Magnum One

home *** CD-ROM | disk | FTP | other *** search

/ Magnum One / Magnum One (Mid-American Digital) (Disc Manufacturing).iso / d12 / biosdos.arc / BIOSREF2.CRD < prev next >

Wrap

Text File | 1988-12-01 | 46.4 KB | 364 lines

SAU 11 | 12 | ┌───────────────────────────┐ | ASCII TABLE | │ INT 19 - BOOTSTRAP LOADER │ | | └───────────────────────────┘ | ╔═════╦═════╦═════╦═════╦═════╦═════╦═════╦═════╗ | | ║ 0 ║ 1 ║ 2 ║ 3 ║ 4 ║ 5 ║ 6 ║ 7 ║ | INPUT PARAMETERS: NONE | ╔═╬═════╬═════╬═════╬═════╬═════╬═════╬═════╬═════╣ | OUTPUT PARAMETERS: NONE | ║0║ NUL ║ DLE ║SPACE║ 0 ║ @ ║ P ║ ` ║ p ║ | OTHER: TRACK 0, SECTOR 1 IS LOADED INTO | ╠═╬═════╬═════╬═════╬═════╬═════╬═════╬═════╬═════╣ | ADDRESS 0:7C00 AND CONTROL IS | ║1║ SOH ║ DC1 ║ ! ║ 1 ║ A ║ Q ║ a ║ q ║ | TRANSFERRED THERE | ╠═╬═════╬═════╬═════╬═════╬═════╬═════╬═════╬═════╣ | | ║2║ STX ║ DC2 ║ " ║ 2 ║ B ║ R ║ b ║ r ║ | ┌──────────────────────────────────────────┐ | ╠═╬═════╬═════╬═════╬═════╬═════╬═════╬═════╬═════╣ | │ INT 1A - SYSTEM AND REAL TIME CLOCK BIOS │ | ║3║ ETX ║ DC3 ║ # ║ 3 ║ C ║ S ║ c ║ s ║ | └──────────────────────────────────────────┘ | ╠═╬═════╬═════╬═════╬═════╬═════╬═════╬═════╬═════╣ | | ║4║ EOT ║ DC4 ║ $ ║ 4 ║ D ║ T ║ d ║ t ║ | INPUT PARAMETERS: | ╠═╬═════╬═════╬═════╬═════╬═════╬═════╬═════╬═════╣ | | ║5║ ENQ ║ NAK ║ % ║ 5 ║ E ║ U ║ e ║ u ║ | AH = 00 - READ SYSTEM TIME COUNTER | ╠═╬═════╬═════╬═════╬═════╬═════╬═════╬═════╬═════╣ | ON EXIT: CX = HIGH PORTION OF COUNT | ║6║ ACK ║ SYN ║ & ║ 6 ║ F ║ V ║ f ║ v ║ | DX = LOW PORTION OF COUNT | ╠═╬═════╬═════╬═════╬═════╬═════╬═════╬═════╬═════╣ | AL = 0 IF 24 HOURS NOT PASSED SINCE RESET | ║7║ BEL ║ ETB ║ ' ║ 7 ║ G ║ W ║ g ║ w ║ | | ╠═╬═════╬═════╬═════╬═════╬═════╬═════╬═════╬═════╣ | AH = 01 - SET SYSTEM TIME COUNTER | ║8║ BS ║ CAN ║ ( ║ 8 ║ H ║ X ║ h ║ x ║ | CX = HIGH PORTION OF COUNT | ╠═╬═════╬═════╬═════╬═════╬═════╬═════╬═════╬═════╣ | DX = LOW PORTION OF COUNT | ║9║ HT ║ EM ║ ) ║ 9 ║ I ║ Y ║ i ║ y ║ | | ╠═╬═════╬═════╬═════╬═════╬═════╬═════╬═════╬═════╣ | AH = 02 - READ REAL TIME CLOCK TIME (PC/AT ONLY) | ║A║ LF ║ SUB ║ * ║ : ║ J ║ Z ║ j ║ z ║ | ON EXIT: CH = HOURS IN BCD | ╠═╬═════╬═════╬═════╬═════╬═════╬═════╬═════╬═════╣ | CL = MINUTES IN BCD | ║B║ VT ║ ESC ║ + ║ ; ║ K ║ [ ║ k ║ { ║ | DH = SECONDS IN BCD | ╠═╬═════╬═════╬═════╬═════╬═════╬═════╬═════╬═════╣ | DL = 1 IF DAYLIGHT SAVINGS TIME OPTION | ║C║ FF ║ FS ║ , ║ < ║ L ║ \ ║ l ║ | ║ | CY = 1 IF CLOCK NOT OPERATING | ╠═╬═════╬═════╬═════╬═════╬═════╬═════╬═════╬═════╣ | | ║D║ CR ║ GS ║ - ║ = ║ M ║ ] ║ m ║ } ║ | AH = 03 - SET REAL TIME CLOCK TIME (PC/AT ONLY) | ╠═╬═════╬═════╬═════╬═════╬═════╬═════╬═════╬═════╣ | CH = HOURS IN BCD | ║E║ SO ║ RS ║ . ║ > ║ N ║ ^ ║ n ║ ~ ║ | CL = MINUTES IN BCD | ╠═╬═════╬═════╬═════╬═════╬═════╬═════╬═════╬═════╣ | DH = SECONDS IN BCD | ║F║ SI ║ US ║ / ║ ? ║ O ║ _ ║ o ║ DEL ║ | DL = 1 IF DAYLIGHT SAVINGS TIME OPTION | ╚═╩═════╩═════╩═════╩═════╩═════╩═════╩═════╩═════╝ | | | AH = 04 - READ REAL TIME CLOCK DATE (PC/AT ONLY) | | ON EXIT: CH = CENTURY IN BCD | | CL = YEAR IN BCD | COLOR ATTRIBUTES | DH = MONTH IN BCD | | DL = DAY IN BCD | 0 - BLACK 4 - RED 8 - GRAY C - LT. RED | CY = 1 IF CLOCK NOT OPERATING | 1 - BLUE 5 - MAGENTA 9 - LT. BLUE D - LT. MAGENTA | | 2 - GREEN 6 - BROWN A - LT. GREEN E - YELLOW | AH = 05 - SET REAL TIME CLOCK DATE (PC/AT ONLY) | 3 - CYAN 7 - WHITE B - LT. CYAN F - BRIGHT WHITE | CH = CENTURY IN BCD | | CL = YEAR IN BCD | * NOTE: SET BIT 4 FOR BLINK | DH = MONTH IN BCD | | DL = DAY IN BCD | | | | AH = 06 - SET REAL TIME CLOCK ALARM (PC/AT ONLY) | | CH = HOURS IN BCD | | CL = MINUTES IN BCD | | DH = SECONDS IN BCD | | ON EXIT: | | CY = 1 IF ALARM ALREADY SET OR CLOCK INOPERABLE| | INT 4A OCCURS AT SPECIFIED ALARM TIME | | | | AH = 07 - RESET REAL TIME CLOCK ALARM | | | | AH = 08 - SET RTC ACTIVATED POWER ON MODE (CONVERTIBLE) | | CH = HOURS IN BCD | | CL = MINUTES IN BCD | | DH = SECONDS IN BCD | | | | AH = 09 - READ RTC ALARM TIME AND STATUS (CONVERTIBLE) | | ON EXIT: CH = HOURS IN BCD | | CL = MINUTES IN BCD | | DH = SECONDS IN BCD | | DL = ALARM STATUS: | | = 00 IF ALARM NOT ENABLED | | = 01 IF ALARM ENABLED BUT WILL NOT POWER | | UP SYSTEM | | = 02 IF ALARM WILL POWER UP SYSTEM | | | | AH = 80 - SET UP SOUND MULTIPLEXOR (PCjr ONLY) | | AL = 00 - SOURCE IS 8253 CHANNEL 2 | | = 01 - SOURCE IS CASSETTE INPUT | | = 02 - SOURCE IS I/O CHANNEL "AUDIO IN" | | = 03 - SOURCE IS SOUND GENERATOR CHIP | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 9 | 10 | INT 15 - SYSTEM SERVICES BIOS AH = 41 (CONTINUED) | ┌────────────────────────┐ | | │ INT 16 - KEYBOARD BIOS │ | BH = CONDITION COMPARE OR MASK VALUE | └────────────────────────┘ | BL = TIMEOUT VALUE TIMES 55 MSEC. | | = 0 IF NO TIME LIMIT | INPUT PARAMETERS: | DX = I/O PORT ADDRESS (IF AL BIT 4 = 1) | | ES:DI = POINTER TO USER BYTE (IF AL BIT 4 = 0) | AH = 00 - WAIT FOR KEYSTROKE AND READ | | ON EXIT: | AH = 42 - REQUEST SYSTEM POWER OFF (CONVERTIBLE ONLY) | AH = SCAN CODE | AL = 00 TO USE SYSTEM PROFILE | AL = ASCII CHARACTER IF APPLICABLE | = 01 TO FORCE SUSPEND REGARDLESS OF PROFILE | | | AH = 01 - GET KEYSTROKE STATUS | AH = 43 - READ SYSTEM STATUS (CONVERTIBLE ONLY) | ON EXIT: | ON EXIT: AL = STATUS: | ZF = 0 IF KEY PRESSED | ┌─┬─┬─┬─┬─┬─┬─┬─┐ | AH = SCAN CODE | │7│6│5│4│3│2│1│0│ AL | AL = ASCII CHARACTER IF APPLICABLE | └─┴─┴─┴─┴─┴─┴─┴─┘ | NOTE: CODE NOT REMOVED FROM BUFFER | │ │ │ │ │ │ │ │ | | │ │ │ │ │ │ │ └───── LCD DETACHED | AH = 02 - GET SHIFT STATUS | │ │ │ │ │ │ └─────── RESERVED | ON EXIT: | │ │ │ │ │ └───────── RS232/PARALLEL POWERED ON| ┌─┬─┬─┬─┬─┬─┬─┬─┐ | │ │ │ │ └─────────── INTERNAL MODEM POWERED ON| │7│6│5│4│3│2│1│0│ AL | │ │ │ └───────────── POWER ACTIVATED BY ALARM | └─┴─┴─┴─┴─┴─┴─┴─┘ | │ │ └─────────────── STANDBY POWER LOST | │ │ │ │ │ │ │ │ | │ └───────────────── EXTERNAL POWER IN USE | │ │ │ │ │ │ │ └───── RIGHT SHIFT KEY DEPRESSED | └─────────────────── BATTERY LOW | │ │ │ │ │ │ └─────── LEFT SHIFT KEY DEPRESSED | | │ │ │ │ │ └───────── CONTROL SHIFT KEY DEPRESSED | AH = 44 - (DE)ACTIVATE INTERNAL MODEM POWER (CONVERTIBLE)| │ │ │ │ └─────────── ALTERNATE SHIFT KEY DEPRESSED | AL = 00 TO POWER OFF | │ │ │ └───────────── SCROLL LOCK STATE ACTIVE | = 01 TO POWER ON | │ │ └─────────────── NUM LOCK STATE ACTIVE | | │ └───────────────── CAPS LOCK STATE ACTIVE | AH = 4F - KEYBOARD INTERCEPT | └─────────────────── INSERT STATE IS ACTIVE | AL = SCAN CODE, CY=1 | | ON EXIT: | AH = 04 - KEYBOARD CLICK ADJUSTMENT | AL = SCAN CODE, CY=1 IF PROCESSING DESIRED | AL = 1 FOR CLICK ON, =0 FOR CLICK OFF | | | AH = 80 - DEVICE OPEN | AH = 05 - KEYBOARD BUFFER WRITE | BX = DEVICE ID | CH = SCAN CODE | CX = PROCESS ID | CL = ASCII CHARACTER | | ON EXIT: | AH = 81 - DEVICE CLOSE | AL = 01 IF BUFFER FULL | BX = DEVICE ID | | CX = PROCESS ID | AH = 10 - EXTENDED WAIT FOR KEYSTROKE AND READ | | ON EXIT: | AH = 82 - PROGRAM TERMINATION | AH = SCAN CODE | BX = DEVICE ID | AL = ASCII CHARACTER IF APPLICABLE | | | AH = 83 - EVENT WAIT | AH = 11 - EXTENDED GET KEYSTROKE STATUS | AL = 0 TO SET INTERVAL | ON EXIT: | = 1 TO CANCEL | ZF = 0 IF KEY PRESSED | ES:BX = POINTER TO MEMORY FLAG (BIT 7 IS SET | AH = SCAN CODE | WHEN INTERVAL EXPIRES) | AL = ASCII CHARACTER IF APPLICABLE | CX,DX = NUMBER OF MICROSECONDS TO WAIT | NOTE: CODE NOT REMOVED FROM BUFFER | (GRANULARITY IS 976 MICROSECONDS) | | ON EXIT: CY = 1 IF FUNCTION ALREADY BUSY | AH = 12 - EXTENDED GET SHIFT STATUS | | ON EXIT: | AH = 84 - JOYSTICK SUPPORT | ┌─┬─┬─┬─┬─┬─┬─┬─┐ | DX = 0 TO READ THE CURRNENT SWITCH SETTINGS | │7│6│5│4│3│2│1│0│ AL | ON EXIT: AL = SWITCH SETTINGS (BITS 7-4) | └─┴─┴─┴─┴─┴─┴─┴─┘ | ON ENTRY: DX = 1 TO READ THE RESISTIVE INPUTS | │ │ │ │ │ │ │ │ | ON EXIT: AX = A(X),BX = A(Y), CX = B(X), DX = B(Y) | │ │ │ │ │ │ │ └───── RIGHT SHIFT KEY DEPRESSED | | │ │ │ │ │ │ └─────── LEFT SHIFT KEY DEPRESSED | AH = 85 - SYSTEM REQUEST KEY PRESSED | │ │ │ │ │ └───────── CONTROL SHIFT KEY DEPRESSED | AL = 00 MAKE OF KEY | │ │ │ │ └─────────── ALTERNATE SHIFT KEY DEPRESSED | = 01 BREAK OF KEY | │ │ │ └───────────── SCROLL LOCK STATE ACTIVE | | │ │ └─────────────── NUM LOCK STATE ACTIVE | AH = 86 - ELAPSED TIME WAIT (PCAT AND AFTER) | │ └───────────────── CAPS LOCK STATE ACTIVE | CL,DX = NUMBER OF MICROSECONDS TO WAIT | └─────────────────── INSERT STATE IS ACTIVE | | | AH = 87 - MOVE BLOCK TO/FROM EXTENDED MEMORY | ┌─┬─┬─┬─┬─┬─┬─┬─┐ | CX = WORD COUNT OF BLOCK TO BE MOVED | │7│6│5│4│3│2│1│0│ AH | ES:SI = POINTER TO GLOBAL DESCRIPTOR TABLE | └─┴─┴─┴─┴─┴─┴─┴─┘ | | │ │ │ │ │ │ │ │ | AH = 88 - EXTENDED MEMORY SIZE DETERMINE | │ │ │ │ │ │ │ └───── LEFT CONTROL KEY PRESSED | ON EXIT: AX = NUMBER OF CONTIGUOUS 1K BLOCKS OF | │ │ │ │ │ │ └─────── LEFT ALT KEY DEPRESSED | MEMORY STARTING AT ADDRESS 1024K | │ │ │ │ │ └───────── RIGHT CONTROL KEY PRESSED | | │ │ │ │ └─────────── RIGHT ALT KEY DEPRESSED | AH = 89 - SWITCH PROCESSOR TO PROTECTED MODE | │ │ │ └───────────── SCROLL LOCK KEY DEPRESSED | ES:SI = POINTER TO GDT | │ │ └─────────────── NUM LOCK KEY DEPRESSED | BH = OFFSET INTO IDT WHERE INTS 0-7 ARE | │ └───────────────── CAPS LOCK KEY DEPRESSED | BL = OFFSET INTO IDT WHERE INTS 8-15 ARE | └─────────────────── SYSTEM REQUEST KEY DEPRESSED | | | AH = 90 - DEVICE BUSY | ┌───────────────────────┐ | AL = TYPE CODE: | │ INT 17 - PRINTER BIOS │ | = 00 - DISK | └───────────────────────┘ | = 01 - DISKETTE | | = 02 - KEYBOARD | AH = 00 - PRINT CHARACTER | = 80 - NETWORK (ES:BX = NCB) | AL = CHARACTER TO PRINT | = FC - DISK RESET | DX = PRINTER TO BE USED (0,1,2) | = FD - DISKETTE MOTOR START | ON EXIT: | = FE - PRINTER | AH = STATUS | ON EXIT: CY = 1 IF WAIT TIME SATISFIED | | | AH = 01 - INITIALIZE THE PRINTER PORT | AH = 91 - INTERRUPT COMPLETE | DX = PRINTER PORT TO BE INITIALIZED (0,1,2)| AL = TYPE CODE (SEE AH=90 ABOVE) | ON EXIT: | | AH = STATUS | AH = C0 - RETURN SYSTEM CONFIGURATION PARAMETERS | | ON EXIT: ES:BX = POINTER TO SYSTEM DESCRIPTOR: | AH = 02 - READ PRINTER PORT STATUS | WORD - LENGTH OF DESCRIPTOR | DX = PRINTER PORT TO BE USED (0,1,2) | BYTE - MODEL BYTE | ON EXIT: | BYTE - SECONDARY MODEL BYTE | AH = STATUS | BYTE - BIOS REVISION LEVEL | | BYTE - FEATURE INFORMATION: | ┌─┬─┬─┬─┬─┬─┬─┬─┐ | ┌─┬─┬─┬─┬─┬─┬─┬─┐ | │7│6│5│4│3│2│1│0│ PRINTER STATUS BITS | │7│6│5│4│3│2│1│0│ FEATURE BYTE | └─┴─┴─┴─┴─┴─┴─┴─┘ | └─┴─┴─┴─┴─┴─┴─┴─┘ | │ │ │ │ │ │ │ │ | │ │ │ │ │ │ │ │ | │ │ │ │ │ │ │ └───── TIME OUT | │ │ │ │ └─┴─┴─┴───── RESERVED | │ │ │ │ │ └─┴─────── NOT USED | │ │ │ └───────────── INT 15 AH=4F USED| │ │ │ │ └─────────── I/O ERROR | │ │ └─────────────── RTC PRESENT | │ │ │ └───────────── SELECTED | │ └───────────────── 2ND 8259 PRESENT | │ │ └─────────────── OUT OF PAPER | └─────────────────── DMA CHAN. 3 USED | │ └───────────────── ACKNOWLEDGE | | └─────────────────── NOT BUSY | | | | | | | | | | | 7 | 8 | INT 13 - FIXED DISK BIOS (CONTINUED) | INT 14 - ASYNCHRONOUS COMMUNICATIONS BIOS (CONTINUED) | | | AH = 0A - READ LONG | AH = 01 - SEND CHARACTER IN AL | ON EXIT: AL = NUMBER OF SECTORS ACTUALLY TRANSFERRED | ON EXIT: AH = LINE STATUS | | | AH = 0B - WRITE LONG | AH = 02 - RECEIVE CHARACTER IN AL | ON EXIT: AL = NUMBER OF SECTORS ACTUALLY TRANSFERRED | ON EXIT: AH = LINE STATUS | | | AH = 0C - SEEK | AH = 03 - READ STATUS | | ON EXIT: AH = LINE STATUS | AH = 0D - ALTERNATE DISK RESET | AL = MODEM STATUS | | | AH = 0E - READ SECTOR BUFFER (XT, PORTABLE ONLY) | AH = 04 - EXTENDED INITIALIZE | ON EXIT: AL = NUMBER OF SECTORS ACTUALLY TRANSFERRED | AL = BREAK STATUS | | = 1 IF BREAK | AH = 0F - WRITE SECTOR BUFFER (XT, PORTABLE ONLY) | = 0 IF NO BREAK | ON EXIT: AL = NUMBER OF SECTORS ACTUALLY TRANSFERRED | BH = PARITY | | = 0 - NO PARITY | AH = 10 - TEST DRIVE READY | = 1 - ODD PARITY | | = 2 - EVEN PARITY | AH = 11 - RECALIBRATE | = 3 - STICK PARITY ODD | | = 4 - STICK PARITY EVEN | AH = 12 - CONTROLLER RAM DIAGNOSTIC (XT, PORTABLE ONLY) | BL = NUMBER OF STOP BITS | | = 0 - ONE STOP BIT | AH = 13 - DRIVE DIAGNOSTIC (XT, PORTABLE ONLY) | = 1 - 2 STOP BITS (1½ IF 5 BIT WORD LEN)| | CH = WORD LENGTH | AH = 14 - CONTROLLER INTERNAL DIAGNOSTIC | = 0 - 5 BITS | | = 1 - 6 BITS | AH = 15 - READ DASD TYPE (PC/AT ONLY) | = 2 - 7 BITS | ON EXIT: AH = 00 IF DRIVE NOT PRESENT | = 3 - 8 BITS | = 03 IF FIXED DISK PRESENT | CL = BAUD RATE | CX,DX = NUMBER OF 512 BYTE BLOCKS | = 0 - 110 | | = 1 - 150 | AH = 16 - RESERVED FOR DISKETTE | = 2 - 300 | | = 3 - 600 | AH = 17 - RESERVED FOR DISKETTE | = 4 - 1200 | | = 5 - 2400 | AH = 18 - RESERVED FOR DISKETTE | = 6 - 4800 | | = 7 - 9600 | AH = 19 - PARK FIXED DISK HEADS (XT MODEL 286) | = 8 - 19200 | | ON EXIT: | | AL = MODEM STATUS | ┌───────────────────────────────────────────┐ | AH = LINE CONTROL STATUS | │ INT 14 - ASYNCHRONOUS COMMUNICATIONS BIOS │ | | └───────────────────────────────────────────┘ | AH = 05 - EXTENDED COMMUNICATION PORT CONTROL | | AL = 00 - READ MODEM CONTROL REGISTER | FOR INT 14 THE FOLLOWING STATUS IS DEFINED: | BL = MODEM CONTROL REG (SEE AL=1)| | AL = 01 - WRITE MODEM CONTROL REGISTER | ┌─┬─┬─┬─┬─┬─┬─┬─┐ | BL = MODEM CONTRO REGISTER: | │7│6│5│4│3│2│1│0│ MODEM STATUS | ┌─┬─┬─┬─┬─┬─┬─┬─┐ | └─┴─┴─┴─┴─┴─┴─┴─┘ | │7│6│5│4│3│2│1│0│ BL (FOR AL=00 AND AL=01) | │ │ │ │ │ │ │ │ | └─┴─┴─┴─┴─┴─┴─┴─┘ | │ │ │ │ │ │ │ └───── DELTA CLEAR TO SEND | │ │ │ │ │ │ │ │ | │ │ │ │ │ │ └─────── DELTA DATA SET READY | │ │ │ │ │ │ │ └───── DATA TERMINAL READY | │ │ │ │ │ └───────── TRAILING EDGE RING DETECTOR | │ │ │ │ │ │ └─────── REQUEST TO SEND | │ │ │ │ └─────────── DELTA RECEIVE LINE SIGNAL DET.| │ │ │ │ │ └───────── OUT1 | │ │ │ └───────────── CLEAR TO SEND | │ │ │ │ └─────────── OUT2 | │ │ └─────────────── DATA SET READY | │ │ │ └───────────── LOOP | │ └───────────────── RING INDICATOR | └─┴─┴─────────────── RESERVED | └─────────────────── RECEIVE LINE SIGNAL DETECT | ON EXIT: | | AH = STATUS | ┌─┬─┬─┬─┬─┬─┬─┬─┐ | | │7│6│5│4│3│2│1│0│ LINE STATUS | | └─┴─┴─┴─┴─┴─┴─┴─┘ | ┌───────────────────────────────┐ | │ │ │ │ │ │ │ │ | │ INT 15 - SYSTEM SERVICES BIOS │ | │ │ │ │ │ │ │ └───── DATA READY | └───────────────────────────────┘ | │ │ │ │ │ │ └─────── OVERRUN ERROR | | │ │ │ │ │ └───────── PARITY ERROR | INPUT PARAMETERS: | │ │ │ │ └─────────── FRAMING ERROR | | │ │ │ └───────────── BREAK DETECT | AH = 00 - TURN CASSETTE MOTOR ON (PC,PCjr ONLY) | │ │ └─────────────── TRANSMIT HOLDING REG. EMPTY | | │ └───────────────── TRANSMIT SHIFT REGISTER EMPTY | AH = 01 - TURN CASSETTE MOTOR OFF (PC,PCjr ONLY) | └─────────────────── TIME OUT * | | | AH = 02 - READ BLOCKS FROM CASETTE (PC,PCjr ONLY) | * NOTE: IF BIT 7 SET THEN OTHER BITS ARE INVALID | ES:BX = OFFSET OF DATA BUFFER | | CX = COUNT OF BYTES TO READ | ALL ROUTINES HAVE AH=FUNCTION NUMBER AND DX=RS232 CARD | ON EXIT: | NUMBER (0 BASED). AL=CHARACTER TO SEND OR RECEIVED | ES:BX = OFFSET OF LAST BYTE READ+1 | CHARACTER ON EXIT, UNLESS OTHERWISE NOTED. | DX = COUNT OF BYTES ACTUALLY READ | | AH = ERROR CODE IF CY=1 | AH = 00 - INITIALIZE COMMUNICATIONS PORT | | AL = PARMS FOR INITIALIZATION: | AH = 03 - WRITE BLOCKS TO CASETTE (PC,PCjr ONLY) | ┌─┬─┬─┬─┬─┬─┬─┬─┐ | ES:BX = OFFSET OF DATA BUFFER | │7│6│5│4│3│2│1│0│ AL | CX = COUNT OF BYTES TO WRITE | └─┴─┴─┴─┴─┴─┴─┴─┘ | ON EXIT: | │ │ │ │ │ │ │ │ | ES:BX = OFFSET OF LAST BYTE WRITTEN+1 | │ │ │ │ │ │ └─┴───── WORD LENGTH | AH = ERROR CODE IF CY=1 | │ │ │ │ │ └───────── STOP BITS | | │ │ │ └─┴─────────── PARITY | AH = 40 - READ / MODIFY PROFILES (CONVERTIBLE ONLY) | └─┴─┴─────────────── BAUD RATE | AL = 00 - RETURN SYSTEM PROFILE IN CX,BX | | AL = 01 - MODIFY SYSTEM PROFILE | WORD LENGTH: 10 = 7 BITS | CX,BX = PROFILE INFO | 11 = 8 BITS | AL = 02 - RET. INTERNAL MODEM PROFILE IN BX| | AL = 03 - MODIFY INTERNAL MODEM PROFILE | STOP BITS: 0 = 1 STOP BIT | BX = PROFILE INFO | 1 = 2 STOP BITS | | | AH = 41 - WAIT ON EXTERNAL EVENT (CONVERTIBLE ONLY) | PARITY: X0 = NONE | AL = CONDITION TYPE: | 01 = ODD | ┌─┬─┬─┬─┬─┬─┬─┬─┐ | 11 = EVEN | │7│6│5│4│3│2│1│0│ AL | | └─┴─┴─┴─┴─┴─┴─┴─┘ | BAUD RATE:000 = 110 BAUD | │ │ │ │ │ │ │ │ | 001 = 150 BAUD | │ │ │ │ │ └─┴─┴───── CONDITION TO WAIT FOR | 010 = 300 BAUD | │ │ │ │ └─────────── RESERVED | 011 = 600 BAUD | │ │ │ └───────────── 1=PORT ADDR./0=USER BYTE | 100 = 1200 BAUD | └─┴─┴─────────────── RESERVED | 101 = 2400 BAUD | | 110 = 4800 BAUD | CONDITION CODES: | 111 = 9600 BAUD | | | 0 = ANY EXTERNAL EVENT | ON EXIT: AL = MODEM STATUS | 1 = COMPARE AND RETURN IF EQUAL | AH = LINE STATUS | 2 = COMPARE AND RETURN IF NOT EQUAL | | 3 = TEST AND RETURN IF NOT ZERO | | 4 = TEST AND RETURN IF ZERO | | | CONTINUED ON NEXT PANEL | | | CONTINUED ON NEXT PANEL | | |