.asm, ASM, MASM, NASM, Assembly Language, To Display Floppy,MAth,Game-IO,DMA information when caps lock is on ; Else : Display Video Mode and No.of Drives installed.

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;Programmed by Saqib khan ;Purpose: To Display Floppy,MAth,Game-IO,DMA information when caps lock is on ; Else : Display Video Mode and No.of Drives installed. ;Dated: 22nd/May/2012 .model small .stack 100h .data str_floppy_n db 10,"Floppy disk drive not installed.$" str_floppy_y db 10,"Floppy disk drive installed. $" str_math_n db 10,"Math coprocessor not installed. $" str_math_y db 10,"Math coprocessor installed.$" str_game_y db 10,"Game IO is installed:$" str_game_n db 10,"Game IO is not installed:$" str_vid0 db 10,"Video Mode None $" str_vid1 db 10,"Video Mode:40*25 color $" str_vid2 db 10,"Video Mode:80*25 color $" str_vid3 db 10,"Video Mode:80*25 Monochrome $" str_dma_ok db 10,"DMA is Present $" str_dma_not db 10,"DMA is not Present $" str_drives db 10,"No.of drives are: $" .code main: mov ax,@data mov ds,ax int 11h ;Interrupt for Equipment installed mov bx,ax ;Store original Copy mov ah,2 ;Interrup for Keyboard Special Keys int 16h ;Call OS to do the job mov cl,2 ;Offset value for shifting shl al,cl ;Shift Left al by the value of cl jc video_mode ;Jump if carry flag is on floppy_y: mov ax,bx and ax, 1 ;Masking value for Floppy disk drive jz floppy_n ;Jump if zero flag lea dx,str_floppy_y ;Load address of string mov ah,9h ;Service # to display string int 21h ;Call OS to do the job jmp math_ok ;jmp next block floppy_n: lea dx,str_floppy_n ;Load address of string mov ah,9h ;Service # to display string int 21h ;Call OS to do the job math_ok: mov ax,bx ;Restore the original value and ax,2 ;Masking value for jz math_no lea dx,str_math_y mov ah,9h int 21h jmp dma_ok math_no: lea dx,str_math_n mov ah,9h int 21h dma_ok: mov ax,bx and ax,256 jz no_dma lea dx,str_dma_ok mov ah,9h int 21h jmp Game_IO no_dma: lea dx,str_dma_not mov ah,9h int 21h Game_IO: mov ax,bx and ax,4096 jz no_game_io lea dx,str_game_y mov ah,9h int 21h no_game_io: lea dx,str_game_n mov ah,9h int 21h jmp end_lbl video_mode: mov ax,bx mov cl,4 and ax,48 shr al,cl add al,30h cmp al,30h je str0_disp cmp al,31h je str1_disp cmp al,32h je str2_disp lea dx,str_vid3 mov ah,9h int 21h jmp chk_drives str0_disp: lea dx,str_vid0 mov ah,9h int 21h jmp chk_drives str1_disp: lea dx,str_vid1 mov ah,9h int 21h jmp chk_drives str2_disp: lea dx,str_vid2 mov ah,9h int 21h chk_drives: lea dx,str_drives mov ah,9h int 21h mov cl,6 mov ax,bx and ax,192 shr al,cl inc al mov dl,al add dl,30h mov ah,2h int 21h end_lbl: mov ah,4ch int 21h end main