main proc near jmp buff buffer: db 10h dup (0) buff: call init call creat call pswd call getpath call adddisp call close init proc near mov ah, 30h ;what dos are we under? int 21H cmp al,2 ;dos 2.0 or over? jae a1 ;yes, skip mov ah, 09h ;no, bitch mov dx, offset baddos int 21H int 20h ;and exit a1: mov ah,09h ;print claims mov dx,msg001 int 21h ret msg001: db 'This Program is copyrighted 1992. Ver. 2.00',0Dh,0Ah db 'by ROBERT WALLINGFORD, P.E., 2338 N. McVicker Ave., Chicago, IL 60639-2216.',0Dh,0Ah db 'Distributed as a part of the Shareware BOOK collection of programs.',0Dh,0Ah,0Dh,0Ah db 'This Program assembles a set of sequentially numbered, DISP.Nxx files',0Dh,0Ah db 'and assign the timing and attribute bytes.',0Dh,0Ah,'$' baddos: db 'This program requires DOS 2.0!$' endp creat proc near mov ah,5bh ;create file mov cx,0h mov dx,offset bigd ;name of file int 21h jc error1 mov w[0104h],ax ;store handle mov ah,09h ;print msg mov dx,msg4 int 21h jmp end1 error1: mov ah,09h ;print msg mov dx,msg1 int 21h int 20h end1: ret endp msg1: db 'File already exists.',0Dh,0Ah db 'To remake DISPLAY.FIL, you must either delete or rename the old file,',0Dh,0Ah db 'or move it to another directory or subdirectory, then delete this copy.',0Dh,0Ah,'$' msg4: db 'DISPLAY.FIL has been created. ',0Dh,0Ah,'$' bigd: db 'DISPLAY.FIL$' pswd proc near ;add password mov ah,40h ;write file mov bx,w[0104h] ;get handle mov cx,0005h ;number of bytes to write mov dx,offset mp1 int 21h mov ah,00h mov b[010fh],ah mov ah,09h ;print msg mov dx,msg8 int 21h ret endp mp1: db 01h,44h,49h,53h,50h msg8: db 'Password has been added. ',0Dh,0Ah,'$' getpath proc near mov ax,offset pth mov w[0108h],ax mov si,ax mov ax,1900h ;get DOS drive no. int 21h add al,41h ;make it a letter mov b[si],al ;store it inc si mov b[si],3ah ;add a ":" inc si mov b[si],5ch ;add a "\" inc si ;location for path mov dl,00h mov ah,47h ;get full path int 21h jc errgp1 cmp b[si],00h je ls2 ;jump if root directory ls1: inc si cmp b[si],00h jne ls1 ;loop till end of path mov b[si],5ch ;add a "\" inc si ls2: mov w[0106h],si ;store end of path address ret errgp1: int 20h pth: db 50h dup (?) endp addit proc near mov ax,3da0h ;open file to read mov dx,w[0108h] ;path and filename int 21h jc errad1 ;file missing inc b[010fh] push ax call sect mov ax,4000h mov bx,w[0104h] mov cx,0001h mov dx,010ch int 21h call attb mov ax,4000h mov bx,w[0104h] mov cx,0001h mov dx,0110h int 21h mov ax,3f00h ;read file to buffer pop bx mov cx,7dh ;how many to read mov dx,3000 ;buffer int 21h mov ax,3e00h ;close file int 21h mov ax,4000h ;write file from buffer mov bx,w[0104h] ;get handle mov cx,7dh ;how mamy to write mov dx,3000 ;buffer int 21h ret errad1: call close ret endp adddisp proc near mov si,w[0106h] mov b[si],44h ;add DISP.N-- inc si mov b[si],49h inc si mov b[si],53h inc si mov b[si],50h mov w[0106h],si ;store address mov b[si + 05h],00h mov b[si + 01h],2eh mov b[si + 02h],4eh mov b[010eh],00h ;initialize page mov b[010dh],00h ploop: inc b[010eh] ;new page mov al,b[010eh] initlp: mov bl,b[010dh] mov al,b[010eh] pnumb: cmp al,0ah jb pnumb1 inc bl sub al,0ah mov b[010eh],al mov b[010dh],bl jmp pnumb pnumb1: add al,30h add bl,30h mov b[si + 03h],bl mov b[si + 04h],al call addit mov ah,09h mov dx,msgch2 int 21h mov ah,02h mov dl,b[si + 03h] int 21h mov ah,02h mov dl,b[si + 04h] int 21h mov ah,09h mov dx,msgch3 int 21h jmp ploop ret endp msgch2: db 'DISP.N$' msgch3: db ' has been added to DISPLAY.FIL with its timing byte. ',0Dh,0Ah,'$' sect proc near mov ah,09h mov dx,msgch0 int 21h mov ah,02h mov dl,b[si + 03h] int 21h mov ah,02h mov dl,b[si + 04h] int 21h mov ah,09h mov dx,msgch1 int 21h mov cl,00h ;initialize mov b[010ah],cl ;initialize mov b[010bh],cl ;initialize mov cx,0002h ;initialize mov bp,010ah ;initialize mor: mov ah,00h ;wait for a character int 16h cmp ah,00h ;is it special? jz mor cmp ax,1c0dh ;is it ENTER? je stopp cmp al,39h ;bigger than 9? ja mor cmp al,30h ;smaller than 0? jb mor push cx push ax mov ah,09h mov bh,00h mov bl,0fh mov cx,01h int 10h mov ah,03h int 10h add dl,01h mov ah,02h int 10h pop ax pop cx sub al,30h mov b[bp],al inc bp dec cx cmp cx,0000h jne mor jmp stop2 stopp: cmp cx,0002h jne stop1 mov ah,09h mov dx,stmsg1 int 21h jmp mor stmsg1: db 0dh,0ah,'NO NUMBER, try again.',0dh,0ah,'$' stmsg2: db 0dh,0ah,'$' stop1: cmp cx,0001h jne stop2 mov ah,b[010ah] mov b[010bh],ah mov ah,00h mov b[010ah],ah stop2: mov ah,00h mov al,b[010ah] mov dh,0ah mul dh mov dh,00h mov dl,b[010bh] add ax,dx mov b[010ch],al mov ah,09h mov dx,stmsg2 int 21h ret msgch0: db 'How many seconds do you want DISP.N$' msgch1: db ' to be displayed?',0Dh,0Ah db '(Type a number from 1 to 99, then press ENTER.)',0Dh,0Ah,'$' endp attb proc near mov ah,09h mov dx,msgat0 int 21h mov ah,02h mov dl,b[si + 03h] int 21h mov ah,02h mov dl,b[si + 04h] int 21h mov ah,09h mov dx,msgat1 int 21h mor0: mov ah,00h ;wait for a character int 16h cmp ah,00h ;is it special? jz mor0 cmp ax,1c0dh ;is it ENTER? jz at0 cmp al,31h ;is it 1 ? jz at1 cmp al,32h ;is it 2 ? jz at2 cmp al,33h ;is it 3 ? jz at3 cmp al,34h ;is it 4 ? jz at4 jmp mor0 at0: nop at1: mov al,07h ;white on black jmp att at2: mov al,70h ;black on white jmp att at3: mov al,0fh ;high white on black jmp att at4: mov al,78h ;black on high white att: push ax mov ah,09h mov dx,msgat2 int 21h mor1: mov ah,00h ;wait for a character int 16h cmp ah,00h ;is it special? jz mor1 cmp ax,1c0dh ;is it ENTER? jz att0 cmp al,4eh ;is it N ? jz att1 cmp al,6eh ;is it n ? jz att1 cmp al,59h ;is it Y ? jz att2 cmp al,79h ;is it y ? jz att2 jmp mor1 att0: nop att1: mov bl,00h jmp attt att2: mov bl,80h attt: pop ax add al,bl mov b[0110h],al ret msgat0: db 'What attribute do you want DISP.N$' msgat1: db ' to have in the display?',0Dh,0Ah db 'Press 1 for normal white on black.',0dh,0ah db 'Press 2 for black on normal white.',0dh,0ah db 'Press 3 for bright white on black.',0dh,0ah db 'Press 4 for black on bright white.',0dh,0ah,'$' msgat2: db 0dh,0ah,'Do you want it to blink ?',0dh,0ah db '(Press Y or N )',0dh,0ah,'$' endp close proc near mov ax,4200h mov bx,w[0104h] mov cx,0000h mov dx,0000h int 21h mov ah,40h mov bx,w[0104h] mov cx,0001h mov dx,010fh int 21h mov ah,3eh ;close file mov bx,word ptr [0104h] ;get handle int 21h jc errc mov ah,09h ;print msg mov dx,msgc int 21h errc: int 20h ;end program anyway ret msgc: db 'DISPLAY.FIL has been successfully closed. Thank You. $' endp end