ProfitPress Mega CDROM2 Shareware Freeware (MSDOS)(1992)(Eng)

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Assembly Source File | 1990-04-10 | 49.0 KB | 2,515 lines

; «PL1» ; ; Assembly routines for BYTE benchmarks ; This is the heart of all of the routines. ; ;General equates TRUE equ 1 FALSE equ 0 ;Equates for timer routine BIOS_TIME_LO equ 006ch BIOS_DATASEG equ 0040h TIMER_MODE equ 43h TIMER0 equ 40h MAX_COUNT equ 0ffffh DOSSEG .MODEL small FDATA SEGMENT DWORD PUBLIC FAC1 DQ 3.0E0 FAC2 DQ 2.0E0 FAC3 DQ 5.050E0 FAC4 DQ 5.050E0 FRESULT DQ ? FDATA ENDS .DATA ;Definitions for high-resolution timer. count_low dw 0 ;number of interrupt tics count_micro dw 0 ;calc. from interrrupt tics count_milli dw 0 ;calc. from interrrupt tics timer_micro dw 0 ;final value timer_milli dw 0 ; " timer_sec dw 0 ; " svd_8253_count dw 0 ;storage space timer_convert dw 8381 ;838.096 nsec per tick count_convert dw 54926 ;54.925 mill-sec per count ten_thousand dw 10000 five_thousand dw 5000 thousand dw 1000 extrn _timeradjust:word ;timer adjustment value extrn _machine_config: BYTE coproc equ word ptr _machine_config+6 ;Definitions for floating-point INDEFINITE DD 0FFC00000R ;Indefinite value IOMEGA DQ ? ;Holds value of i omega FSTATUS DW ? ;Holds status field STARTX DQ ? ;For trapezoid MINUS2 DD -2.0 ;Guess PIDIV2 DT 1.5707963267948966192 ;pi/2 ;Definitions for 8087 CW_87 RECORD RES871:3,INF:1,RND:2,PRECC:2,ERRE:1,RES872:1,PRECM:1,UNFM:1,OVFM:1,ZDM:1,DNM:1,INVM:1 SW_87 RECORD BUSY:1,COND3:1,TOP:3,COND2:1,COND1:1,COND0:1,ERRP:1,RES873:1,PRCE:1,UNFE:1,OVFE:1,ZDE:1,DNE:1,INVE:1 ;Definitions for EMS routines HANDLE1 DW ? ;Storage for first handle HANDLE2 DW ? ;Storage for second handle ;Configuration stuff for Hercules mode CRTCP DB 00H,35H ;54 chars horizontal DB 01,2DH ;45 displayed DB 02,2EH ;Sync at 46th char DB 03,07H ;Sync width 7 char clocks DB 4,5BH ;Vert total of 92 characters DB 05,02H ;Vert adjust of 2 scan lines DB 06,57H ;Vert displayed of 87 char rows DB 07,57H ;Vert. sync after 87th char row DB 09,03H ;Max scan line, 4 scan lines per char BDATA DB 7 ;CRT_MODE DW 80 ;CRT_COLS DW 8000H ;CRT_LEN DW 0 ;CRT_START DW 8 DUP (0) ;CURSOR_POSN DW 0 ;CURSOR_MODE DB 0 ;ACTIVE_PAGE DW 3B4H ;ADDR_6845 CRTMD DB 0AH ;CRT_MODE_SET DB 0 ;PALLETTE BDLEN EQU $-BDATA .CODE ;**************************** ; do_sieve * ;**************************** ; This routine is called from C with the following ; int do_sieve(flagseg,size); ; flagseg is the segment holding the flags array ; size is the size of the flags array ; The routine returns the number of primes found PUBLIC _do_sieve FLAGSEG equ [BP+4] SSIZE equ [BP+6] _do_sieve PROC NEAR ;Save registers PUSH BP MOV BP,SP PUSH BX PUSH CX PUSH DX PUSH SI PUSH DI PUSH DS PUSH ES ;Clear count XOR DX,DX ;Set up DS and ES to point to flags segment MOV AX,FLAGSEG MOV DS,AX MOV ES,AX ;Set all flags to true XOR DI,DI MOV CX,SSIZE MOV AL,TRUE REP STOSB ;Do the main loop XOR SI,SI ;i=0 DS1: CMP SI,SSIZE ;for(i=0;i<=size;...) JG DS5 CMP BYTE PTR [SI],TRUE ;if(flags[i]) JNZ DS4A MOV BX,SI ADD BX,SI ADD BX,3 ;prime=i+i+3 ;Inner loop MOV DI,BX ADD DI,SI ;k=i+prime DS3: CMP DI,SSIZE ;k<=size JG DS4 MOV BYTE PTR [DI],FALSE ADD DI,BX ;k+=prime JMP DS3 DS4: INC DX ;count++ DS4A: INC SI ;...i++) JMP DS1 DS5: MOV AX,DX ;Return count ;Restore POP ES POP DS POP DI POP SI POP DX POP CX POP BX POP BP RET _do_sieve ENDP ;**************************** ; do_shell * ;**************************** ; This routine performs the shell-sort on an integer array. ; Call with: ; do_shell(arrayseg,top) ; arrayseg is segment address of array to sort ; top is the maximum number of elements in the array ; NOTE: The array to sort MUST begin on a segment boundary. PUBLIC _do_shell SHARRAYSEG equ [BP+4] SHTOP equ [BP+6] _do_shell PROC NEAR ;Save registers PUSH BP MOV BP,SP PUSH BX PUSH DX PUSH SI PUSH DI PUSH DS ;Set up data segment MOV AX,SHARRAYSEG MOV DS,AX ;Calculate the gap MOV BX,SHTOP ;gap=(top-bot)/2 SHR BX,1 ; SHS1: MOV DL,1 ;nex=1 XOR DI,DI ;for(i=0... SHS2: MOV AX,SHTOP SUB AX,BX SHL AX,1 ;Word boundary CMP DI,AX ;...;i<=top-gap JG SHS3 MOV SI,DI ADD SI,BX ;Word boundary ADD SI,BX MOV AX,[SI] CMP AX,[DI] JGE SHS2A MOV AX,[SI] ;exchange elements XCHG AX,[DI] MOV [SI],AX XOR DL,DL ;Swap has occurred SHS2A: INC DI INC DI ;++i JMP SHS2 SHS3: OR DL,DL JZ SHS1 ; SHR BX,1 ;gap=gap/2 JNZ SHS1 ;while(gap!=0) ;Restore POP DS POP DI POP SI POP DX POP BX POP BP RET _do_shell ENDP ;**************************** ; do_qsort * ;**************************** ; This routine performs the quicksort algorithm on an integer array. ; Call with: ; do_qsort(arrayseg,bot,top) ; arrayseg is the segment of the array to sort ; bot is to lowest element in the partition ; top is the highest element in the partition QSTOP equ [BP+8] QSBOT equ [BP+6] QSARRAYSEG equ [BP+4] PUBLIC _do_qsort _do_qsort PROC NEAR ;Set up the stack PUSH BP MOV BP,SP PUSH DX PUSH SI PUSH DI PUSH DS ;Point DS register properly MOV AX,QSARRAYSEG MOV DS,AX ;while(bot<top) QS0: MOV AX,QSBOT CMP AX,QSTOP JGE QS6 ;Set ranges and choose partitioning element MOV SI,AX ;SI holds i SHL SI,1 ;Word align MOV DI,QSTOP ;DI holds j SHL DI,1 ;Word align MOV DX,[SI] ;temp=array[bot] ;Partition array QS1: CMP SI,DI ;while(i<j) JGE QS5A QS2: CMP [DI],DX ;while(array[j]>temp) JLE QS3 DEC DI ;j-=1 DEC DI ;(Word aligned) JMP QS2 QS3: MOV AX,[DI] ;array[i]=array[j] MOV [SI],AX QS4: CMP SI,DI ;while((i<j) && ... JGE QS5 CMP [SI],DX ;...(array[i]<=temp)) JG QS5 INC SI ;i+=1 INC SI ;(Word aligned) JMP QS4 QS5: MOV AX,[SI] ;array[j]=array[i] MOV [DI],AX JMP QS1 QS5A: MOV [SI],DX ;array[i]=temp ;Call qsort recursively MOV AX,SI SHR AX,1 ;Back to non-word alignment DEC AX PUSH AX MOV AX,QSBOT PUSH AX PUSH DS CALL _do_qsort ADD SP,6 ;Clear stack SHR SI,1 ;bot=i+1 INC SI MOV QSBOT,SI JMP QS0 QS6: POP DS ;Restore POP DI POP SI POP DX POP BP RET _do_qsort ENDP ;**************************** ; do_bmove * ;**************************** ; Byte-wide move ; Call with: ; do_bmove(seg1,off1,seg2,off2,nbytes) ; seg1,off1 = segment/offset of source ; seg2,off2 = segment/offset of destination ; nbytes = unsigned count of number of bytes to move PUBLIC _do_bmove _do_bmove PROC NEAR SEG1 equ [BP+4] OFF1 equ [BP+6] SEG2 equ [BP+8] OFF2 equ [BP+10] NBYTES equ [BP+12] ;Save everything PUSH BP MOV BP,SP PUSH CX PUSH SI PUSH DI PUSH DS PUSH ES ;Load up the registers MOV AX,SEG1 MOV DS,AX MOV AX,SEG2 MOV ES,AX MOV SI,OFF1 MOV DI,OFF2 MOV CX,NBYTES CLD REP MOVSB ;Restore and return POP ES POP DS POP DI POP SI POP CX POP BP RET _do_bmove ENDP ;**************************** ; do_wmove * ;**************************** ; Word-wide move ; Call with: ; do_bmove(seg1,off1,seg2,off2,nwords) ; seg1,off1 = segment/offset of source ; seg2,off2 = segment/offset of destination ; nwords = unsigned count of number of words to move PUBLIC _do_wmove _do_wmove PROC NEAR SEG1 equ [BP+4] OFF1 equ [BP+6] SEG2 equ [BP+8] OFF2 equ [BP+10] NWORDS equ [BP+12] ;Save everything PUSH BP MOV BP,SP PUSH CX PUSH SI PUSH DI PUSH DS PUSH ES ;Load up the registers MOV AX,SEG1 MOV DS,AX MOV AX,SEG2 MOV ES,AX MOV SI,OFF1 MOV DI,OFF2 MOV CX,NWORDS CLD REP MOVSW ;Restore and return POP ES POP DS POP DI POP SI POP CX POP BP RET _do_wmove ENDP ;**************************** ; do_dmove * ;**************************** ; do_dmove(seg1,off1,seg1,off2,ndwords PUBLIC _do_dmove _do_dmove PROC NEAR SEG1 equ [BP+4] OFF1 equ [BP+6] SEG2 equ [BP+8] OFF2 equ [BP+10] NDWORDS equ [BP+12] PUSH BP MOV BP,SP PUSH CX PUSH SI PUSH DI PUSH DS PUSH ES ;Set up segments MOV AX,SEG1 MOV DS,AX MOV AX,SEG2 MOV ES,AX .386 XOR ESI,ESI XOR EDI,EDI XOR ECX,ECX MOV SI,OFF1 MOV DI,OFF2 MOV CX,NDWORDS CLD REP MOVSD .8086 ;Restore and return POP ES POP DS POP DI POP SI POP CX POP BP RET _do_dmove ENDP ;**************************** ; do_ifourbang * ;**************************** ; do_ifourbang(ifacseg,numvals) PUBLIC _do_ifourbang _do_ifourbang PROC NEAR IFACSEG equ [BP+4] NUMVALS equ [BP+6] PUSH BP MOV BP,SP PUSH BX PUSH CX PUSH SI PUSH DS ;Load up registers MOV AX,IFACSEG MOV DS,AX MOV CX,NUMVALS ;Start the loop XOR SI,SI MOV BX,8 XOR AX,AX IFB1: ADD AX,[SI] SUB AX,[SI+2] IMUL WORD PTR [SI+4] IDIV WORD PTR [SI+6] ADD SI,BX LOOP IFB1 ;Go home POP DS POP SI POP CX POP BX POP BP RET _do_ifourbang ENDP .8087 ;**************************** ; init_fpu * ;**************************** ; Initialize FPU PUBLIC _init_fpu _init_fpu PROC NEAR FINIT RET _init_fpu ENDP ;**************************** ; do_fourbang * ;**************************** ; This routine performs the floating-point "four-banger" test. ; Call with: ; do_fourbang(iterations) ; uint iterations ; Where: ; Iterations is the number of times to repeat the loop PUBLIC _do_fourbang NFOURBANGS equ [BP+4] _do_fourbang PROC NEAR PUSH BP MOV BP,SP ;See what kind of coprocessor MOV AX, coproc PUSH DS ;Swap segment MOV BX,FDATA MOV DS,BX CMP AX,1 JG FNLP ;Do no-waits ASSUME DS:FDATA ;Initialize the result field FLDZ FSTP QWORD PTR FRESULT ;Load loop count MOV CX,NFOURBANGS ;Do the loops FLP1: FLD QWORD PTR FRESULT FLD QWORD PTR FAC1 FADD FLD QWORD PTR FAC2 FSUB FLD QWORD PTR FAC3 FMUL FLD QWORD PTR FAC4 FDIV FSTP QWORD PTR FRESULT LOOP FLP1 ;Return POP DS POP BP RET .387 FNLP: FLDZ FSTP QWORD PTR FRESULT MOV CX,NFOURBANGS EVEN FNLP1: FLD QWORD PTR FRESULT FLD QWORD PTR FAC1 FADD FLD QWORD PTR FAC2 FSUB FLD QWORD PTR FAC3 FMUL FLD QWORD PTR FAC4 FDIV FSTP QWORD PTR FRESULT LOOP FNLP1 POP DS POP BP RET _do_fourbang ENDP .8087 ASSUME DS:_DATA ;**************************** ; square_fourier * ;**************************** ; Fourier series for a square wave of period 2 ; Call with: ; square_fourier(ncoeff,coeffarray) ; ncoeff = number of coefficients ; coeffarray = array of doubles holding results ; NOte that since the period is 2, omega is 2*pi/period = pi. ; Knowing this, we advance the i*omega by simply adding pi ; to that variable on each pass. ; Hey, it works. STEPSIZE equ 501 PUBLIC _square_fourier NCOEFF equ [BP+4] COEFFARRAY equ [BP+6] _square_fourier PROC NEAR PUSH BP MOV BP,SP PUSH SI MOV CX,NCOEFF ;Get # of coefficients MOV SI,COEFFARRAY ;Pointer to array ;First calculate a0 PUSH CX MOV CX,STEPSIZE ;Stepsize MOV BX,OFFSET square_wave FLD1 FLD1 FADD ;Upper integration limit FLDZ ;Lover limit CALL do_trapezoid ;Integrate FLD1 FLD1 FADD FDIV ;Result/2 = a0 FSTP QWORD PTR [SI] ;Save a0 ADD SI,4 ;Bump pointer POP CX ;Set up iw (i omega) FLDPI FSTP QWORD PTR IOMEGA ;Calculate remaining a(i) coefficients SQF1: PUSH CX ;Save loop counter MOV CX,STEPSIZE ;Stepsize MOV BX,OFFSET square_cosine FLD1 FLD1 FADD ;Upper limit FLDZ ;Lower limit CALL do_trapezoid FSTP QWORD PTR [SI] ;Store a(i) coefficient ADD SI,4 ;Bump pointer ;Calculate remaining b(i) coefficients MOV CX,STEPSIZE ;Intervals MOV BX,OFFSET square_sine FLD1 FLD1 FADD ;Upper limit FLDZ ;Lower limit CALL do_trapezoid FSTP QWORD PTR [SI] ;Store b(i) coefficient ADD SI,4 ;Incremenmt iomega FLDPI FADD QWORD PTR IOMEGA FSTP QWORD PTR IOMEGA ;See if the loop is finished POP CX LOOP SQF1 ;All done - restore POP SI POP BP RET _square_fourier ENDP ;**************************** ; square_wave * ;**************************** ; A square wave of period 2. Valid from x=0.0 to x<2.0 ; Wave amplitude is +1/-1 ; On entry: ; ST(0)=x ; On exit ; ST(0)=f(x) square_wave: FLD1 ;Get a 1.0 on top FCOM ;See where x is FSTSW FSTATUS FWAIT MOV AX,FSTATUS AND AH,01000101B ;Get condition bits FSTP ST(1) ;Discard x CMP AH,1 JNE SQC2 ;x>1 - return a -1 FCHS ;1.0 is now -1.0 SQC2: RET ;**************************** ; square_cosine * ;**************************** ; Returns cosine component for fourier series. ; On entry: ; ST(0) = x ; IOMEGA = iw ; On exit: ; ST(0) = f(x) * cos(iwx) ; Where f(x) is a square wave of period 2. square_cosine: FLD ST(0) ;Dup x FMUL QWORD PTR IOMEGA ;iw * x CALL calc_cosine ;Get cosine of ST(0) SQC1: FXCH ;Swap CALL square_wave ;Get f(x) on top FMUL ;f(x) * cos(iwx) RET ;**************************** ; square_sine * ;**************************** ; On entry: ; ST(0) = x ; IOMEGA = iw ; On exit: ; ST(0) = f(x) * sin(iwx) ; Where f(x) is a square wave of period 2. square_sine: FLD ST(0) ;Dup x FMUL QWORD PTR IOMEGA ;iw * x CALL calc_sine ;sin(iwx) JMP SQC1 ;Link to common code ;**************************** ; do_trapezoid * ;**************************** ; On entry: ; CX = number of intervals for integration ; BX = pointer to routine that will push the value of f(x) ; on the FPU stack. x will be stored in ST(0). ; ST(0) = Lower limit of integration ; ST(1) = upper limit of integration ; On exit: ; ST(0) holds value of integration formula do_trapezoid PROC NEAR ;Save the starting value of x FST QWORD PTR STARTX ;Calculate the increment width FSUB ;top - bottom MOV FSTATUS,CX ;Borrow FSTATUS field FILD WORD PTR FSTATUS ;Get n (number of intervals) FDIV ;dx=(top-bottom)/n ;Get f(bottom) FLD QWORD PTR STARTX CALL BX ;Call f(x) FLD1 FADD ST(0),ST ;Calculate 2.0 FDIV ;f(x0)/2 FXCH ST(1) ;-- f(x0)/2 dx FLD QWORD PTR STARTX ; -- f(x0)/2 dx x ; Stack is now x, dx, f(x0)/2 ; Begin the loop DEC CX FINTEG1: FADD ST,ST(1) ;x'=x+dx FLD ST(0) ;DUP x' CALL BX ;Get f(x') FADDP ST(3),ST ;Accumulate and pop f(x) LOOP FINTEG1 ;Calculate f(x)/2 x=endpoint FADD ST,ST(1) CALL BX FLD1 FADD ST(0),ST FDIV ;Divide by 2 FADDP ST(2),ST ;Accumulate FMUL ;Times dx ;Return RET do_trapezoid ENDP ;**************************** ; calc_cosine * ;**************************** ; On entry: ; x is stored in ST(0) ; On exit ; cosine(x) is stored in ST(0) ; This routine uses the identities: ; cos(x) = cos(x + pi/2) ; cos(x) = cos(|x|) calc_cosine: FLD PIDIV2 ;Load pi/2 FADDP ST(1),ST(0) ;Add to x FABS ;Take absolute value CALL calc_sine RET ;**************************** ; calc_sine * ;**************************** ; On entry: ; x is stored in ST(0) ; On exit ; sine(x) is stored in ST(0). ; NOTE: This routine is based on the floating-point routines ; found in the public-domain FORTH system ABUNDANCE. calc_sine: MOV AX,coproc CMP AX,3 ;80387? JNZ CSIN0 JMP SIN387 CSIN0: PUSH BX PUSH CX PUSH DX XOR DX,DX ;Clear DX FTST FSTSW FSTATUS ;Store status word FWAIT MOV AX,FSTATUS SAHF ;Status in flags JAE CSIN1 MOV DL,0FFH ;Indicate negative FABS ;Set ST(0) between 0 and pi/4 CSIN1: FLD DWORD PTR MINUS2 FLDPI FSCALE FSTP ST(1) FXCH ST(1) CSIN2: FPREM FSTSW FSTATUS FWAIT MOV AX,FSTATUS SAHF JP CSIN2 ;Jump if C2!=0 FTST FSTSW FSTATUS FWAIT XOR BX,BX AND FSTATUS,4100H MOV CX,FSTATUS CMP CH,40H JNZ CSIN3 DEC BX ;BX=-1 CSIN3: TEST AH,2 JNZ CSIN5 FSTP ST(1) OR BX,BX JZ CSIN4 FSTP ST(0) FLDZ FLD1 JMP CSIN7 CSIN4: FPTAN JMP CSIN7 CSIN5: OR BX,BX JNZ CSIN6 FSUBP ST(1),ST(0) FPTAN JMP CSIN7 CSIN6: FSTP ST(0) FSTP ST(0) FLD1 FLD1 CSIN7: XOR BX,BX TEST AH,40H JZ CSIN8 INC BX ;BX=1 CSIN8: TEST AH,2 JZ CSIN9 XOR BX,1 JMP CSIN10 CSIN9: CSIN10: CMP BX,1 JNZ CSIN11 FXCH ST(1) CSIN11: FMUL ST(0),ST(0) FLD ST(1) FMUL ST(0),ST(0) FADDP ST(1),ST(0) FSQRT FDIVP ST(1),ST(0) TEST AH,1 JZ CSIN12 NOT DL CSIN12: OR DL,DH JZ CSIN13 FCHS CSIN13: POP DX POP CX POP BX RET .387 ;************************************** ; sine387 * ;************************************** ; Sine routine for 80387 sin387: FSIN ; FSTP ST(0) RET ;************************************** ; GRAPHICS BENCHMARKS * ;************************************** ;************************************** ; random_text * ;************************************** ; Call with: ; random_text(rcseg,attrseg,n,vpage) ; Where: ; rcseg = points to array containing row,col coordinate ; pairs (column in lo byte, row in high) ; attrseg = points to array containing attribute ; bytes ; nbytes = number of entries ; vpage = video page address PUBLIC _random_text RTEXTRCSEG equ [BP+4] RTEXTATTRSEG equ [BP+6] RTEXTN equ [BP+8] RTEXTVPAGE equ [BP+10] _random_text PROC NEAR PUSH BP MOV BP,SP PUSH BX PUSH CX PUSH DX PUSH SI PUSH DI PUSH DS PUSH ES ; Load up segment registers MOV AX,RTEXTRCSEG MOV DS,AX XOR SI,SI MOV AX,RTEXTATTRSEG MOV ES,AX XOR DI,DI ;Set count and video page MOV CX,RTEXTN MOV BX,RTEXTVPAGE MOV BH,BL ;Initialize character MOV AL,'A' ;Do it RTXT1: PUSH CX MOV DX,[SI] MOV AH,02H PUSH AX INT 10H ;Position cursor POP AX MOV BL,ES:[DI] MOV CX,1 MOV AH,09H INT 10H ;Write the character INC SI ;Bump pointers INC SI INC DI INC AL CMP AL,'[' JNZ RTXT2 MOV AL,'A' RTXT2: POP CX LOOP RTXT1 ;Done POP ES POP DS POP DI POP SI POP DX POP CX POP BX POP BP RET _random_text ENDP ;**************************** ; scroll_text * ;**************************** ; Benchmark for text scrolling ; Call with: ; scroll_text(rcaseg,n,vpage) ; Where: ; rcaseg = segment holding array of row/col/attrib coordinates ; n = number of iterations ; vpage = video page ; This benchmark reads the rcseg array 4 elements at a time. ; The first elements holds the row/column coordinates of the ; upper left corner of the rectangle to scroll, while the ; second holds the lower right corner coordinates. ; The third element holds the number of lines to scroll ; The fourth holds attribute bytes used for the background fill ; We assume you've loaded the screen up with stuff before you ; call this routine. PUBLIC _scroll_text SCLTXRCASEG equ [BP+4] SCLTXN equ [BP+6] SCLTXVPAGE equ [BP+8] _scroll_text PROC NEAR PUSH BP MOV BP,SP PUSH BX PUSH CX PUSH DX PUSH SI PUSH DS ;Set up the segment MOV AX,SCLTXRCASEG MOV DS,AX XOR SI,SI ;Get iteration count MOV CX,SCLTXN ;Get video page MOV BX,SCLTXVPAGE ;Do it SCLTX1: PUSH CX ;Scroll up MOV CX,[SI] ;Upper left corner MOV DX,[SI+2] ;Lowr right corner MOV AL,[SI+4] ;# of lines MOV BH,[SI+5] ;Attribute MOV AH,06H INT 10H ;Fill up blank area ;**NOTE: I use [SI+4] in the next line instead of AL, because INT 10H, ;function 6 on the Model 80 munges AL. Go figure. --rg ADD CH,[SI+4] ;Modify ulc XCHG BH,BL MOV AL,'A' CALL FILL_RECT ;Scroll down XCHG BH,BL ADD SI,6 MOV CX,[SI] ;Upper left corner MOV DX,[SI+2] ;Lower right corner MOV AL,[SI+4] ;# of lines MOV BH,[SI+5] ;Attribute MOV AH,07H INT 10H ;Fill up blank area SUB DH,[SI+4] ;MOdify lower right corner XCHG BH,BL MOV AL,'B' CALL FILL_RECT ;See if we're done XCHG BH,BL ADD SI,6 POP CX LOOP SCLTX1 ;Go home POP DS POP SI POP DX POP CX POP BX POP BP RET _scroll_text ENDP ;Fill_rect ; Called by the scroll routine to fill the blank lines created ; when a window is scrolled. ; On entry: ; CH,CL = row/column of ulhc of rectangle ; DH,CL = row/column of lrhc of rectangle ; AL = character to write ; BL = attribute ; BH = video page FILL_RECT PROC NEAR ;Calculate number of columns MOV AH,DL SUB AH,CL INC AH MOV DL,CL FRECT1: CMP DH,CH JA FRECT2 RET FRECT2: PUSH AX ;Set cursor MOV AH,2 INT 10H ;Write characters POP AX PUSH CX MOV CL,AH XOR CH,CH MOV AH,9 INT 10H MOV AH,CL POP CX ;Increment location DEC DH JMP FRECT1 FILL_RECT ENDP ;**************************** ; draw_circle * ;**************************** ; Call with: ; draw_circle (cx,cy,r,color,mode,esseg) ; Where: ; cx,cy are coordinates of center ; r is circle radius in pixels ; color is color ; mode is current graphics mode ; esseg is graphics segment PUBLIC _draw_circle DCX equ [BP+4] DCY equ [BP+6] DCR equ [BP+8] DCCOLOR equ [BP+10] DCMODE equ [BP+12] DCESSEG equ [BP+14] _draw_circle PROC NEAR PUSH BP MOV BP,SP PUSH BX PUSH CX PUSH DX PUSH SI PUSH DI PUSH ES ;Set up graphics segment MOV AX,DCESSEG MOV ES,AX ;Do initial 4 corners MOV AX,DCY ;Initial y coord MOV BX,DCX ;Initial x coord ADD BX,DCR ;add radius MOV CX,DCMODE MOV DX,DCCOLOR CALL SETPIXEL ;One corner MOV BX,DCX SUB BX,DCR CALL SETPIXEL ;another MOV BX,DCX ADD AX,DCR CALL SETPIXEL ;Another MOV AX,DCY SUB AX,DCR CALL SETPIXEL ;And another ;Do arc from 0 to 45 degrees and reflect MOV SI,DCR ;x offset XOR DI,DI ;y offset MOV DX,DI ;rate of change DRC1: ADD DX,DI ;dv=dv+y+y+1 ADD DX,DI INC DX INC DI ;y+=1 CMP DX,SI ;dv>x? JLE DRC2 SUB DX,SI ;dv=dv-x-x+1 SUB DX,SI INC DX DEC SI ;x-=1 ;Now do reflections DRC2: PUSH DX ;Save rate of change MOV DX,DCCOLOR ;Reload color MOV AX,DCY MOV BX,DCX ADD BX,SI ADD AX,DI CALL SETPIXEL SUB AX,DI SUB AX,DI CALL SETPIXEL SUB BX,SI SUB BX,SI CALL SETPIXEL ADD AX,DI ADD AX,DI CALL SETPIXEL ;If x!=y, do other reflections CMP SI,DI JZ DRC3 MOV AX,DCY MOV BX,DCX ADD AX,SI ADD BX,DI CALL SETPIXEL SUB AX,SI SUB AX,SI CALL SETPIXEL SUB BX,DI SUB BX,DI CALL SETPIXEL ADD AX,SI ADD AX,SI CALL SETPIXEL ;See if done DRC3: POP DX ;Restore rate of change CMP DI,SI ;y=x? JB DRC1 ;Go home POP ES POP DI POP SI POP DX POP CX POP BX POP BP RET _draw_circle ENDP ;**************************** ; do_flood * ;**************************** ; Call with: ; do_flood(x,y,color,mode,floodseg,esseg) ; x,y coordinates within bounded region to flood ; color - color to flood with ; mode - graphics mode ; floodseg - use in place of recursive calls; this is ; the pointer to a segment where intermediate ; values will be stored ; esseg - graphics segment ; NOTE: This fellow does NOT check for out-of-screen bounds ; condition. Region MUST be bounded. PUBLIC _do_flood DOFLX equ [BP+4] DOFLY equ [BP+6] DOFLCOLOR equ [BP+8] DOFLMODE equ [BP+10] DOFLSEG equ [BP+12] DOFLESSEG equ [BP+14] _do_flood PROC NEAR PUSH BP MOV BP,SP PUSH BX PUSH CX PUSH DX PUSH SI PUSH DS PUSH ES ;Set segment for temporaries MOV AX,DOFLSEG MOV DS,AX ;Set up graphics segment MOV AX,DOFLESSEG MOV ES,AX XOR SI,SI ;Initialize coordinates and stuff MOV BX,DOFLX MOV AX,DOFLY MOV CX,DOFLMODE ;Set current pixel DOFL1: MOV DX,DOFLCOLOR CALL SETPIXEL ;See if pixel above is filled DEC AX CALL TESTNPUSH ;See if pixel to right is filled INC AX INC BX CALL TESTNPUSH ;See if pixel below is filled INC AX DEC BX CALL TESTNPUSH ;See if pixel to left is filled DEC AX DEC BX CALL TESTNPUSH ;Anything on pixel stack? OR SI,SI JZ DOFL9 ;Something there...fetch and loop SUB SI,4 MOV AX,[SI] MOV BX,[SI+2] JMP DOFL1 ;Go home DOFL9: POP ES POP DS POP SI POP DX POP CX POP BX POP BP RET _do_flood ENDP ; TESTNPUSH ; This routine is used by do_flood to see if a pixel should ; be filled. If the pixel qualified, it is "pushed" onto a ; pixel stack pointed to by DS:SI TESTNPUSH PROC NEAR PUSH SI ;Save CALL GETP ;Get pixel's color POP SI XOR DH,DH ;Clear hi byte CMP DX,DOFLCOLOR ;Match? JZ TNPX ;Already filled if match MOV [SI],AX ;Push y coordinate MOV [SI+2],BX ;Push x coordinate ADD SI,4 ;Increment "stack" pointer TNPX: RET TESTNPUSH ENDP ;************************************** ; DISK BENCHMARKS * ;************************************** ;**************************** ; rand_cyl_seek * ;**************************** ; Random cylinder seek benchmark. ; Call with: ; rand_cyl_seek(arrayseg,size,buffseg,drivenum) ; Where: ; arrayseg = pointer to segment holding array of random ; integers ; size = number of elements in the array ; buffseg = pointer to segment that will be the read buffer ; (In this case, 512 bytes is all you need ) ; drivenum = drive number (0=first fixed disk, 1=second) ; NOTE: Elements in arrayseg must already be in cylinder/sector ; format. PUBLIC _rand_cyl_seek RCYLARRAYSEG equ [BP+4] RCYLARRAYSIZE equ [BP+6] RCYLBUFFSEG equ [BP+8] RCYLDRIVE equ [BP+10] _rand_cyl_seek PROC NEAR PUSH BP MOV BP,SP PUSH BX PUSH CX PUSH DX PUSH SI PUSH ES PUSH DS ;Load count MOV CX,RCYLARRAYSIZE ;Load segment of random numbers and initialize pointer MOV AX,RCYLARRAYSEG MOV DS,AX XOR SI,SI ;Load the buffer segment MOV AX,RCYLBUFFSEG MOV ES,AX XOR BX,BX ;Load drive and head number MOV DX,RCYLDRIVE OR DL,80H XOR DH,DH ;Do it RCYL1: PUSH CX ;Save loop count MOV CX,[SI] ;Get cylinder MOV AH,2 MOV AL,1 ;1 sector INT 13H POP CX JC RCYLE ;Bum out if error INC SI INC SI LOOP RCYL1 XOR AX,AX ;show all ok RCYLX: POP DS POP ES POP SI POP DX POP CX POP BX POP BP RET RCYLE: MOV AL,AH ;Move error to lo byte XOR AH,AH JMP RCYLX ;Return with error _rand_cyl_seek ENDP ;**************************** ; hd_rread * ;**************************** ; Hard disk random read benchmark. ; This test performs a series of seeks to sector 1 head 0 ; for the random cylinder numbers held in arrayseg. ; Call with: ; hd_rread(drive,arrayseg,buffseg,n) ; Where: ; drive = drive number ; arrayseg = segment of array of random cylinder numbers ; nsecseg= number of sectors segment ; buffseg = segment to act as read buffer ; n = number of iterations ; Returns nonzero error code if something happened, else ; returns error. PUBLIC _hd_rread HDDRIVE equ [BP+4] HDARRAYSEG equ [BP+6] HDBUFFSEG equ [BP+8] HDN equ [BP+10] _hd_rread PROC NEAR PUSH BP MOV BP,SP PUSH BX PUSH CX PUSH DX PUSH SI PUSH DS PUSH ES ;Load count MOV CX,HDN ;Load segment of random numbers and initialize pointer MOV AX,HDARRAYSEG MOV DS,AX XOR SI,SI ;Fix buffer pointer MOV AX,HDBUFFSEG MOV ES,AX XOR BX,BX ;Load drive number MOV DX,HDDRIVE XOR DH,DH ;Do it HDRRD1: PUSH CX MOV CX,[SI] MOV AX,[SI+2] MOV AH,2 ;Set code INT 13H ;Call interrupt POP CX ; JC HDRRDERR ;Jump if error ADD SI,4 LOOP HDRRD1 XOR AX,AX ;All ok ;Exit HDRRDX: POP ES POP DS POP SI POP DX POP CX POP BX POP BP RET ; HDRRDERR: MOV AX,CX ; MOV AL,AH ;Error code in AX ; XOR AH,AH ; JMP HDRRDX _hd_rread ENDP ;*************************** ; hd_1seek * ;*************************** ; Call with: ; hd_1seek(drive,cyl,bufseg) ; drive = drive to seek on ; cyl = cylinder to seek to (head 0, sector 1) ; bufseg = seg. of buffer to hold 1 sector ; HD1DRIVE = [BP+4] HD1CYL = [BP+6] HD1SEG = [BP+8] PUBLIC _hd_1seek _hd_1seek PROC NEAR PUSH BP MOV BP,SP PUSH BX PUSH CX PUSH DX PUSH ES ; Set up segments MOV AX,HD1SEG MOV ES,AX ; Zero offset XOR BX,BX ;Set up drive MOV DX,HD1DRIVE XOR DH,DH ;Head 0 MOV CX,HD1CYL ;Cylinder MOV AX,CX SHR AX,1 SHR AX,1 MOV CH,CL ;Adjust MOV CL,AH AND CL,0C0H INC CL MOV AL,1 MOV AH,2 INT 13H JC HD1SERR HD1SEX: POP ES POP DX POP CX POP BX POP BP RET HD1SERR: MOV AL,AH XOR AH,AH JMP HD1SEX _hd_1seek ENDP ;************************************** ; EMS FUNCTIONS FOLLOW * ;************************************** ;**************************** ; do_ems * ;**************************** ; Call with: ; do_ems(pfseg,numpages,memseg,width) ; pfseg is the page frame segment address ; numpages is number of EMS pages to allocate per handle ; memseg is pointer to a 16K segment in conventional memory ; width is transfer width -1=byte, 0=word, 1=doubleword ; This fellow runs the following test ; 1. Create two handles, allocating to each numpages EMS ; pages ; 2. Copy contents of memseg into first handle's EMS memory ; 3. Copy contents of memseg into second handle's EMS memory ; 4. Copy entire contents of second handle's EMS memory back ; into first. ; 5. Deallocate pages ; PUBLIC _do_ems PFSEG equ [BP+4] NUMPAGES equ [BP+6] MEMSEG equ [BP+8] EMSWIDTH equ [BP+10] _do_ems PROC NEAR ;Save registers PUSH BP MOV BP,SP PUSH BX PUSH CX PUSH DX PUSH SI PUSH DI PUSH ES PUSH DS ;Allocate numpages for handle 1 MOV AH,43H MOV BX,NUMPAGES INT 67H OR AH,AH ;Any errors? JZ DOEMS1 MOV AL,1 ;Phase in AL JMP EMSERR DOEMS1: MOV HANDLE1,DX ;Allocate numpages for handle 2 MOV AH,43H MOV BX,NUMPAGES INT 67H OR AH,AH ;All ok? JZ DOEMS2 MOV AL,2 JMP EMSERR DOEMS2: MOV HANDLE2,DX ;Load handle 1 up with information MOV DX,HANDLE1 CALL LOAD_HANDLE OR AX,AX JZ DOEMS3 MOV AL,3 ;Error in phase 3 JMP EMSERR ;Load handle 2 with information DOEMS3: MOV DX,HANDLE2 CALL LOAD_HANDLE OR AX,AX JZ DOEMS4 MOV AL,4 ;Error in phase 4 JMP EMSERR ;Copy handle 2's contents into handle 1 DOEMS4: MOV AX,PFSEG MOV DS,AX ;Set up source ADD AX,1024 ;Destination is 2nd page in frame MOV ES,AX ; XOR BX,BX DOEMS5: PUSH BX ;Save number of pages ;Map handle 2's page in XOR AL,AL ;Physical page 0 MOV AH,44H ;Interrupt INT 67H OR AH,AH ;All ok? JZ DOEMS6 MOV AL,5 ;Error in phase 5 JMP EMSERR ;Map handle 1's page in DOEMS6: MOV AL,1 ;Physical page 1 MOV AH,44H ;Interrupt INT 67H OR AH,AH ;All ok? JZ DOEMS7 MOV AL,6 ;Error in phase 6 JMP EMSERR ;Copy stuff DOEMS7: CALL COPYPAGE ;See if done POP BX INC BX CMP BX,NUMPAGES JL DOEMS5 ;All done with copy - deallocate CALL DEALLOC_PAGES ;Show all ok XOR AX,AX ;Restore registers and exit EMSXIT: POP DS POP ES POP DI POP SI POP DX POP CX POP BX POP BP RET ;Error exit EMSERR: XCHG AH,AL PUSH AX CALL DEALLOC_PAGES JMP EMSXIT _do_ems ENDP ;**************************** ; dealloc_pages * ;**************************** DEALLOC_PAGES PROC NEAR MOV DX,HANDLE1 MOV AH,45H INT 67H MOV DX,HANDLE2 MOV AH,45H INT 67H RET DEALLOC_PAGES ENDP ;**************************** ; load_handle * ;**************************** ; Call with: ; DX = handle number to load ; Returns: ; AX = 0 if ok, else error LOAD_HANDLE PROC NEAR ;Load up segment registers MOV AX,MEMSEG MOV DS,AX ;Memory segment MOV AX,PFSEG MOV ES,AX ;Page frame segment XOR BX,BX ;Start at page 0 LOADHAN1: PUSH BX XOR AL,AL ;Physical page 0 MOV AH,44H ;Interrupt INT 67H OR AH,AH ;All ok? JZ LOADHAN2 POP BX ;Clear stack JMP LOADHANX ;Error exit ;Page now in page frame, copy stuff in LOADHAN2: CALL COPYPAGE ;Move to next frame POP BX INC BX CMP BX,NUMPAGES JL LOADHAN1 XOR AX,AX ;All ok LOADHANX: RET LOAD_HANDLE ENDP ;**************************** ; copypage * ;**************************** ; Copies one page. It is the caller's responsibility to set ; up the segment registers appropriately COPYPAGE PROC NEAR ;Set up common stuff MOV AX,EMSWIDTH ;Copy width? OR AX,AX JS COPYBYTE JZ COPYWORD ;Doubleword copy (386/486 only! ) .386 MOV CX,4096 ;Number of doublewords XOR ESI,ESI XOR EDI,EDI REP MOVSD RET .8086 ;Word-wide copy COPYWORD: MOV CX,8192 XOR SI,SI XOR DI,DI REP MOVSW RET ;Byte-wide copy COPYBYTE: MOV CX,16384 XOR SI,SI XOR DI,DI REP MOVSB RET COPYPAGE ENDP ; ; void start_timer(void) ; call as: ; start_timer() public _start_timer _start_timer proc near push ax push dx push ds ;clear the accumulators mov timer_micro,0 mov timer_milli,0 mov timer_sec,0 ;initialize counter 0 of 8253 timer mov al,00110100b ;ctr 0, lsb then msb, ;...mode 2, binary out TIMER_MODE,al ;mode register for 8253 sub ax,ax ;0 results in max count out TIMER0,al ; lsb out TIMER0,al ; msb ;read current bios time-of-day mov dx,BIOS_DATASEG mov ds,dx mov ax, ds:[BIOS_TIME_LO] pop ds ;restore my ds mov count_low,ax pop dx pop ax ret _start_timer endp ; ; void stop_timer (unsigned int *) ; call: ; stop_timer(tarray) ; where: ; tarray is defined as unsigned int tarray[3] ; tarray[0]=elapsed time, microseconds ; tarray[1]=elapsed time, milliseconds ; tarray[2]=elapsed time, seconds ; public _stop_timer _stop_timer proc near push bp mov bp,sp push ax push bx push cx push dx push di push si ;read counter 0 of 8253 timer xor al,al ;latch counter for read cli ;interrupts off out TIMER_MODE,al in al,TIMER0 mov dl,al in al,TIMER0 mov dh,al ;dx has 16-bit timer count ; we'll defer calculations till after sti mov svd_8253_count, dx ;get bios time push ds ;save my data seg mov dx,BIOS_DATASEG mov ds,dx mov ax,ds:[BIOS_TIME_LO] pop ds sti ;ints ok now sub ax,count_low mul count_convert cmp dx, 1000 jb no_overflow ; dx is too large, need to pre-divide by 1000 push cx ; use cx as swapping reg push ax ; save current low word microsecs mov ax, dx ; move hi word microsecs to dividend xor dx, dx div thousand ; now ax = hi word millis, dx = hi w micros mov cx, ax ; save hi word millis pop ax ; pop low word microsecs to dividend lo div thousand mov count_micro, dx ; save microseconds mov dx, cx ; now dx=count_milli_hi, ax=count_milli_lo div thousand ; now ax=count secs, dx=count_milli mov count_milli, dx mov timer_sec, ax pop cx jmp short gotcount no_overflow: div thousand mov count_milli,ax ;save milliseconds mov count_micro,dx ;save microseconds gotcount: ;calc time from 8253 mov dx, svd_8253_count or ax, MAX_COUNT sub ax,dx ;timer count value mul timer_convert ;<10000, so overflow not possible div ten_thousand ;give time in usec mov timer_micro,ax ;save usec, round nsec cmp dx,five_thousand jb cont inc timer_micro ;round up cont: ;restore bios numbers mov ax, count_milli mov dx, count_micro ;check for jitter cmp timer_sec, 0 jne jitter_ok cmp ax,0 jne jitter_ok mov ax,_timeradjust cmp timer_micro,ax jae jitter_ok mov timer_micro,ax ;put results in timer variables jitter_ok: mov ax,dx ;get count_micro add ax,timer_micro ;sum micro fields cmp ax,_timeradjust ;check for underflow jae compensate dec count_milli ;borrow add ax,1000 compensate: sub ax,_timeradjust ;compensate for timer delays mov timer_micro,ax cmp ax,1000 ;check field overflow jb fld_ok ;timer micro field ok sub dx,dx ;too large div thousand ;so carry out into timer_milli mov timer_milli,ax mov timer_micro,dx fld_ok: mov ax,count_milli ;sum milli field add timer_milli,ax cmp timer_milli,1000 ;check as above jb goback sub dx,dx mov ax,timer_milli div thousand add timer_sec,ax mov timer_milli,dx ;send it all back goback: push ds pop es mov di, [bp+4] ;pointer to array mov si, offset timer_micro movsw movsw movsw pop si pop di pop dx pop cx pop bx pop ax pop bp ret _stop_timer endp ;**************************** ; setp * ;**************************** ; Set pixel at x,y to color. Mode is mode #. ; Call with: ; AX = y coordinate of pixel to set ; BX = x coordinate of pixel to set ; CX = mode ; DX = color ; NOTE: ; This routine assumes that ES points to the current video ; page. It is the caller's job to do this. SETPIXEL PROC NEAR PUSH AX PUSH BX PUSH CX PUSH DX ;Determine which routine to execute using mode ;First check for Hercules CMP CL,255 JNE SETPIXEL10 ; ; Hercules mode CALL CALCPH SETPIXEL01: SHL DX,CL ;Shift color NOT DH AND ES:[BX],DH ;Zero the pixel OR ES:[BX],DL ;Set it SETPIXEXIT: POP DX POP CX POP BX POP AX RET ; SETPIXEL10: CMP CL,6 JGE SETPIXEL20 ; ;Modes 4 and 5 ; CALL CALCP4 JMP SHORT SETPIXEL01 ;Borrow code ; SETPIXEL20: CMP CL,13 JGE SETPIXEL30 ; ;Mode 6 ; CALL CALCP6 JMP SHORT SETPIXEL01 ;Borrow code ; SETPIXEL30: CMP CL,14 JGE SETPIXEL40 ; ;Mode 13 ; CALL CALCP13 SETPIXEL31: SHL DH,CL ;Position mask MOV CX,DX ;Move mask/color to safety MOV AH,DH MOV DX,3CEH ;Address register port MOV AL,8 ;Mask register number OUT DX,AX MOV AX,205H ;Mode register number 2, write mode 2 OUT DX,AX MOV AH,0 ;Replace mode MOV AL,3 ;Data rotate/function select register OUT DX,AX MOV AL,ES:[BX] ;Load the latches MOV ES:[BX],CL ;Store it MOV AX,0FF08H ;Restore defaults OUT DX,AX MOV AX,5 OUT DX,AX MOV AX,3 OUT DX,AX JMP SETPIXEXIT ; SETPIXEL40: CMP CL,17 JGE SETPIXEL50 ; ; Modes 14,15,16 ; SETPIXEL41: CALL CALCP14 JMP SHORT SETPIXEL31 ;Borrow code ; SETPIXEL50: CMP CL,18 JGE SETPIXEL60 ; ; Mode 17 ; CALL CALCP14 JMP SHORT SETPIXEL01 ;Borrow code ; SETPIXEL60: CMP CL,18 JZ SETPIXEL41 ;18 same as EGA ; ; Mode 19 ; CALL CALCP19 MOV ES:[BX],DL ;set it JMP SETPIXEXIT SETPIXEL ENDP ;**************************** ; getp * ;**************************** ; Get a pixel's contents. ; Call with: ; AX = y coordinate ; BX = x coordinate ; CX = mode ; Returns: ; DL = color ; GETP PROC NEAR PUSH AX PUSH BX PUSH CX CMP CL,255 ;Hercules mode selected by 255 JNE GETP10 ; ; Hercules monochrome mode ; CALL CALCPH GETP01: MOV DL,ES:[BX] SHR DL,CL AND DL,DH GETPEXIT: POP CX POP BX POP AX RET ; GETP10: CMP CL,6 JGE GETP20 ; ; Modes 4 and 5 ; CALL CALCP4 JMP SHORT GETP01 ;Borrow code ; GETP20: CMP CL,7 JGE GETP30 ; ; Mode 6 ; CALL CALCP6 JMP SHORT GETP01 ;Borrow code ; GETP30: CMP CL,14 JGE GETP40 ; ; Mode 13 ; CALL CALCP13 GETP31: MOV CH,DH SHL CH,CL MOV SI,BX MOV DX,3CEH MOV AX,304H XOR BL,BL GETP32: OUT DX,AX MOV BH,ES:[SI] AND BH,CH NEG BH ROL BX,1 DEC AH JGE GETP32 MOV DL,BL JMP GETPEXIT ; GETP40: CMP CL,15 JL GETP51 JNE GETP50 ; ; Special for mode 15 ; CALL CALCP14 MOV CH,DH SHL CH,CL MOV SI,BX MOV DX,3CEH MOV AX,204H XOR BL,BL GETP41: OUT DX,AX MOV BH,ES:[SI] AND BH,CH NEG BH ROL BX,1 SUB AH,2 JGE GETP41 MOV DL,BL JMP GETPEXIT ; Mode 17 GETP50: CMP CL,17 JNZ GETP60 CALL CALCP14 MOV DL,ES:[BX] SHR DL,CL AND DL,DH JMP GETPEXIT ; ; Modes 14 and 16 ; GETP51: CALL CALCP14 JMP GETP31 ;Borrow code ; GETP60: CMP CL,18 JLE GETP51 ;Mode 18 same as EGA 14 and 16 ; ; Mode 19 ; CALL CALCP19 MOV DL,ES:[BX] JMP GETPEXIT GETP ENDP ;**************************** ; ROUTINES FOR CALCULATING A ; PIXEL'S ADDRESS FOLLOW. ; ; Calculate pixel address for modes 4 and 5 ; Entry: AX = y coord ; BX = x coord ; Exit: DH = bit mask ; BX = byte offset ; CL = number of bits to shift CALCP4 PROC NEAR MOV CL,BL XCHG AH,AL SHR AX,1 ADD BH,AL XOR AL,AL ADD BX,AX SHR AX,1 SHR AX,1 ADD BX,AX SHR BX,1 SHR BX,1 MOV DH,3 AND CL,DH XOR CL,DH SHL CL,1 RET CALCP4 ENDP ; ; Calculate address of pixel for mode 6 ; Entry: See abov ; Exit: See above ; CALCP6 PROC NEAR MOV CL,BL XCHG AH,AL SHR BX,1 SHR AX,1 ADD BH,AL XOR AL,AL ADD BX,AX SHR AX,1 SHR AX,1 ADD BX,AX SHR BX,1 SHR BX,1 AND CL,7 XOR CL,7 MOV DH,1 RET CALCP6 ENDP ; ; Calculate pixel address for mode 13 ; Entry: See above ; Exit: See above ; CALCP13: MOV CL,BL MOV CH,DL ;Save color and borrow... MOV DX,40 ;...DX CP13COM: MUL DX SHR BX,1 SHR BX,1 SHR BX,1 ADD BX,AX AND CL,7 XOR CL,7 MOV DL,CH ;Restore color MOV DH,1 RET ; ; Calculate pixel address for modes 14,15,16,17,18 ; Entry: See above ; Exit: See above ; CALCP14: MOV CL,BL MOV CH,DL ;Save color MOV DX,80 JMP SHORT CP13COM ; ; Calculate pixel address for mode 19 ; Entry: See above ; Exit: See above ; Note: we don't need a bit mask in AH or a shift count in CL ; for this mode. ; CALCP19 PROC NEAR XCHG AH,AL ADD BX,AX SHR AX,1 SHR AX,1 ADD BX,AX RET CALCP19 ENDP ; ; Calculate pixel address for Hercules graphics mode ; CALCPH PROC NEAR MOV CL,BL SHR AX,1 RCR BX,1 SHR AX,1 RCR BX,1 SHR BX,1 MOV AH,90 MUL AH ADD BX,AX AND CL,7 XOR CL,7 MOV DH,1 RET CALCPH ENDP ;**************************** ; svmode * ;**************************** ; Set video mode. Call with: ;* svmode(mode) int mode; ; Set video mode. ; Mode is: ; 0 - 40 x 25 chars b&w (cga,ega,mcga,vga) ; 1 - 40 x 25 chars color (cga,ega,mcga,vga) ; 2 - 80 x 25 chars b&w (cga,ega,mcga,vga) ; 3 - 80 x 25 chars color (cga,ega,mcga,vga) ; 4 - 320 x 200 4-color graph (cga,ega,mcga,vga) ; 5 - 320 x 200 b&w graph (cga,ega,mcga,vga) ; 6 - 640 x 200 b&w graph (cga,ega,mcga,vga) ; 7 - 80 x 25 chars b&w (mda,ega,vga) ; 8 - 160 x 200 16-color graph (jr) ; 9 - 320 x 200 16-color graph (jr) ; 10 - 640 x 200 4-color graph (jr) ; 11 - reserved by EGA video BIOS ; 12 - reserved by EGA video BIOS ; 13 - 320 x 200 16-color graph (ega,vga) ; 14 - 640 x 200 16-color graph (ega,vga) ; 15 - 640 x 350 2-color graph (ega,vga) ; 16 - 640 x 350 4- or 16-color (ega,vga) ; 17 - 640 x 480 2-color (mcga,vga) ; 18 - 640 x 480 16-color (vga) ; 19 - 320 x 200 256-color (mcga,vga) ; 255 - Heculese 720x348 monochrome graphics PUBLIC _svmode _svmode PROC NEAR PUSH BP MOV BP,SP PUSH SI PUSH DI MOV AX,4[BP] CMP AX,255 ;Hercules? JZ HERC PUSH DS MOV BX,40H ;Video display data area MOV DS,BX MOV BL,32 ;Presence of CGA MOV AX,4[BP] MOV DL,AL AND DL,7 CMP DL,7 JNE SVM1 MOV BL,48 ;Presence of MDA SVM1: AND BYTE PTR DS:[10H],11001111B OR BYTE PTR DS:[10H],BL INT 10H ;Set the mode POP DS ;Restore DS POP DI POP SI POP BP RET HERC: ;Update video bios data area PUSH ES MOV AX,40H MOV ES,AX MOV DI,49H ;ES:DI is video bios data area MOV SI,OFFSET BDATA MOV CX,BDLEN REP MOVSB ;Update video bios data ;Set config. switch MOV DX,3BFH ;Config switch port MOV AL,1 ;Exclude second 32K of video buffer OUT DX,AL ;Blank the screen MOV DX,3B8H XOR AL,AL OUT DX,AL ;Program the CRTC SUB DL,4 ;3b4H is addres reg port of CRTC MOV SI,OFFSET CRTCP MOV CX,9 ;9 parameters to load HERC1: LODSW ;Al=crtc register number/AH=VALUE OUT DX,AX LOOP HERC1 ;Set graphics mode ADD DL,4 MOV AL,CRTMD OUT DX,AL ;Clear the video buffer MOV AX,0B000H MOV ES,AX XOR AX,AX ;Clear to zero XOR DI,DI MOV CX,4000H REP STOSW POP ES POP DI POP SI POP BP RET ;Go home _svmode ENDP ;**************************** ; gvmode * ;**************************** ; Get video mode. Returns current video mode number. PUBLIC _gvmode _gvmode PROC NEAR MOV AH,0FH INT 10H XOR AH,AH ;Clear hi part of mode number RET _gvmode ENDP ;***************************** ; FILE IO ROUTINES * ;***************************** ; ;***************************** ; ll_open * ;***************************** ; Open a file with read/write access. ; Call with: ; hand=ll_open(nameptr) ; Where: ; nameptr = pointer to file's name (null-terminated) ; Returns handle. If handle<0, indicates error. PUBLIC _ll_open OPENNAMEPTR equ [BP+4] _ll_open PROC NEAR PUSH BP MOV BP,SP PUSH DX ;Issue the call MOV DX,OPENNAMEPTR MOV AH,3DH MOV AL,2 ;Read/write INT 21H JC LLOPZ ;Return handle LLOPX: POP DX POP BP RET LLOPZ: NEG AX JMP LLOPX _ll_open ENDP ;***************************** ; ll_close * ;***************************** ; Close a file. ; Call with: ; ll_close(handle) ; Where: ; handle = file's handle. PUBLIC _ll_close CLOSEHAND equ [BP+4] _ll_close PROC NEAR PUSH BP MOV BP,SP ;Get the handle MOV BX,CLOSEHAND MOV AH,3EH INT 21H POP BP RET _ll_close ENDP ;***************************** ; ll_create * ;***************************** ; Create a file with read/write access. ; Call with: ; hand=ll_create(nameptr) ; Where: ; nameptr = pointer to file's name (null-terminated) ; Returns handle. If handle<0, indicates error. PUBLIC _ll_create CREATNAMEPTR equ [BP+4] _ll_create PROC NEAR PUSH BP MOV BP,SP ;Get the file name and create it. MOV DX,CREATNAMEPTR MOV AH,3CH XOR CX,CX INT 21H JC LLCRZ ;Return handle LLCRX: POP BP RET ;Return error LLCRZ: NEG AX JMP LLCRX _ll_create ENDP ;***************************** ; ll_seekread * ;***************************** ; Seek-and-read an open file. ; Call with: ; result=ll_seekread(handle,offset,mode,buffer,nbytes) ; Where: ; handle = handle of file to read ; offset = byte offset ; mode = offset mode ; buffer = segment of buffer to read into ; nbytes = number of bytes to read ; Returns: ; Number of bytes actually read. If error, result is negative ; and contains error code. ; Note: The data is read into the segment starting at offset 0. PUBLIC _ll_seekread SRHANDLE equ [BP+4] SROFFSETL equ [BP+6] SROFFSETH equ [BP+8] SRMODE equ [BP+10] SRBUFFSEG equ [BP+12] SRNBYTES equ [BP+14] _ll_seekread PROC NEAR PUSH BP MOV BP,SP PUSH BX PUSH CX PUSH DX PUSH DS ;Do the seek first MOV BX,SRHANDLE ;Get handle MOV DX,SROFFSETL ;Get byte offset MOV CX,SROFFSETH MOV AX,SRMODE MOV AH,42H INT 21H ;Do the seek JC SRERR ;Error if carry set ;Now do the read MOV AX,SRBUFFSEG MOV DS,AX XOR DX,DX ;Set address MOV CX,SRNBYTES ;Number of bytes MOV AH,3FH INT 21H ;Do the read JC SRERR ;Return bytes actually read SRX: POP DS POP DX POP CX POP BX POP BP RET ;Return error code SRERR: NEG AX JMP SRX _ll_seekread ENDP ;***************************** ; ll_seekwrite * ;***************************** ; Seek-and-write an open file. ; Call with: ; result=ll_seekwrite(handle,offset,mode,buffer,nbytes) ; Where: ; handle = handle of file to write ; offset = byte offset ; mode = seek mode ; buffer = segment of buffer to write from ; nbytes = number of bytes to write ; Returns: ; Number of bytes actually written. If error, result is negative ; and contains error code. ; Note: The data is written from the segment starting at offset 0. PUBLIC _ll_seekwrite SWHANDLE equ [BP+4] SWOFFSETL equ [BP+6] SWOFFSETH equ [BP+8] SWMODE equ [BP+10] SWBUFFSEG equ [BP+12] SWNBYTES equ [BP+14] _ll_seekwrite PROC NEAR PUSH BP MOV BP,SP PUSH BX PUSH CX PUSH DX PUSH DS ;Do the seek first MOV BX,SWHANDLE ;Get handle MOV DX,SWOFFSETL ;Get byte offset MOV CX,SWOFFSETH MOV AX,SWMODE ;Seek mode MOV AH,42H INT 21H ;Do the seek JC SWERR ;Error if carry set ;Now do the write MOV AX,SWBUFFSEG MOV DS,AX XOR DX,DX ;Set address MOV CX,SWNBYTES ;Number of bytes MOV AH,40H INT 21H ;Do the write JC SWERR ;Return bytes actually write SWX: POP DS POP DX POP CX POP BX POP BP RET ;Return error code SWERR: NEG AX JMP SWX _ll_seekwrite ENDP ;**************************** ; ll_filelen * ;**************************** ; Return a file's length. ; ulong = ll_filelen(fh) PUBLIC _ll_filelen FLENFH equ [BP+4] ;File handle _ll_filelen PROC NEAR PUSH BP MOV BP,SP PUSH BX PUSH CX PUSH DX ;First do a seek on the file MOV BX,FLENFH ;Get handle XOR CX,CX XOR DX,DX ;Offset 0 MOV AL,2 ;End of file MOV AH,42H INT 21H ;Return the offset POP DX POP CX POP BX POP BP RET _ll_filelen ENDP END