flat assembler
Message board for the users of flat assembler.
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MegaCoder 10 Mar 2011, 17:21
hello ... How do I display the time through hello ... How do I display the time through INT 1aH? the code please.
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roboman 11 Mar 2011, 05:02
I'm guessing your home work wants you to use a function of INT 1aH to get the time. That would likely be function 02H that you are looking for. You load 02H into register AH then call INT 1aH. That will load the time
into register CX and the seconds into DH as well as setting a flag in DL if it's daylight savings time. That leaves you with figuring out how to print something on the screen and that depends a great deal on what os you are using and what kind of support it offers in printing numbers and text. Also depends on what graphics / text mode you are in.... Here's the source for a clock program I did for DexOS http://home.comcast.net/~dexos/time.zip clock: push eax ; don't want to trash a & b several times a sec push bx call [GetTime] ; ask the computer what time it is shr eax,8 ; Blow off seconds cmp ax,word[old_time] ; has the time changed je done ; no need to reprint the same time mov word[old_time],ax ; make a bew old time mov bx,ax ; store the time in ebx shr al,4 ; blow off the low digit of the min add al,48 ; change it to ascii mov [0xb7b08],al ; write to screen mov al,00001111b ; mask to dump other part of min and al,bl ; put other digit of min in al add al,48 ; change to ascii mov [0xb7b0a],al ; write to screen mov al,bh ; get the hour from bx shr al,4 ; blow off low digit add al,48 ; change to acii mov [0xb7b02],al ; put high digit of hour on screen mov al,00001111b ; mask to dump high didit of hour and al,bh ; put low didit of hour in al add al,48 ; make ascii mov [0xb7b04],al ; put it on screen mov al,':' ; gotta have a colen mov [0xb7b06],al ; on the screen done: pop bx pop eax The DexOS function GetTime loads the time into register eax |
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MegaCoder 12 Mar 2011, 15:54
Thanks ...
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