 20 20 20 | 20 20 20 2f 2a 20 43 52 | | /* CR|
|00000950| 54 20 43 6f 6e 74 72 6f | 6c 6c 65 72 20 52 65 67 |T Contro|ller Reg|
|00000960| 69 73 74 65 72 20 61 64 | 64 72 65 73 73 20 20 20 |ister ad|dress |
|00000970| 20 20 20 20 20 20 20 2a | 2f 0d 0a 7d 3b 0d 0a 0d | *|/..};...|
|00000980| 0a 0d 0a 73 74 72 75 63 | 74 20 73 63 72 65 65 6e |...struc|t screen|
|00000990| 5f 64 65 73 63 72 69 70 | 74 6f 72 20 7b 0d 0a 20 |_descrip|tor {.. |
|000009a0| 20 20 20 75 6e 73 69 67 | 6e 65 64 20 72 6f 77 73 | unsig|ned rows|
|000009b0| 3b 0d 0a 20 20 20 20 75 | 6e 73 69 67 6e 65 64 20 |;.. u|nsigned |
|000009c0| 63 6f 6c 73 3b 0d 0a 20 | 20 20 20 75 6e 73 69 67 |cols;.. | unsig|
|000009d0| 6e 65 64 20 6c 6f 67 69 | 63 61 6c 5f 77 69 64 74 |ned logi|cal_widt|
|000009e0| 68 3b 20 20 20 20 20 2f | 2a 20 73 63 72 65 65 6e |h; /|* screen|
|000009f0| 20 6c 6f 67 69 63 61 6c | 20 77 69 64 74 68 20 69 | logical| width i|
|00000a00| 6e 20 77 6f 72 64 73 2e | 20 6d 61 78 3a 20 30 58 |n words.| max: 0X|
|00000a10| 31 30 30 20 2a 2f 0d 0a | 20 20 20 20 75 6e 73 69 |100 */..| unsi|
|00000a20| 67 6e 65 64 20 73 74 61 | 72 74 5f 61 64 64 72 3b |gned sta|rt_addr;|
|00000a30| 20 20 20 20 20 20 20 20 | 2f 2a 20 73 63 72 65 65 | |/* scree|
|00000a40| 6e 20 73 74 61 72 74 20 | 61 64 64 72 65 73 73 2e |n start |address.|
|00000a50| 20 6d 61 78 3a 20 30 58 | 34 30 30 30 20 20 20 20 | max: 0X|4000 |
|00000a60| 20 20 20 20 20 2a 2f 0d | 0a 7d 3b 0d 0a 0d 0a 0d | */.|.};.....|
|00000a70| 0a 73 74 72 75 63 74 20 | 76 69 64 65 6f 5f 64 65 |.struct |video_de|
|00000a80| 73 63 72 69 70 74 6f 72 | 20 76 69 64 65 6f 3b 0d |scriptor| video;.|
|00000a90| 0a 73 74 72 75 63 74 20 | 73 63 72 65 65 6e 5f 64 |.struct |screen_d|
|00000aa0| 65 73 63 72 69 70 74 6f | 72 20 73 63 72 65 65 6e |escripto|r screen|
|00000ab0| 3b 0d 0a 0d 0a 2f 2a 20 | 46 55 4e 43 54 49 4f 4e |;..../* |FUNCTION|
|00000ac0| 20 50 52 4f 54 4f 54 59 | 50 45 53 20 2a 2f 0d 0a | PROTOTY|PES */..|
|00000ad0| 69 6e 74 20 66 69 6c 6c | 5f 74 72 69 61 67 28 69 |int fill|_triag(i|
|00000ae0| 6e 74 20 63 6f 6c 6f 72 | 2c 20 69 6e 74 20 76 5b |nt color|, int v[|
|00000af0| 5d 5b 32 5d 29 3b 0d 0a | 76 6f 69 64 20 73 63 61 |][2]);..|void sca|
|00000b00| 6e 6c 69 6e 65 28 75 6e | 73 69 67 6e 65 64 20 78 |nline(un|signed x|
|00000b10| 30 2c 20 75 6e 73 69 67 | 6e 65 64 20 78 31 2c 20 |0, unsig|ned x1, |
|00000b20| 75 6e 73 69 67 6e 65 64 | 20 79 2c 20 69 6e 74 20 |unsigned| y, int |
|00000b30| 63 6f 6c 6f 72 29 3b 0d | 0a 75 6e 73 69 67 6e 65 |color);.|.unsigne|
|00000b40| 64 20 73 6d 6f 6f 74 68 | 5f 73 63 72 6f 6c 6c 28 |d smooth|_scroll(|
|00000b50| 69 6e 74 20 63 6f 75 6e | 74 2c 20 75 6e 73 69 67 |int coun|t, unsig|
|00000b60| 6e 65 64 20 73 70 65 65 | 64 29 3b 0d 0a 75 6e 73 |ned spee|d);..uns|
|00000b70| 69 67 6e 65 64 20 73 6d | 6f 6f 74 68 5f 70 61 6e |igned sm|ooth_pan|
|00000b80| 28 69 6e 74 20 63 6f 75 | 6e 74 2c 20 75 6e 73 69 |(int cou|nt, unsi|
|00000b90| 67 6e 65 64 20 73 70 65 | 65 64 29 3b 0d 0a 75 6e |gned spe|ed);..un|
|00000ba0| 73 69 67 6e 65 64 20 73 | 65 74 5f 6c 6f 67 69 63 |signed s|et_logic|
|00000bb0| 61 6c 5f 73 63 72 65 65 | 6e 5f 77 69 64 74 68 28 |al_scree|n_width(|
|00000bc0| 75 6e 73 69 67 6e 65 64 | 20 6c 5f 77 69 64 74 68 |unsigned| l_width|
|00000bd0| 29 3b 0d 0a 76 6f 69 64 | 20 73 65 74 5f 73 74 61 |);..void| set_sta|
|00000be0| 72 74 5f 61 64 64 72 28 | 75 6e 73 69 67 6e 65 64 |rt_addr(|unsigned|
|00000bf0| 20 73 74 61 72 74 5f 61 | 64 64 72 29 3b 0d 0a 76 | start_a|ddr);..v|
|00000c00| 6f 69 64 20 73 65 74 5f | 70 65 6c 5f 70 61 6e 28 |oid set_|pel_pan(|
|00000c10| 69 6e 74 20 68 70 65 6c | 29 3b 0d 0a 0d 0a 0d 0a |int hpel|);......|
|00000c20| 76 6f 69 64 20 6d 61 69 | 6e 28 76 6f 69 64 29 0d |void mai|n(void).|
|00000c30| 0a 7b 0d 0a 20 20 20 20 | 75 6e 69 6f 6e 20 52 45 |.{.. |union RE|
|00000c40| 47 53 20 72 65 67 73 3b | 0d 0a 20 20 20 20 20 20 |GS regs;|.. |
|00000c50| 20 20 20 20 20 20 20 20 | 20 20 20 20 20 20 20 20 | | |
|00000c60| 20 20 2f 2a 20 74 6f 70 | 20 2d 2d 2d 2d 2d 20 6c | /* top| ----- l|
|00000c70| 65 66 74 20 63 6f 72 6e | 65 72 20 2d 20 72 69 67 |eft corn|er - rig|
|00000c80| 68 74 20 63 6f 72 6e 65 | 72 20 2a 2f 0d 0a 20 20 |ht corne|r */.. |
|00000c90| 20 20 73 74 61 74 69 63 | 20 69 6e 74 20 76 31 5b | static| int v1[|
|00000ca0| 5d 5b 32 5d 20 3d 20 7b | 7b 31 30 30 2c 20 32 35 |][2] = {|{100, 25|
|00000cb0| 7d 2c 20 7b 35 30 2c 20 | 31 32 35 7d 2c 20 7b 31 |}, {50, |125}, {1|
|00000cc0| 35 30 2c 20 31 32 35 7d | 7d 3b 0d 0a 0d 0a 20 20 |50, 125}|};.... |
|00000cd0| 20 20 2f 2a 20 45 53 54 | 41 42 4c 49 53 48 20 54 | /* EST|ABLISH T|
|00000ce0| 48 45 20 53 59 53 54 45 | 4d 20 53 54 41 54 55 53 |HE SYSTE|M STATUS|
|00000cf0| 20 2a 2f 0d 0a 0d 0a 20 | 20 20 20 2f 2a 20 69 6e | */.... | /* in|
|00000d00| 69 74 69 61 6c 69 7a 65 | 20 74 68 65 20 62 61 73 |itialize| the bas|
|00000d10| 65 20 61 64 64 72 65 73 | 73 20 6f 66 20 74 68 65 |e addres|s of the|
|00000d20| 20 76 69 64 65 6f 20 62 | 75 66 66 65 72 20 2a 2f | video b|uffer */|
|00000d30| 0d 0a 20 20 20 20 76 69 | 64 65 6f 2e 62 61 73 65 |.. vi|deo.base|
|00000d40| 20 20 20 20 20 20 20 20 | 20 20 3d 20 28 42 59 54 | | = (BYT|
|00000d50| 45 20 66 61 72 20 2a 29 | 20 30 58 41 30 30 30 30 |E far *)| 0XA0000|
|00000d60| 30 30 30 4c 3b 0d 0a 20 | 20 20 20 73 63 72 65 65 |000L;.. | scree|
|00000d70| 6e 2e 73 74 61 72 74 5f | 61 64 64 72 20 20 20 3d |n.start_|addr =|
|00000d80| 20 30 3b 20 20 20 20 20 | 20 20 20 20 20 20 20 2f | 0; | /|
|00000d90| 2a 20 69 6e 69 74 69 61 | 6c 69 7a 65 20 74 68 65 |* initia|lize the|
|00000da0| 20 73 74 61 72 74 20 61 | 64 64 72 65 73 73 20 2a | start a|ddress *|
|00000db0| 2f 0d 0a 0d 0a 20 20 20 | 20 72 65 67 73 2e 78 2e |/.... | regs.x.|
|00000dc0| 61 78 20 3d 20 30 58 30 | 30 31 30 3b 20 20 20 20 |ax = 0X0|010; |
|00000dd0| 20 20 20 20 20 20 20 20 | 20 20 20 20 20 2f 2a 20 | | /* |
|00000de0| 73 65 74 20 76 69 64 65 | 6f 20 6d 6f 64 65 20 74 |set vide|o mode t|
|00000df0| 6f 20 31 30 20 68 65 78 | 2e 20 2a 2f 0d 0a 20 20 |o 10 hex|. */.. |
|00000e00| 20 20 69 6e 74 38 36 28 | 30 58 31 30 2c 20 26 72 | int86(|0X10, &r|
|00000e10| 65 67 73 2c 20 26 72 65 | 67 73 29 3b 0d 0a 0d 0a |egs, &re|gs);....|
|00000e20| 20 20 20 20 2f 2a 20 69 | 6e 69 74 69 61 6c 69 7a | /* i|nitializ|
|00000e30| 65 20 74 68 65 20 6c 6f | 67 69 63 61 6c 20 73 63 |e the lo|gical sc|
|00000e40| 72 65 65 6e 20 77 69 64 | 74 68 20 69 6e 20 62 79 |reen wid|th in by|
|00000e50| 74 65 73 20 2a 2f 0d 0a | 20 20 20 20 73 63 72 65 |tes */..| scre|
|00000e60| 65 6e 2e 6c 6f 67 69 63 | 61 6c 5f 77 69 64 74 68 |en.logic|al_width|
|00000e70| 20 3d 20 4c 4f 47 49 43 | 41 4c 5f 57 49 44 54 48 | = LOGIC|AL_WIDTH|
|00000e80| 3b 0d 0a 20 20 20 20 73 | 63 72 65 65 6e 2e 63 6f |;.. s|creen.co|
|00000e90| 6c 73 20 3d 20 73 63 72 | 65 65 6e 2e 6c 6f 67 69 |ls = scr|een.logi|
|00000ea0| 63 61 6c 5f 77 69 64 74 | 68 3b 0d 0a 0d 0a 20 20 |cal_widt|h;.... |
|00000eb0| 20 20 76 69 64 65 6f 2e | 69 73 72 20 20 20 3d 20 | video.|isr = |
|00000ec0| 30 58 30 33 64 61 3b 20 | 20 20 20 20 20 20 20 20 |0X03da; | |
|00000ed0| 20 20 2f 2a 20 61 64 64 | 72 65 73 73 20 6f 66 20 | /* add|ress of |
|00000ee0| 69 6e 70 75 74 20 73 74 | 61 74 75 73 20 72 65 67 |input st|atus reg|
|00000ef0| 69 73 74 65 72 20 20 20 | 20 20 2a 2f 0d 0a 20 20 |ister | */.. |
|00000f00| 20 20 76 69 64 65 6f 2e | 63 72 74 63 20 20 3d 20 | video.|crtc = |
|00000f10| 76 69 64 65 6f 2e 69 73 | 72 20 2d 20 36 3b 20 20 |video.is|r - 6; |
|00000f20| 20 20 2f 2a 20 61 64 64 | 72 65 73 73 20 6f 66 20 | /* add|ress of |
|00000f30| 43 52 54 20 63 6f 6e 74 | 72 6f 6c 6c 65 72 20 72 |CRT cont|roller r|
|00000f40| 65 67 69 73 74 65 72 20 | 20 20 2a 2f 0d 0a 0d 0a |egister | */....|
|00000f50| 20 20 20 20 2f 2a 20 53 | 45 54 20 54 48 45 20 4c | /* S|ET THE L|
|00000f60| 4f 47 49 43 41 4c 20 53 | 43 52 45 45 4e 20 57 49 |OGICAL S|CREEN WI|
|00000f70| 44 54 48 20 46 4f 52 20 | 50 41 4e 4e 49 4e 47 20 |DTH FOR |PANNING |
|00000f80| 41 4e 44 20 54 48 45 20 | 53 54 41 52 54 20 41 44 |AND THE |START AD|
|00000f90| 44 52 45 53 53 20 2a 2f | 0d 0a 20 20 20 20 73 65 |DRESS */|.. se|
|00000fa0| 74 5f 6c 6f 67 69 63 61 | 6c 5f 73 63 72 65 65 6e |t_logica|l_screen|
|00000fb0| 5f 77 69 64 74 68 28 73 | 63 72 65 65 6e 2e 6c 6f |_width(s|creen.lo|
|00000fc0| 67 69 63 61 6c 5f 77 69 | 64 74 68 29 3b 0d 0a 20 |gical_wi|dth);.. |
|00000fd0| 20 20 20 73 65 74 5f 73 | 74 61 72 74 5f 61 64 64 | set_s|tart_add|
|00000fe0| 72 28 73 63 72 65 65 6e | 2e 73 74 61 72 74 5f 61 |r(screen|.start_a|
|00000ff0| 64 64 72 29 3b 0d 0a 0d | 0a 20 20 20 20 2f 2a 20 |ddr);...|. /* |
|00001000| 57 45 20 4d 55 53 54 20 | 44 4f 20 41 20 44 55 4d |WE MUST |DO A DUM|
|00001010| 4d 59 20 52 45 41 44 20 | 4f 46 20 54 48 45 20 49 |MY READ |OF THE I|
|00001020| 4e 50 55 54 20 53 54 41 | 54 55 53 20 52 45 47 49 |NPUT STA|TUS REGI|
|00001030| 53 54 45 52 20 54 4f 20 | 49 4e 49 54 49 41 4c 49 |STER TO |INITIALI|
|00001040| 5a 45 0d 0a 20 20 20 20 | 54 48 45 20 54 4f 47 47 |ZE.. |THE TOGG|
|00001050| 4c 45 20 4f 46 20 54 48 | 45 20 41 54 54 52 49 42 |LE OF TH|E ATTRIB|
|00001060| 55 54 45 20 43 4f 4e 54 | 52 4f 4c 4c 45 52 20 28 |UTE CONT|ROLLER (|
|00001070| 73 65 65 20 74 65 78 74 | 20 6f 66 20 61 72 74 69 |see text| of arti|
|00001080| 63 6c 65 20 29 20 20 20 | 20 20 20 20 20 20 20 20 |cle ) | |
|00001090| 2a 2f 0d 0a 20 20 20 20 | 69 6e 70 6f 72 74 62 28 |*/.. |inportb(|
|000010a0| 76 69 64 65 6f 2e 69 73 | 72 29 3b 0d 0a 0d 0a 20 |video.is|r);.... |
|000010b0| 20 20 20 66 69 6c 6c 5f | 74 72 69 61 67 28 59 45 | fill_|triag(YE|
|000010c0| 4c 4c 4f 57 2c 20 76 31 | 29 3b 20 2f 2a 20 64 72 |LLOW, v1|); /* dr|
|000010d0| 61 77 20 74 68 65 20 67 | 72 61 70 68 69 63 20 69 |aw the g|raphic i|
|000010e0| 6d 61 67 65 20 6f 6e 20 | 74 68 65 20 73 63 72 65 |mage on |the scre|
|000010f0| 65 6e 20 20 20 20 20 20 | 20 20 20 20 20 20 20 2a |en | *|
|00001100| 2f 0d 0a 0d 0a 20 20 20 | 20 2f 2a 20 41 4c 4c 20 |/.... | /* ALL |
|00001110| 54 48 45 20 53 43 52 4f | 4c 4c 49 4e 47 2d 50 41 |THE SCRO|LLING-PA|
|00001120| 4e 4e 49 4e 47 20 41 43 | 54 49 4f 4e 20 49 53 20 |NNING AC|TION IS |
|00001130| 48 41 4e 44 4c 45 44 20 | 48 45 52 45 20 2a 2f 0d |HANDLED |HERE */.|
|00001140| 0a 20 20 20 20 64 6f 20 | 7b 0d 0a 20 20 20 20 20 |. do |{.. |
|00001150| 20 20 20 73 6d 6f 6f 74 | 68 5f 73 63 72 6f 6c 6c | smoot|h_scroll|
|00001160| 28 2d 31 30 30 2c 32 29 | 3b 0d 0a 20 20 20 20 20 |(-100,2)|;.. |
|00001170| 20 20 20 73 6d 6f 6f 74 | 68 5f 70 61 6e 28 2d 33 | smoot|h_pan(-3|
|00001180| 30 30 2c 31 29 3b 0d 0a | 20 20 20 20 20 20 20 20 |00,1);..| |
|00001190| 73 6d 6f 6f 74 68 5f 73 | 63 72 6f 6c 6c 28 31 30 |smooth_s|croll(10|
|000011a0| 30 2c 32 29 3b 0d 0a 20 | 20 20 20 20 20 20 20 73 |0,2);.. | s|
|000011b0| 6d 6f 6f 74 68 5f 70 61 | 6e 28 33 30 30 2c 31 29 |mooth_pa|n(300,1)|
|000011c0| 3b 0d 0a 20 20 20 20 7d | 20 77 68 69 6c 65 20 28 |;.. }| while (|
|000011d0| 21 6b 62 68 69 74 28 29 | 29 3b 0d 0a 0d 0a 20 20 |!kbhit()|);.... |
|000011e0| 20 20 2f 2a 20 41 20 4b | 45 59 20 57 41 53 20 48 | /* A K|EY WAS H|
|000011f0| 49 54 20 2d 2d 20 52 45 | 54 55 52 4e 20 54 4f 20 |IT -- RE|TURN TO |
|00001200| 38 30 20 43 4f 4c 55 4d | 4e 20 43 4f 4c 4f 52 20 |80 COLUM|N COLOR |
|00001210| 54 45 58 54 20 4d 4f 44 | 45 20 41 4e 44 20 45 58 |TEXT MOD|E AND EX|
|00001220| 49 54 20 2a 2f 0d 0a 20 | 20 20 20 67 65 74 63 68 |IT */.. | getch|
|00001230| 28 29 3b 0d 0a 20 20 20 | 20 72 65 67 73 2e 78 2e |();.. | regs.x.|
|00001240| 61 78 20 3d 20 30 58 30 | 30 30 33 3b 0d 0a 20 20 |ax = 0X0|003;.. |
|00001250| 20 20 69 6e 74 38 36 28 | 30 58 31 30 2c 20 26 72 | int86(|0X10, &r|
|00001260| 65 67 73 2c 20 26 72 65 | 67 73 29 3b 0d 0a 7d 0d |egs, &re|gs);..}.|
|00001270| 0a 0d 0a 0d 0a 2f 2a 20 | 46 69 6c 6c 20 61 6e 20 |...../* |Fill an |
|00001280| 69 73 6f 73 63 65 6c 65 | 73 20 74 72 69 61 6e 67 |isoscele|s triang|
|00001290| 6c 65 20 77 69 74 68 20 | 6f 6e 65 20 73 69 64 65 |le with |one side|
|000012a0| 20 63 6f 6e 74 69 67 75 | 6f 75 73 20 77 69 74 68 | contigu|ous with|
|000012b0| 20 61 20 73 63 61 6e 20 | 6c 69 6e 65 20 61 6e 64 | a scan |line and|
|000012c0| 0d 0a 61 6e 20 61 70 65 | 78 20 61 74 20 74 68 65 |..an ape|x at the|
|000012d0| 20 74 6f 70 2e 0d 0a 2a | 2f 0d 0a 0d 0a 69 6e 74 | top...*|/....int|
|000012e0| 20 66 69 6c 6c 5f 74 72 | 69 61 67 28 69 6e 74 20 | fill_tr|iag(int |
|000012f0| 63 6f 6c 6f 72 2c 20 69 | 6e 74 20 76 5b 5d 5b 32 |color, i|nt v[][2|
|00001300| 5d 29 0d 0a 7b 0d 0a 20 | 20 20 20 69 6e 74 20 79 |])..{.. | int y|
|00001310| 2c 20 73 74 61 72 74 2c | 20 65 6e 64 3b 0d 0a 20 |, start,| end;.. |
|00001320| 20 20 20 64 6f 75 62 6c | 65 20 6c 65 66 74 5f 73 | doubl|e left_s|
|00001330| 6c 6f 70 65 2c 20 72 69 | 67 68 74 5f 73 6c 6f 70 |lope, ri|ght_slop|
|00001340| 65 2c 20 78 30 2c 20 78 | 31 2c 20 78 32 2c 20 79 |e, x0, x|1, x2, y|
|00001350| 30 2c 20 79 31 2c 20 79 | 32 3b 0d 0a 0d 0a 20 20 |0, y1, y|2;.... |
|00001360| 20 20 78 30 20 3d 20 76 | 5b 30 5d 5b 30 5d 3b 0d | x0 = v|[0][0];.|
|00001370| 0a 20 20 20 20 78 31 20 | 3d 20 76 5b 31 5d 5b 30 |. x1 |= v[1][0|
|00001380| 5d 3b 0d 0a 20 20 20 20 | 78 32 20 3d 20 76 5b 32 |];.. |x2 = v[2|
|00001390| 5d 5b 30 5d 3b 0d 0a 20 | 20 20 20 79 30 20 3d 20 |][0];.. | y0 = |
|000013a0| 76 5b 30 5d 5b 31 5d 3b | 0d 0a 20 20 20 20 79 31 |v[0][1];|.. y1|
|000013b0| 20 3d 20 76 5b 31 5d 5b | 31 5d 3b 0d 0a 20 20 20 | = v[1][|1];.. |
|000013c0| 20 79 32 20 3d 20 76 5b | 32 5d 5b 31 5d 3b 0d 0a | y2 = v[|2][1];..|
|000013d0| 0d 0a 20 20 20 20 6c 65 | 66 74 5f 73 6c 6f 70 65 |.. le|ft_slope|
|000013e0| 20 20 3d 20 28 78 31 20 | 2d 20 78 30 29 2f 28 79 | = (x1 |- x0)/(y|
|000013f0| 31 20 2d 20 79 30 29 3b | 20 20 20 20 20 20 2f 2a |1 - y0);| /*|
|00001400| 20 43 6f 6d 70 75 74 65 | 20 73 6c 6f 70 65 73 20 | Compute| slopes |
|00001410| 20 20 20 20 20 20 20 20 | 20 20 2a 2f 0d 0a 20 20 | | */.. |
|00001420| 20 20 72 69 67 68 74 5f | 73 6c 6f 70 65 20 3d 20 | right_|slope = |
|00001430| 28 78 32 20 2d 20 78 30 | 29 2f 28 79 32 20 2d 20 |(x2 - x0|)/(y2 - |
|00001440| 79 30 29 3b 20 20 20 20 | 20 20 2f 2a 20 43 6f 6d |y0); | /* Com|
|00001450| 70 75 74 65 20 73 6c 6f | 70 65 73 20 20 20 20 20 |pute slo|pes |
|00001460| 20 20 20 20 20 20 2a 2f | 0d 0a 20 20 20 20 66 6f | */|.. fo|
|00001470| 72 20 28 79 20 3d 20 79 | 30 3b 20 79 20 3c 3d 20 |r (y = y|0; y <= |
|00001480| 79 31 3b 20 79 2b 2b 29 | 20 7b 20 20 20 20 20 20 |y1; y++)| { |
|00001490| 20 20 2f 2a 20 4c 6f 6f | 70 20 6f 76 65 72 20 72 | /* Loo|p over r|
|000014a0| 61 73 74 65 72 20 6c 69 | 6e 65 73 20 20 20 2a 2f |aster li|nes */|
|000014b0| 0d 0a 20 20 20 20 20 20 | 20 20 73 74 61 72 74 20 |.. | start |
|000014c0| 3d 20 78 30 20 2b 20 28 | 79 20 2d 20 79 30 29 2a |= x0 + (|y - y0)*|
|000014d0| 6c 65 66 74 5f 73 6c 6f | 70 65 3b 0d 0a 20 20 20 |left_slo|pe;.. |
|000014e0| 20 20 20 20 20 65 6e 64 | 20 20 20 3d 20 78 30 20 | end| = x0 |
|000014f0| 2b 20 28 79 20 2d 20 79 | 30 29 2a 72 69 67 68 74 |+ (y - y|0)*right|
|00001500| 5f 73 6c 6f 70 65 3b 0d | 0a 20 20 20 20 20 20 20 |_slope;.|. |
|00001510| 20 73 63 61 6e 6c 69 6e | 65 28 73 74 61 72 74 2c | scanlin|e(start,|
|00001520| 65 6e 64 2c 79 2c 63 6f | 6c 6f 72 29 3b 20 20 20 |end,y,co|lor); |
|00001530| 20 2f 2a 20 46 69 6c 6c | 20 6e 65 78 74 20 73 65 | /* Fill| next se|
|00001540| 63 74 69 6f 6e 20 20 20 | 20 2a 2f 0d 0a 20 20 20 |ction | */.. |
|00001550| 20 7d 0d 0a 0d 0a 20 20 | 20 20 72 65 74 75 72 6e | }.... | return|
|00001560| 20 28 30 29 3b 0d 0a 7d | 0d 0a 0d 0a 0d 0a 76 6f | (0);..}|......vo|
|00001570| 69 64 20 73 63 61 6e 6c | 69 6e 65 28 75 6e 73 69 |id scanl|ine(unsi|
|00001580| 67 6e 65 64 20 73 74 61 | 72 74 2c 20 75 6e 73 69 |gned sta|rt, unsi|
|00001590| 67 6e 65 64 20 73 74 6f | 70 2c 20 75 6e 73 69 67 |gned sto|p, unsig|
|000015a0| 6e 65 64 20 72 61 73 74 | 65 72 2c 20 69 6e 74 20 |ned rast|er, int |
|000015b0| 63 6f 6c 6f 72 29 0d 0a | 7b 0d 0a 23 64 65 66 69 |color)..|{..#defi|
|000015c0| 6e 65 20 47 52 41 50 48 | 49 43 53 43 20 20 20 30 |ne GRAPH|ICSC 0|
|000015d0| 58 30 33 43 45 0d 0a 23 | 64 65 66 69 6e 65 20 53 |X03CE..#|define S|
|000015e0| 45 51 55 45 4e 43 45 52 | 20 20 20 30 58 30 33 43 |EQUENCER| 0X03C|
|000015f0| 34 0d 0a 23 64 65 66 69 | 6e 65 20 42 49 54 5f 4d |4..#defi|ne BIT_M|
|00001600| 41 53 4b 20 20 20 20 38 | 0d 0a 0d 0a 20 20 20 20 |ASK 8|.... |
|00001610| 75 6e 73 69 67 6e 65 64 | 20 69 2c 20 6d 61 73 6b |unsigned| i, mask|
|00001620| 3b 0d 0a 20 20 20 20 42 | 59 54 45 20 6f 64 64 62 |;.. B|YTE oddb|
|00001630| 69 74 73 2c 20 62 79 74 | 65 2c 20 66 61 72 20 2a |its, byt|e, far *|
|00001640| 73 5f 6f 66 66 73 65 74 | 3b 0d 0a 20 20 20 20 69 |s_offset|;.. i|
|00001650| 6e 74 20 73 63 61 6e 5f | 6c 65 6e 3b 0d 0a 0d 0a |nt scan_|len;....|
|00001660| 20 20 20 20 73 63 61 6e | 5f 6c 65 6e 20 3d 20 73 | scan|_len = s|
|00001670| 74 6f 70 20 2d 20 73 74 | 61 72 74 3b 20 20 20 20 |top - st|art; |
|00001680| 20 20 20 20 2f 2a 20 6c | 65 6e 67 74 68 20 2d 31 | /* l|ength -1|
|00001690| 20 69 6e 20 70 69 78 65 | 6c 73 20 2a 2f 0d 0a 0d | in pixe|ls */...|
|000016a0| 0a 2f 2a 20 2d 2d 2d 20 | 4c 6f 61 64 20 53 45 54 |./* --- |Load SET|
|000016b0| 2f 52 45 53 45 54 20 72 | 65 67 69 73 74 65 72 73 |/RESET r|egisters|
|000016c0| 20 77 69 74 68 20 63 75 | 72 72 65 6e 74 20 63 6f | with cu|rrent co|
|000016d0| 6c 6f 72 20 20 20 20 20 | 20 20 20 20 20 20 20 20 |lor | |
|000016e0| 20 20 20 20 20 20 20 20 | 20 20 20 20 20 2a 2f 0d | | */.|
|000016f0| 0a 0d 0a 20 20 20 20 6f | 75 74 70 6f 72 74 28 47 |... o|utport(G|
|00001700| 52 41 50 48 49 43 53 43 | 2c 20 63 6f 6c 6f 72 20 |RAPHICSC|, color |
|00001710| 3c 3c 20 38 29 3b 20 2f | 2a 20 6d 6f 76 65 20 63 |<< 8); /|* move c|
|00001720| 6f 6c 6f 72 20 69 6e 74 | 6f 20 72 65 73 65 74 20 |olor int|o reset |
|00001730| 72 65 67 69 73 74 65 72 | 20 20 20 20 20 20 20 2a |register| *|
|00001740| 2f 0d 0a 20 20 20 20 6f | 75 74 70 6f 72 74 28 47 |/.. o|utport(G|
|00001750| 52 41 50 48 49 43 53 43 | 2c 20 30 58 30 46 30 31 |RAPHICSC|, 0X0F01|
|00001760| 29 3b 20 20 20 20 20 2f | 2a 20 65 6e 61 62 6c 65 |); /|* enable|
|00001770| 20 75 73 65 20 6f 66 20 | 72 65 73 65 74 20 72 65 | use of |reset re|
|00001780| 67 69 73 74 65 72 20 20 | 20 20 20 20 20 20 20 2a |gister | *|
|00001790| 2f 0d 0a 20 20 20 20 6f | 75 74 70 6f 72 74 28 53 |/.. o|utport(S|
|000017a0| 45 51 55 45 4e 43 45 52 | 2c 20 30 58 30 46 30 32 |EQUENCER|, 0X0F02|
|000017b0| 29 3b 20 20 20 20 20 2f | 2a 20 65 6e 61 62 6c 65 |); /|* enable|
|000017c0| 20 61 6c 6c 20 70 6c 61 | 6e 65 73 20 66 6f 72 20 | all pla|nes for |
|000017d0| 77 72 69 74 65 20 20 20 | 20 20 20 20 20 20 20 2a |write | *|
|000017e0| 2f 0d 0a 0d 0a 2f 2a 20 | 2d 2d 2d 2d 2d 2d 2d 2d |/..../* |--------|
|000017f0| 2d 2d 2d 20 43 4f 4d 50 | 55 54 45 20 41 44 44 52 |--- COMP|UTE ADDR|
|00001800| 45 53 53 20 41 4e 44 20 | 4d 41 53 4b 20 46 4f 52 |ESS AND |MASK FOR|
|00001810| 20 46 49 52 53 54 20 50 | 49 58 45 4c 20 2d 2d 2d | FIRST P|IXEL ---|
|00001820| 2d 2d 2d 2d 2d 2d 2d 2d | 2d 2d 20 20 20 20 20 20 |--------|-- |
|00001830| 20 2a 2f 0d 0a 20 20 20 | 20 73 5f 6f 66 66 73 65 | */.. | s_offse|
|00001840| 74 20 3d 20 76 69 64 65 | 6f 2e 62 61 73 65 20 2b |t = vide|o.base +|
|00001850| 20 73 63 72 65 65 6e 2e | 6c 6f 67 69 63 61 6c 5f | screen.|logical_|
|00001860| 77 69 64 74 68 2a 72 61 | 73 74 65 72 20 2b 20 28 |width*ra|ster + (|
|00001870| 73 74 61 72 74 20 3e 3e | 20 33 29 3b 0d 0a 20 20 |start >>| 3);.. |
|00001880| 20 20 69 66 20 28 20 28 | 6f 64 64 62 69 74 73 20 | if ( (|oddbits |
|00001890| 3d 20 73 74 61 72 74 20 | 26 20 37 29 20 21 3d 20 |= start |& 7) != |
|000018a0| 30 29 20 7b 0d 0a 20 20 | 20 20 20 20 20 20 6d 61 |0) {.. | ma|
|000018b0| 73 6b 20 3d 20 30 58 30 | 30 46 46 20 3e 3e 20 6f |sk = 0X0|0FF >> o|
|000018c0| 64 64 62 69 74 73 3b 0d | 0a 20 20 20 20 20 20 20 |ddbits;.|. |
|000018d0| 20 73 63 61 6e 5f 6c 65 | 6e 20 2b 3d 20 6f 64 64 | scan_le|n += odd|
|000018e0| 62 69 74 73 3b 0d 0a 20 | 20 20 20 20 20 20 20 73 |bits;.. | s|
|000018f0| 63 61 6e 5f 6c 65 6e 20 | 2d 3d 20 38 3b 0d 0a 20 |can_len |-= 8;.. |
|00001900| 20 20 20 20 20 20 20 69 | 66 20 28 73 63 61 6e 5f | i|f (scan_|
|00001910| 6c 65 6e 20 3c 20 30 29 | 20 7b 0d 0a 20 20 20 20 |len < 0)| {.. |
|00001920| 20 20 20 20 20 20 20 20 | 73 63 61 6e 5f 6c 65 6e | |scan_len|
|00001930| 20 3d 20 28 7e 73 63 61 | 6e 5f 6c 65 6e 29 20 2b | = (~sca|n_len) +|
|00001940| 20 31 3b 0d 0a 20 20 20 | 20 20 20 20 20 20 20 20 | 1;.. | |
|00001950| 20 6d 61 73 6b 20 3d 20 | 6d 61 73 6b 20 3e 3e 20 | mask = |mask >> |
|00001960| 28 42 59 54 45 29 20 73 | 63 61 6e 5f 6c 65 6e 3b |(BYTE) s|can_len;|
|00001970| 0d 0a 20 20 20 20 20 20 | 20 20 20 20 20 20 6d 61 |.. | ma|
|00001980| 73 6b 20 3d 20 6d 61 73 | 6b 20 3c 3c 20 28 42 59 |sk = mas|k << (BY|
|00001990| 54 45 29 20 73 63 61 6e | 5f 6c 65 6e 3b 0d 0a 20 |TE) scan|_len;.. |
|000019a0| 20 20 20 20 20 20 20 20 | 20 20 20 73 63 61 6e 5f | | scan_|
|000019b0| 6c 65 6e 20 3d 20 30 3b | 0d 0a 20 20 20 20 7d 0d |len = 0;|.. }.|
|000019c0| 0a 20 20 20 20 20 20 20 | 20 6f 75 74 70 6f 72 74 |. | outport|
|000019d0| 28 47 52 41 50 48 49 43 | 53 43 2c 20 28 6d 61 73 |(GRAPHIC|SC, (mas|
|000019e0| 6b 20 3c 3c 20 38 29 20 | 7c 20 42 49 54 5f 4d 41 |k << 8) || BIT_MA|
|000019f0| 53 4b 29 3b 20 2f 2a 20 | 75 6e 6d 61 73 6b 20 62 |SK); /* |unmask b|
|00001a00| 69 74 20 6d 61 73 6b 20 | 2a 2f 0d 0a 20 20 20 20 |it mask |*/.. |
|00001a10| 20 20 20 20 62 79 74 65 | 20 3d 20 2a 73 5f 6f 66 | byte| = *s_of|
|00001a20| 66 73 65 74 3b 20 20 20 | 20 20 20 20 20 20 20 20 |fset; | |
|00001a30| 20 20 20 20 20 20 2f 2a | 20 6c 61 74 63 68 20 64 | /*| latch d|
|00001a40| 61 74 61 20 2a 2f 0d 0a | 20 20 20 20 20 20 20 20 |ata */..| |
|00001a50| 2a 73 5f 6f 66 66 73 65 | 74 2b 2b 20 3d 20 62 79 |*s_offse|t++ = by|
|00001a60| 74 65 3b 20 20 20 20 20 | 20 20 20 20 20 20 20 20 |te; | |
|00001a70| 20 20 2f 2a 20 77 72 69 | 74 65 20 64 61 74 61 20 | /* wri|te data |
|00001a80| 2a 2f 0d 0a 20 20 20 20 | 7d 0d 0a 0d 0a 2f 2a 20 |*/.. |}..../* |
|00001a90| 2d 2d 2d 2d 2d 2d 2d 2d | 2d 2d 2d 2d 2d 2d 2d 2d |--------|--------|
|00001aa0| 20 57 52 49 54 45 20 43 | 4f 4d 50 4c 45 54 45 20 | WRITE C|OMPLETE |
|00001ab0| 42 59 54 45 53 20 2d 2d | 2d 2d 2d 2d 2d 2d 2d 2d |BYTES --|--------|
|00001ac0| 2d 2d 2d 2d 2d 2d 2d 2d | 2d 2d 20 20 20 20 20 20 |--------|-- |
|00001ad0| 20 2a 2f 0d 0a 20 20 20 | 20 69 66 20 28 73 63 61 | */.. | if (sca|
|00001ae0| 6e 5f 6c 65 6e 20 3e 3d | 20 38 29 20 7b 0d 0a 20 |n_len >=| 8) {.. |
|00001af0| 20 20 20 20 20 20 20 6f | 75 74 70 6f 72 74 28 47 | o|utport(G|
|00001b00| 52 41 50 48 49 43 53 43 | 2c 20 28 30 58 46 46 46 |RAPHICSC|, (0XFFF|
|00001b10| 46 20 3c 3c 20 38 29 20 | 7c 20 42 49 54 5f 4d 41 |F << 8) || BIT_MA|
|00001b20| 53 4b 29 3b 20 20 20 2f | 2a 20 75 6e 6d 61 73 6b |SK); /|* unmask|
|00001b30| 20 62 69 74 20 6d 61 73 | 6b 20 2a 2f 0d 0a 20 20 | bit mas|k */.. |
|00001b40| 20 20 20 20 20 20 66 6f | 72 20 28 69 3d 30 3b 20 | fo|r (i=0; |
|00001b50| 69 20 3c 20 28 73 63 61 | 6e 5f 6c 65 6e 20 3e 3e |i < (sca|n_len >>|
|00001b60| 20 33 29 3b 20 69 2b 2b | 29 20 2a 73 5f 6f 66 66 | 3); i++|) *s_off|
|00001b70| 73 65 74 2b 2b 20 3d 20 | 62 79 74 65 3b 0d 0a 20 |set++ = |byte;.. |
|00001b80| 20 20 20 7d 0d 0a 0d 0a | 2f 2a 20 2d 2d 2d 20 43 | }....|/* --- C|
|00001b90| 4f 4d 50 55 54 45 20 41 | 44 44 52 45 53 53 20 41 |OMPUTE A|DDRESS A|
|00001ba0| 4e 44 20 4d 41 53 4b 20 | 46 4f 52 20 4c 41 53 54 |ND MASK |FOR LAST|
|00001bb0| 20 50 49 58 45 4c 20 2d | 2d 2d 2d 2d 2d 2d 2d 2d | PIXEL -|--------|
|00001bc0| 2d 2d 2d 2d 20 20 20 20 | 20 20 20 20 2a 2f 0d 0a |---- | */..|
|00001bd0| 0d 0a 20 20 20 20 69 66 | 20 28 20 28 6f 64 64 62 |.. if| ( (oddb|
|00001be0| 69 74 73 20 3d 20 73 63 | 61 6e 5f 6c 65 6e 20 26 |its = sc|an_len &|
|00001bf0| 20 37 29 20 21 3d 20 30 | 29 20 7b 0d 0a 20 20 20 | 7) != 0|) {.. |
|00001c00| 20 20 20 20 20 6d 61 73 | 6b 20 3d 20 28 30 58 46 | mas|k = (0XF|
|00001c10| 46 20 3e 3e 20 6f 64 64 | 62 69 74 73 29 20 5e 20 |F >> odd|bits) ^ |
|00001c20| 30 58 46 46 3b 0d 0a 20 | 20 20 20 20 20 20 20 6f |0XFF;.. | o|
|00001c30| 75 74 70 6f 72 74 28 47 | 52 41 50 48 49 43 53 43 |utport(G|RAPHICSC|
|00001c40| 2c 20 28 6d 61 73 6b 20 | 3c 3c 20 38 29 20 7c 20 |, (mask |<< 8) | |
|00001c50| 42 49 54 5f 4d 41 53 4b | 29 3b 0d 0a 20 20 20 20 |BIT_MASK|);.. |
|00001c60| 20 20 20 20 62 79 74 65 | 20 3d 20 2a 73 5f 6f 66 | byte| = *s_of|
|00001c70| 66 73 65 74 3b 20 20 20 | 20 20 20 20 20 20 20 20 |fset; | |
|00001c80| 20 20 20 20 20 20 2f 2a | 20 6c 61 74 63 68 20 64 | /*| latch d|
|00001c90| 61 74 61 20 2a 2f 0d 0a | 20 20 20 20 20 20 20 20 |ata */..| |
|00001ca0| 2a 73 5f 6f 66 66 73 65 | 74 2b 2b 20 3d 20 62 79 |*s_offse|t++ = by|
|00001cb0| 74 65 3b 20 20 20 20 20 | 20 20 20 20 20 20 20 20 |te; | |
|00001cc0| 20 20 2f 2a 20 77 72 69 | 74 65 20 64 61 74 61 20 | /* wri|te data |
|00001cd0| 2a 2f 0d 0a 20 20 20 20 | 7d 0d 0a 0d 0a 0d 0a 2f |*/.. |}....../|
|00001ce0| 2a 20 52 45 53 54 4f 52 | 45 20 42 49 54 20 4d 41 |* RESTOR|E BIT MA|
|00001cf0| 53 4b 20 41 4e 44 20 53 | 45 54 2f 52 45 53 45 54 |SK AND S|ET/RESET|
|00001d00| 20 52 45 47 49 53 54 45 | 52 53 20 2a 2f 0d 0a 20 | REGISTE|RS */.. |
|00001d10| 20 20 20 6f 75 74 70 6f | 72 74 28 47 52 41 50 48 | outpo|rt(GRAPH|
|00001d20| 49 43 53 43 2c 20 28 30 | 58 46 46 46 46 20 3c 3c |ICSC, (0|XFFFF <<|
|00001d30| 20 38 29 20 7c 20 42 49 | 54 5f 4d 41 53 4b 29 3b | 8) | BI|T_MASK);|
|00001d40| 0d 0a 20 20 20 20 6f 75 | 74 70 6f 72 74 28 47 52 |.. ou|tport(GR|
|00001d50| 41 50 48 49 43 53 43 2c | 20 30 58 30 30 30 31 29 |APHICSC,| 0X0001)|
|00001d60| 3b 0d 0a 7d 0d 0a 0d 0a | 0d 0a 0d 0a 2f 2a 20 53 |;..}....|..../* S|
|00001d70| 4d 4f 4f 54 48 5f 53 43 | 52 4f 4c 4c 20 73 63 72 |MOOTH_SC|ROLL scr|
|00001d80| 6f 6c 6c 73 20 74 68 65 | 20 45 47 41 20 76 69 64 |olls the| EGA vid|
|00001d90| 65 6f 20 62 75 66 66 65 | 72 20 74 68 65 20 6e 75 |eo buffe|r the nu|
|00001da0| 6d 62 65 72 20 6f 66 20 | 73 63 61 6e 20 6c 69 6e |mber of |scan lin|
|00001db0| 65 73 0d 0a 69 6e 64 69 | 63 61 74 65 64 20 69 6e |es..indi|cated in|
|00001dc0| 20 22 63 6f 75 6e 74 22 | 20 61 74 20 61 20 73 70 | "count"| at a sp|
|00001dd0| 65 65 64 20 6f 66 20 22 | 73 70 65 65 64 22 20 73 |eed of "|speed" s|
|00001de0| 63 61 6e 20 6c 69 6e 65 | 73 20 70 65 72 20 76 65 |can line|s per ve|
|00001df0| 72 74 69 63 61 6c 20 72 | 65 74 72 61 63 65 2e 0d |rtical r|etrace..|
|00001e00| 0a 2a 2f 0d 0a 75 6e 73 | 69 67 6e 65 64 20 73 6d |.*/..uns|igned sm|
|00001e10| 6f 6f 74 68 5f 73 63 72 | 6f 6c 6c 28 69 6e 74 20 |ooth_scr|oll(int |
|00001e20| 63 6f 75 6e 74 2c 20 75 | 6e 73 69 67 6e 65 64 20 |count, u|nsigned |
|00001e30| 73 70 65 65 64 29 0d 0a | 7b 0d 0a 0d 0a 20 20 20 |speed)..|{.... |
|00001e40| 20 75 6e 73 69 67 6e 65 | 64 20 69 2c 20 6d 61 78 | unsigne|d i, max|
|00001e50| 5f 63 6f 75 6e 74 3b 0d | 0a 0d 0a 20 20 20 20 6d |_count;.|... m|
|00001e60| 61 78 5f 63 6f 75 6e 74 | 20 3d 20 28 63 6f 75 6e |ax_count| = (coun|
|00001e70| 74 20 3c 20 30 29 20 3f | 20 2d 63 6f 75 6e 74 20 |t < 0) ?| -count |
|00001e80| 3a 20 63 6f 75 6e 74 3b | 0d 0a 0d 0a 20 20 20 20 |: count;|.... |
|00001e90| 2f 2a 20 47 45 54 20 54 | 48 45 20 53 54 41 52 54 |/* GET T|HE START|
|00001ea0| 20 41 44 44 52 45 53 53 | 20 4f 46 20 54 48 45 20 | ADDRESS| OF THE |
|00001eb0| 53 43 52 45 45 4e 20 42 | 55 46 46 45 52 20 2a 2f |SCREEN B|UFFER */|
|00001ec0| 0d 0a 20 20 20 20 6f 75 | 74 70 6f 72 74 62 28 76 |.. ou|tportb(v|
|00001ed0| 69 64 65 6f 2e 63 72 74 | 63 2c 20 53 54 41 52 54 |ideo.crt|c, START|
|00001ee0| 5f 41 44 44 52 45 53 53 | 5f 48 49 47 48 29 3b 20 |_ADDRESS|_HIGH); |
|00001ef0| 20 20 20 20 20 20 2f 2a | 20 48 69 67 68 20 62 79 | /*| High by|
|00001f00| 74 65 20 2a 2f 0d 0a 20 | 20 20 20 73 63 72 65 65 |te */.. | scree|
|00001f10| 6e 2e 73 74 61 72 74 5f | 61 64 64 72 20 3d 20 69 |n.start_|addr = i|
|00001f20| 6e 70 6f 72 74 62 28 76 | 69 64 65 6f 2e 63 72 74 |nportb(v|ideo.crt|
|00001f30| 63 2b 31 29 20 3c 3c 20 | 38 3b 0d 0a 20 20 20 20 |c+1) << |8;.. |
|00001f40| 6f 75 74 70 6f 72 74 62 | 28 76 69 64 65 6f 2e 63 |outportb|(video.c|
|00001f50| 72 74 63 2c 20 53 54 41 | 52 54 5f 41 44 44 52 45 |rtc, STA|RT_ADDRE|
|00001f60| 53 53 5f 4c 4f 57 29 3b | 20 20 20 20 20 20 20 20 |SS_LOW);| |
|00001f70| 2f 2a 20 4c 6f 77 20 62 | 79 74 65 20 2a 2f 0d 0a |/* Low b|yte */..|
|00001f80| 20 20 20 20 73 63 72 65 | 65 6e 2e 73 74 61 72 74 | scre|en.start|
|00001f90| 5f 61 64 64 72 20 7c 3d | 20 69 6e 70 6f 72 74 62 |_addr |=| inportb|
|00001fa0| 28 76 69 64 65 6f 2e 63 | 72 74 63 2b 31 29 3b 0d |(video.c|rtc+1);.|
|00001fb0| 0a 0d 0a 20 20 20 20 2f | 2a 20 43 4f 55 4e 54 20 |... /|* COUNT |
|00001fc0| 3e 20 30 20 3d 3e 20 53 | 43 52 4f 4c 4c 20 53 43 |> 0 => S|CROLL SC|
|00001fd0| 52 45 45 4e 20 49 4d 41 | 47 45 20 55 50 57 41 52 |REEN IMA|GE UPWAR|
|00001fe0| 44 53 2e 20 2a 2f 0d 0a | 20 20 20 20 66 6f 72 28 |DS. */..| for(|
|00001ff0| 69 3d 30 3b 69 20 3c 20 | 6d 61 78 5f 63 6f 75 6e |i=0;i < |max_coun|
|00002000| 74 3b 20 69 2b 3d 73 70 | 65 65 64 29 20 7b 0d 0a |t; i+=sp|eed) {..|
|00002010| 20 20 20 20 20 20 20 20 | 73 63 72 65 65 6e 2e 73 | |screen.s|
|00002020| 74 61 72 74 5f 61 64 64 | 72 20 3d 20 28 63 6f 75 |tart_add|r = (cou|
|00002030| 6e 74 20 3e 20 30 29 20 | 3f 0d 0a 20 20 20 20 20 |nt > 0) |?.. |
|00002040| 20 20 20 20 20 20 20 73 | 63 72 65 65 6e 2e 73 74 | s|creen.st|
|00002050| 61 72 74 5f 61 64 64 72 | 20 2b 20 73 63 72 65 65 |art_addr| + scree|
|00002060| 6e 2e 6c 6f 67 69 63 61 | 6c 5f 77 69 64 74 68 2a |n.logica|l_width*|
|00002070| 73 70 65 65 64 20 3a 0d | 0a 20 20 20 20 20 20 20 |speed :.|. |
|00002080| 20 20 20 20 20 73 63 72 | 65 65 6e 2e 73 74 61 72 | scr|een.star|
|00002090| 74 5f 61 64 64 72 20 2d | 20 73 63 72 65 65 6e 2e |t_addr -| screen.|
|000020a0| 6c 6f 67 69 63 61 6c 5f | 77 69 64 74 68 2a 73 70 |logical_|width*sp|
|000020b0| 65 65 64 3b 0d 0a 20 20 | 20 20 20 20 20 20 2f 2a |eed;.. | /*|
|000020c0| 20 77 61 69 74 20 66 6f | 72 20 74 68 65 20 65 6e | wait fo|r the en|
|000020d0| 64 20 6f 66 20 61 20 76 | 65 72 74 69 63 61 6c 20 |d of a v|ertical |
|000020e0| 72 65 74 72 61 63 65 20 | 2a 2f 0d 0a 20 20 20 20 |retrace |*/.. |
|000020f0| 20 20 20 20 77 68 69 6c | 65 20 28 69 6e 70 6f 72 | whil|e (inpor|
|00002100| 74 62 28 76 69 64 65 6f | 2e 69 73 72 29 20 26 20 |tb(video|.isr) & |
|00002110| 38 29 3b 0d 0a 20 20 20 | 20 20 20 20 20 2f 2a 20 |8);.. | /* |
|00002120| 77 61 69 74 20 66 6f 72 | 20 74 68 65 20 6e 65 78 |wait for| the nex|
|00002130| 74 20 76 65 72 74 69 63 | 61 6c 20 72 65 74 72 61 |t vertic|al retra|
|00002140| 63 65 20 2a 2f 0d 0a 20 | 20 20 20 20 20 20 20 77 |ce */.. | w|
|00002150| 68 69 6c 65 20 28 21 28 | 69 6e 70 6f 72 74 62 28 |hile (!(|inportb(|
|00002160| 76 69 64 65 6f 2e 69 73 | 72 29 20 26 20 38 29 29 |video.is|r) & 8))|
|00002170| 3b 0d 0a 20 20 20 20 20 | 20 20 20 73 65 74 5f 73 |;.. | set_s|
|00002180| 74 61 72 74 5f 61 64 64 | 72 28 73 63 72 65 65 6e |tart_add|r(screen|
|00002190| 2e 73 74 61 72 74 5f 61 | 64 64 72 29 3b 0d 0a 20 |.start_a|ddr);.. |
|000021a0| 20 20 20 7d 0d 0a 20 20 | 20 20 72 65 74 75 72 6e | }.. | return|
|000021b0| 20 28 73 63 72 65 65 6e | 2e 73 74 61 72 74 5f 61 | (screen|.start_a|
|000021c0| 64 64 72 29 3b 0d 0a 7d | 0d 0a 0d 0a 0d 0a 2f 2a |ddr);..}|....../*|
|000021d0| 20 53 4d 4f 4f 54 48 5f | 50 41 4e 0d 0a 54 68 69 | SMOOTH_|PAN..Thi|
|000021e0| 73 20 66 75 6e 63 74 69 | 6f 6e 20 69 6e 76 6f 6b |s functi|on invok|
|000021f0| 65 73 20 73 6d 6f 6f 74 | 68 20 70 61 6e 6e 69 6e |es smoot|h pannin|
|00002200| 67 20 6f 6e 20 74 68 65 | 20 45 47 41 2f 56 47 41 |g on the| EGA/VGA|
|00002210| 2e 20 20 54 68 65 20 66 | 75 6e 63 74 69 6f 6e 20 |. The f|unction |
|00002220| 63 61 6c 63 75 6c 61 74 | 65 73 0d 0a 74 68 65 20 |calculat|es..the |
|00002230| 6e 75 6d 62 65 72 20 6f | 66 20 73 63 61 6e 20 6c |number o|f scan l|
|00002240| 69 6e 65 73 20 70 65 72 | 20 72 6f 77 2e 20 20 54 |ines per| row. T|
|00002250| 68 65 20 73 70 65 65 64 | 20 76 61 72 69 61 62 6c |he speed| variabl|
|00002260| 65 20 61 64 6a 75 73 74 | 73 20 74 68 65 20 73 70 |e adjust|s the sp|
|00002270| 65 65 64 20 69 6e 0d 0a | 70 69 78 65 6c 73 20 70 |eed in..|pixels p|
|00002280| 65 72 20 76 65 72 74 69 | 63 61 6c 20 72 65 74 72 |er verti|cal retr|
|00002290| 61 63 65 20 61 6e 64 20 | 74 61 6b 65 73 20 76 61 |ace and |takes va|
|000022a0| 6c 75 65 73 20 69 6e 20 | 74 68 65 20 72 61 6e 67 |lues in |the rang|
|000022b0| 65 20 31 2d 38 2e 0d 0a | 2a 2f 0d 0a 75 6e 73 69 |e 1-8...|*/..unsi|
|000022c0| 67 6e 65 64 20 73 6d 6f | 6f 74 68 5f 70 61 6e 28 |gned smo|oth_pan(|
|000022d0| 69 6e 74 20 63 6f 75 6e | 74 2c 20 75 6e 73 69 67 |int coun|t, unsig|
|000022e0| 6e 65 64 20 73 70 65 65 | 64 29 0d 0a 7b 0d 0a 20 |ned spee|d)..{.. |
|000022f0| 20 20 20 75 6e 73 69 67 | 6e 65 64 20 69 3b 0d 0a | unsig|ned i;..|
|00002300| 0d 0a 20 20 20 20 2f 2a | 20 63 6f 75 6e 74 20 67 |.. /*| count g|
|00002310| 72 65 61 74 65 72 20 74 | 68 61 6e 20 7a 65 72 6f |reater t|han zero|
|00002320| 20 28 6d 6f 76 65 20 76 | 69 65 77 70 6f 72 74 20 | (move v|iewport |
|00002330| 74 6f 20 74 68 65 20 72 | 69 67 68 74 29 20 2a 2f |to the r|ight) */|
|00002340| 0d 0a 20 20 20 20 69 66 | 20 28 63 6f 75 6e 74 3e |.. if| (count>|
|00002350| 30 20 26 26 20 21 72 69 | 67 68 74 5f 65 64 67 65 |0 && !ri|ght_edge|
|00002360| 29 20 66 6f 72 28 69 3d | 30 3b 69 3c 63 6f 75 6e |) for(i=|0;i<coun|
|00002370| 74 3b 29 20 7b 0d 0a 0d | 0a 20 20 20 20 20 20 20 |t;) {...|. |
|00002380| 20 2f 2a 20 69 66 20 77 | 65 20 68 61 76 65 20 73 | /* if w|e have s|
|00002390| 63 72 6f 6c 6c 65 64 20 | 61 20 66 75 6c 6c 20 63 |crolled |a full c|
|000023a0| 68 61 72 61 63 74 65 72 | 2c 20 72 65 73 65 74 20 |haracter|, reset |
|000023b0| 73 74 61 72 74 20 61 64 | 64 72 65 73 73 20 2a 2f |start ad|dress */|
|000023c0| 0d 0a 20 20 20 20 20 20 | 20 20 69 66 20 28 68 70 |.. | if (hp|
|000023d0| 65 6c 3e 3d 38 29 20 7b | 0d 0a 20 20 20 20 20 20 |el>=8) {|.. |
|000023e0| 20 20 20 20 20 20 73 63 | 72 65 65 6e 2e 73 74 61 | sc|reen.sta|
|000023f0| 72 74 5f 61 64 64 72 2b | 2b 3b 0d 0a 20 20 20 20 |rt_addr+|+;.. |
|00002400| 20 20 20 20 20 20 20 20 | 6c 65 66 74 5f 65 64 67 | |left_edg|
|00002410| 65 20 3d 20 46 41 4c 53 | 45 3b 0d 0a 20 20 20 20 |e = FALS|E;.. |
|00002420| 20 20 20 20 20 20 20 20 | 69 66 20 28 21 28 73 63 | |if (!(sc|
|00002430| 72 65 65 6e 2e 73 74 61 | 72 74 5f 61 64 64 72 20 |reen.sta|rt_addr |
|00002440| 25 20 28 73 63 72 65 65 | 6e 2e 6c 6f 67 69 63 61 |% (scree|n.logica|
|00002450| 6c 5f 77 69 64 74 68 29 | 29 29 20 72 69 67 68 74 |l_width)|)) right|
|00002460| 5f 65 64 67 65 20 3d 20 | 54 52 55 45 3b 0d 0a 20 |_edge = |TRUE;.. |
|00002470| 20 20 20 20 20 20 20 20 | 20 20 20 69 66 20 28 21 | | if (!|
|00002480| 72 69 67 68 74 5f 65 64 | 67 65 29 20 68 70 65 6c |right_ed|ge) hpel|
|00002490| 20 25 3d 20 38 3b 20 20 | 20 20 2f 2a 20 72 65 73 | %= 8; | /* res|
|000024a0| 65 74 20 74 68 65 20 70 | 65 6c 20 63 6f 75 6e 74 |et the p|el count|
|000024b0| 65 72 20 2a 2f 0d 0a 20 | 20 20 20 20 20 20 20 20 |er */.. | |
|000024c0| 20 20 20 65 6c 73 65 20 | 7b 0d 0a 20 20 20 20 20 | else |{.. |
|000024d0| 20 20 20 20 20 20 20 20 | 20 20 20 68 70 65 6c 20 | | hpel |
|000024e0| 3d 20 30 3b 0d 0a 20 20 | 20 20 20 20 20 20 20 20 |= 0;.. | |
|000024f0| 20 20 20 20 20 20 69 20 | 3d 20 63 6f 75 6e 74 20 | i |= count |
|00002500| 2d 20 31 3b 0d 0a 20 20 | 20 20 20 20 20 20 20 20 |- 1;.. | |
|00002510| 20 20 7d 0d 0a 20 20 20 | 20 20 20 20 20 20 20 20 | }.. | |
|00002520| 20 73 65 74 5f 73 74 61 | 72 74 5f 61 64 64 72 28 | set_sta|rt_addr(|
|00002530| 73 63 72 65 65 6e 2e 73 | 74 61 72 74 5f 61 64 64 |screen.s|tart_add|
|00002540| 72 29 3b 0d 0a 20 20 20 | 20 20 20 20 20 7d 0d 0a |r);.. | }..|
|00002550| 20 20 20 20 20 20 20 20 | 66 6f 72 28 3b 68 70 65 | |for(;hpe|
|00002560| 6c 20 3c 20 38 20 26 26 | 20 69 20 3c 20 63 6f 75 |l < 8 &&| i < cou|
|00002570| 6e 74 3b 69 2b 3d 73 70 | 65 65 64 2c 20 68 70 65 |nt;i+=sp|eed, hpe|
|00002580| 6c 2b 3d 73 70 65 65 64 | 29 20 73 65 74 5f 70 65 |l+=speed|) set_pe|
|00002590| 6c 5f 70 61 6e 28 68 70 | 65 6c 29 3b 0d 0a 20 20 |l_pan(hp|el);.. |
|000025a0| 20 20 7d 0d 0a 0d 0a 20 | 20 20 20 2f 2a 20 63 6f | }.... | /* co|
|000025b0| 75 6e 74 20 6c 65 73 73 | 20 74 68 61 6e 20 7a 65 |unt less| than ze|
|000025c0| 72 6f 20 28 6d 6f 76 65 | 20 76 69 65 77 70 6f 72 |ro (move| viewpor|
|000025d0| 74 20 74 6f 20 74 68 65 | 20 6c 65 66 74 29 20 2a |t to the| left) *|
|000025e0| 2f 0d 0a 20 20 20 20 65 | 6c 73 65 20 69 66 20 28 |/.. e|lse if (|
|000025f0| 63 6f 75 6e 74 3c 30 29 | 20 7b 0d 0a 20 20 20 20 |count<0)| {.. |
|00002600| 20 20 20 20 69 66 20 28 | 68 70 65 6c 3e 37 29 20 | if (|hpel>7) |
|00002610| 68 70 65 6c 20 3d 20 68 | 70 65 6c 20 2d 20 38 3b |hpel = h|pel - 8;|
|00002620| 0d 0a 20 20 20 20 20 20 | 20 20 66 6f 72 28 69 3d |.. | for(i=|
|00002630| 30 3b 69 3c 28 2d 63 6f | 75 6e 74 29 20 3b 29 20 |0;i<(-co|unt) ;) |
|00002640| 7b 0d 0a 20 20 20 20 20 | 20 20 20 20 20 20 20 2f |{.. | /|
|00002650| 2a 20 69 66 20 77 65 20 | 68 61 76 65 20 73 63 72 |* if we |have scr|
|00002660| 6f 6c 6c 65 64 20 61 20 | 66 75 6c 6c 20 63 68 61 |olled a |full cha|
|00002670| 72 61 63 74 65 72 2c 20 | 72 65 73 65 74 20 73 74 |racter, |reset st|
|00002680| 61 72 74 20 61 64 64 72 | 65 73 73 20 2a 2f 0d 0a |art addr|ess */..|
|00002690| 20 20 20 20 20 20 20 20 | 20 20 20 20 69 66 20 28 | | if (|
|000026a0| 68 70 65 6c 3c 30 20 26 | 26 20 21 6c 65 66 74 5f |hpel<0 &|& !left_|
|000026b0| 65 64 67 65 29 20 7b 0d | 0a 20 20 20 20 20 20 20 |edge) {.|. |
|000026c0| 20 20 20 20 20 20 20 20 | 20 73 63 72 65 65 6e 2e | | screen.|
|000026d0| 73 74 61 72 74 5f 61 64 | 64 72 2d 2d 3b 0d 0a 20 |start_ad|dr--;.. |
|000026e0| 20 20 20 20 20 20 20 20 | 20 20 20 20 20 20 20 72 | | r|
|000026f0| 69 67 68 74 5f 65 64 67 | 65 20 3d 20 46 41 4c 53 |ight_edg|e = FALS|
|00002700| 45 3b 0d 0a 20 20 20 20 | 20 20 20 20 20 20 20 20 |E;.. | |
|00002710| 20 20 20 20 69 66 20 28 | 21 28 73 63 72 65 65 6e | if (|!(screen|
|00002720| 2e 73 74 61 72 74 5f 61 | 64 64 72 20 25 20 28 73 |.start_a|ddr % (s|
|00002730| 63 72 65 65 6e 2e 6c 6f | 67 69 63 61 6c 5f 77 69 |creen.lo|gical_wi|
|00002740| 64 74 68 29 29 29 20 6c | 65 66 74 5f 65 64 67 65 |dth))) l|eft_edge|
|00002750| 20 3d 20 54 52 55 45 3b | 0d 0a 20 20 20 20 20 20 | = TRUE;|.. |
|00002760| 20 20 20 20 20 20 20 20 | 20 20 68 70 65 6c 20 3d | | hpel =|
|00002770| 20 38 20 2b 20 68 70 65 | 6c 3b 0d 0a 20 20 20 20 | 8 + hpe|l;.. |
|00002780| 20 20 20 20 20 20 20 20 | 20 20 20 20 73 65 74 5f | | set_|
|00002790| 73 74 61 72 74 5f 61 64 | 64 72 28 73 63 72 65 65 |start_ad|dr(scree|
|000027a0| 6e 2e 73 74 61 72 74 5f | 61 64 64 72 29 3b 0d 0a |n.start_|addr);..|
|000027b0| 20 20 20 20 20 20 20 20 | 20 20 20 20 7d 0d 0a 20 | | }.. |
|000027c0| 20 20 20 20 20 20 20 20 | 20 20 20 65 6c 73 65 20 | | else |
|000027d0| 69 66 20 28 68 70 65 6c | 3c 30 20 26 26 20 6c 65 |if (hpel|<0 && le|
|000027e0| 66 74 5f 65 64 67 65 29 | 20 69 20 3d 20 28 2d 63 |ft_edge)| i = (-c|
|000027f0| 6f 75 6e 74 29 3b 0d 0a | 20 20 20 20 20 20 20 20 |ount);..| |
|00002800| 20 20 20 20 66 6f 72 28 | 3b 68 70 65 6c 20 3e 3d | for(|;hpel >=|
|00002810| 20 30 20 26 26 20 69 20 | 3c 20 28 2d 63 6f 75 6e | 0 && i |< (-coun|
|00002820| 74 29 3b 69 2b 3d 73 70 | 65 65 64 2c 20 68 70 65 |t);i+=sp|eed, hpe|
|00002830| 6c 2d 3d 73 70 65 65 64 | 29 20 73 65 74 5f 70 65 |l-=speed|) set_pe|
|00002840| 6c 5f 70 61 6e 28 68 70 | 65 6c 29 3b 0d 0a 20 20 |l_pan(hp|el);.. |
|00002850| 20 20 20 20 20 20 7d 0d | 0a 20 20 20 20 7d 0d 0a | }.|. }..|
|00002860| 20 20 20 20 72 65 74 75 | 72 6e 20 28 73 63 72 65 | retu|rn (scre|
|00002870| 65 6e 2e 73 74 61 72 74 | 5f 61 64 64 72 29 3b 0d |en.start|_addr);.|
|00002880| 0a 7d 0d 0a 0d 0a 0d 0a | 2f 2a 20 53 45 54 5f 4c |.}......|/* SET_L|
|00002890| 4f 47 49 43 41 4c 5f 53 | 43 52 45 45 4e 5f 57 49 |OGICAL_S|CREEN_WI|
|000028a0| 44 54 48 20 64 65 66 69 | 6e 65 73 20 61 6e 20 45 |DTH defi|nes an E|
|000028b0| 47 41 2f 56 47 41 20 73 | 63 72 65 65 6e 20 77 69 |GA/VGA s|creen wi|
|000028c0| 64 74 68 20 66 6f 72 20 | 73 6d 6f 6f 74 68 20 70 |dth for |smooth p|
|000028d0| 61 6e 6e 69 6e 67 0d 0a | 61 6e 64 20 73 65 74 73 |anning..|and sets|
|000028e0| 20 74 68 65 20 74 68 65 | 20 67 6c 6f 62 61 6c 20 | the the| global |
|000028f0| 76 61 72 69 61 62 6c 65 | 20 22 73 63 72 65 65 6e |variable| "screen|
|00002900| 2e 63 6f 6c 73 2e 22 20 | 20 73 63 72 65 65 6e 2e |.cols." | screen.|
|00002910| 63 6f 6c 73 20 6d 75 73 | 74 20 62 65 20 72 65 73 |cols mus|t be res|
|00002920| 74 6f 72 65 64 0d 0a 77 | 68 65 6e 20 73 6d 6f 6f |tored..w|hen smoo|
|00002930| 74 68 20 70 61 6e 6e 69 | 6e 67 20 69 73 20 66 69 |th panni|ng is fi|
|00002940| 6e 69 73 68 65 64 20 6f | 72 20 73 75 62 73 65 71 |nished o|r subseq|
|00002950| 75 65 6e 74 20 73 63 72 | 65 65 6e 20 77 72 69 74 |uent scr|een writ|
|00002960| 65 73 20 77 69 6c 6c 20 | 61 64 64 72 65 73 73 20 |es will |address |
|00002970| 74 68 65 0d 0a 77 72 6f | 6e 67 20 73 63 72 65 65 |the..wro|ng scree|
|00002980| 6e 20 6c 6f 63 61 74 69 | 6f 6e 73 2e 0d 0a 6c 5f |n locati|ons...l_|
|00002990| 77 69 64 74 68 20 69 73 | 20 74 68 65 20 77 69 64 |width is| the wid|
|000029a0| 74 68 20 6f 66 20 74 68 | 65 20 6c 6f 67 69 63 61 |th of th|e logica|
|000029b0| 6c 20 73 63 72 65 65 6e | 20 69 6e 20 62 79 74 65 |l screen| in byte|
|000029c0| 73 2e 20 4d 61 78 20 35 | 31 32 2e 0d 0a 2a 2f 0d |s. Max 5|12...*/.|
|000029d0| 0a 75 6e 73 69 67 6e 65 | 64 20 73 65 74 5f 6c 6f |.unsigne|d set_lo|
|000029e0| 67 69 63 61 6c 5f 73 63 | 72 65 65 6e 5f 77 69 64 |gical_sc|reen_wid|
|000029f0| 74 68 28 75 6e 73 69 67 | 6e 65 64 20 6c 5f 77 69 |th(unsig|ned l_wi|
|00002a00| 64 74 68 29 0d 0a 7b 0d | 0a 20 20 20 20 6c 5f 77 |dth)..{.|. l_w|
|00002a10| 69 64 74 68 20 3d 20 28 | 6c 5f 77 69 64 74 68 20 |idth = (|l_width |
|00002a20| 3e 20 35 31 32 29 20 3f | 20 35 31 32 20 3a 20 6c |> 512) ?| 512 : l|
|00002a30| 5f 77 69 64 74 68 3b 0d | 0a 0d 0a 20 20 20 20 2f |_width;.|... /|
|00002a40| 2a 20 73 65 74 20 73 63 | 72 65 65 6e 5f 63 6f 6c |* set sc|reen_col|
|00002a50| 73 20 2a 2f 0d 0a 20 20 | 20 20 73 63 72 65 65 6e |s */.. | screen|
|00002a60| 2e 63 6f 6c 73 20 3d 20 | 6c 5f 77 69 64 74 68 3b |.cols = |l_width;|
|00002a70| 0d 0a 0d 0a 20 20 20 20 | 2f 2a 20 73 65 74 20 6c |.... |/* set l|
|00002a80| 6f 67 69 63 61 6c 20 73 | 63 72 65 65 6e 20 77 69 |ogical s|creen wi|
|00002a90| 64 74 68 20 2a 2f 0d 0a | 20 20 20 20 6c 5f 77 69 |dth */..| l_wi|
|00002aa0| 64 74 68 20 3e 3e 3d 20 | 31 3b 20 20 20 20 20 20 |dth >>= |1; |
|00002ab0| 20 20 20 20 20 20 20 20 | 20 20 20 20 20 20 20 20 | | |
|00002ac0| 20 20 20 20 20 20 20 20 | 20 20 20 20 2f 2a 20 63 | | /* c|
|00002ad0| 6f 6e 76 65 72 74 20 74 | 6f 20 77 6f 72 64 73 20 |onvert t|o words |
|00002ae0| 2a 2f 0d 0a 20 20 20 20 | 6f 75 74 70 6f 72 74 28 |*/.. |outport(|
|00002af0| 76 69 64 65 6f 2e 63 72 | 74 63 2c 20 28 6c 5f 77 |video.cr|tc, (l_w|
|00002b00| 69 64 74 68 20 3c 3c 20 | 38 29 20 7c 20 4f 46 46 |idth << |8) | OFF|
|00002b10| 53 45 54 5f 52 45 47 29 | 3b 0d 0a 0d 0a 20 20 20 |SET_REG)|;.... |
|00002b20| 20 72 65 74 75 72 6e 20 | 28 6c 5f 77 69 64 74 68 | return |(l_width|
|00002b30| 20 3c 3c 20 31 29 3b 0d | 0a 7d 0d 0a 0d 0a 0d 0a | << 1);.|.}......|
|00002b40| 2f 2a 20 53 45 54 5f 53 | 54 41 52 54 5f 41 44 44 |/* SET_S|TART_ADD|
|00002b50| 52 45 53 53 20 2d 2d 20 | 53 65 74 73 20 74 68 65 |RESS -- |Sets the|
|00002b60| 20 73 74 61 72 74 20 61 | 64 64 72 65 73 73 20 6f | start a|ddress o|
|00002b70| 66 20 74 68 65 20 73 63 | 72 65 65 6e 2e 20 49 2e |f the sc|reen. I.|
|00002b80| 65 2e 20 74 68 65 20 20 | 2a 2f 0d 0a 2f 2a 20 61 |e. the |*/../* a|
|00002b90| 64 64 72 65 73 73 20 74 | 68 61 74 20 6f 63 63 75 |ddress t|hat occu|
|00002ba0| 70 69 65 73 20 74 68 65 | 20 74 6f 70 20 6c 65 66 |pies the| top lef|
|00002bb0| 74 20 6f 66 20 74 68 65 | 20 73 63 72 65 65 6e 2e |t of the| screen.|
|00002bc0| 20 20 20 20 20 20 20 20 | 20 20 20 20 20 20 20 20 | | |
|00002bd0| 20 20 20 20 2a 2f 0d 0a | 76 6f 69 64 20 73 65 74 | */..|void set|
|00002be0| 5f 73 74 61 72 74 5f 61 | 64 64 72 28 75 6e 73 69 |_start_a|ddr(unsi|
|00002bf0| 67 6e 65 64 20 73 74 61 | 72 74 5f 61 64 64 72 29 |gned sta|rt_addr)|
|00002c00| 0d 0a 7b 0d 0a 20 20 20 | 20 2f 2a 20 61 64 64 72 |..{.. | /* addr|
|00002c10| 65 73 73 20 74 68 65 20 | 73 74 61 72 74 20 61 64 |ess the |start ad|
|00002c20| 64 72 65 73 73 20 68 69 | 67 68 20 72 65 67 69 73 |dress hi|gh regis|
|00002c30| 74 65 72 20 2a 2f 0d 0a | 20 20 20 20 6f 75 74 70 |ter */..| outp|
|00002c40| 6f 72 74 28 76 69 64 65 | 6f 2e 63 72 74 63 2c 20 |ort(vide|o.crtc, |
|00002c50| 28 73 74 61 72 74 5f 61 | 64 64 72 20 26 20 30 58 |(start_a|ddr & 0X|
|00002c60| 46 46 30 30 29 20 7c 20 | 53 54 41 52 54 5f 41 44 |FF00) | |START_AD|
|00002c70| 44 52 45 53 53 5f 48 49 | 47 48 29 3b 0d 0a 0d 0a |DRESS_HI|GH);....|
|00002c80| 20 20 20 20 2f 2a 20 61 | 64 64 72 65 73 73 20 74 | /* a|ddress t|
|00002c90| 68 65 20 73 74 61 72 74 | 20 61 64 64 72 65 73 73 |he start| address|
|00002ca0| 20 6c 6f 77 20 72 65 67 | 69 73 74 65 72 20 2a 2f | low reg|ister */|
|00002cb0| 0d 0a 20 20 20 20 6f 75 | 74 70 6f 72 74 28 76 69 |.. ou|tport(vi|
|00002cc0| 64 65 6f 2e 63 72 74 63 | 2c 20 28 73 74 61 72 74 |deo.crtc|, (start|
|00002cd0| 5f 61 64 64 72 20 3c 3c | 20 38 29 20 7c 20 53 54 |_addr <<| 8) | ST|
|00002ce0| 41 52 54 5f 41 44 44 52 | 45 53 53 5f 4c 4f 57 29 |ART_ADDR|ESS_LOW)|
|00002cf0| 3b 0d 0a 7d 0d 0a 0d 0a | 0d 0a 2f 2a 20 53 45 54 |;..}....|../* SET|
|00002d00| 5f 50 45 4c 5f 50 41 4e | 20 2d 2d 20 53 65 74 73 |_PEL_PAN| -- Sets|
|00002d10| 20 74 68 65 20 68 6f 72 | 69 7a 6f 6e 74 61 6c 20 | the hor|izontal |
|00002d20| 70 65 6c 20 70 61 6e 6e | 69 6e 67 20 72 65 67 69 |pel pann|ing regi|
|00002d30| 73 74 65 72 20 74 6f 20 | 74 68 65 20 76 61 6c 75 |ster to |the valu|
|00002d40| 65 20 20 20 20 20 2a 2f | 0d 0a 2f 2a 20 73 70 65 |e */|../* spe|
|00002d50| 63 69 66 69 65 64 20 69 | 6e 20 22 68 70 65 6c 22 |cified i|n "hpel"|
|00002d60| 2e 20 20 43 61 6c 6c 65 | 64 20 62 79 20 73 6d 6f |. Calle|d by smo|
|00002d70| 6f 74 68 5f 70 61 6e 28 | 29 20 20 20 20 20 20 20 |oth_pan(|) |
|00002d80| 20 20 20 20 20 20 20 20 | 20 20 20 20 20 20 20 20 | | |
|00002d90| 20 20 20 20 20 20 2a 2f | 0d 0a 76 6f 69 64 20 73 | */|..void s|
|00002da0| 65 74 5f 70 65 6c 5f 70 | 61 6e 28 69 6e 74 20 68 |et_pel_p|an(int h|
|00002db0| 70 65 6c 29 0d 0a 7b 0d | 0a 20 20 20 20 2f 2a 20 |pel)..{.|. /* |
|00002dc0| 66 69 72 73 74 20 77 61 | 69 74 20 66 6f 72 20 65 |first wa|it for e|
|00002dd0| 6e 64 20 6f 66 20 76 65 | 72 74 69 63 61 6c 20 72 |nd of ve|rtical r|
|00002de0| 65 74 72 61 63 65 20 2a | 2f 0d 0a 20 20 20 20 77 |etrace *|/.. w|
|00002df0| 68 69 6c 65 20 28 69 6e | 70 6f 72 74 62 28 76 69 |hile (in|portb(vi|
|00002e00| 64 65 6f 2e 69 73 72 29 | 20 26 20 38 29 3b 0d 0a |deo.isr)| & 8);..|
|00002e10| 0d 0a 20 20 20 20 2f 2a | 20 77 61 69 74 20 66 6f |.. /*| wait fo|
|00002e20| 72 20 6e 65 78 74 20 76 | 65 72 74 69 63 61 6c 20 |r next v|ertical |
|00002e30| 72 65 74 72 61 63 65 20 | 2a 2f 0d 0a 20 20 20 20 |retrace |*/.. |
|00002e40| 77 68 69 6c 65 20 28 21 | 28 69 6e 70 6f 72 74 62 |while (!|(inportb|
|00002e50| 28 76 69 64 65 6f 2e 69 | 73 72 29 20 26 20 38 29 |(video.i|sr) & 8)|
|00002e60| 29 3b 0d 0a 0d 0a 20 20 | 20 20 2f 2a 20 61 64 64 |);.... | /* add|
|00002e70| 72 65 73 73 20 74 68 65 | 20 68 6f 72 69 7a 6f 6e |ress the| horizon|
|00002e80| 74 61 6c 20 70 65 6c 20 | 70 61 6e 69 6e 67 20 72 |tal pel |paning r|
|00002e90| 65 67 69 73 74 65 72 20 | 2a 2f 0d 0a 20 20 20 20 |egister |*/.. |
|00002ea0| 6f 75 74 70 6f 72 74 62 | 28 41 43 5f 49 4e 44 45 |outportb|(AC_INDE|
|00002eb0| 58 2c 20 41 43 5f 48 50 | 50 29 3b 0d 0a 20 20 20 |X, AC_HP|P);.. |
|00002ec0| 20 6f 75 74 70 6f 72 74 | 62 28 41 43 5f 49 4e 44 | outport|b(AC_IND|
|00002ed0| 45 58 2c 20 68 70 65 6c | 29 3b 0d 0a 7d 0d 0a 1a |EX, hpel|);..}...|
+--------+-------------------------+-------------------------+--------+--------+