Help!!! How to write binary to the screen?

[siutat]

I am a beginner in Assembly and just receievd an assignment on this area with one procedure look like this, could someone be able to tell me how to implement it? I have absloutly no idea. Thank you!

AppendBinary PROC
; append the binary representation of the accumulator contents to a string
; with the write starting at address DS:SI
; pre: BX specifies whether AL or AX is to be output (if BX=0 output AL otherwise AX)
; post: the binary representation of the value in the specified accumulator
; has been appended (with MSB leftmost) starting at the address DS:SI
; AND DS:SI points to the char immediately following the appended chars
; AND all registers (excluding SI) are preserved

; ========================================================================
; About 20 instructions in this procedure
; ========================================================================

ret
AppendBinary ENDP

 

[sarnath]

Algo:

PUSHALL except SI
x=1; // let "x" be a character

loop:

temp = input;
and (input) , x
if zero flag set,
move ds:[si], 30h // Ascii for "0"
else
move ds:[si],31h // Ascii for "1"
inc si
x = x << 1;
input = temp;
if (x != 0)
Jump to loop

POPall except SI
return; Thatz it
Do not rejoice that ur code works.
it might be a special case of an error :-(