Category : Assembly Language Source Code
Archive   : ZENASM.ZIP
Filename : LST9-8.ASM
; *** Listing 9-8 ***
;
; Times the performance of a 16-bit subtraction
; of an immediate value of 1.
;
mov dx,1000
call ZTimerOn
TestLoop:
sub dx,1 ;decrement DX by subtracting 1 from
; it (3 bytes long, uses sign-
; extended mod-reg-rm form of SUB)
jnz TestLoop
call ZTimerOff
Very nice! Thank you for this wonderful archive. I wonder why I found it only now. Long live the BBS file archives!
This is so awesome! 😀 I’d be cool if you could download an entire archive of this at once, though.
But one thing that puzzles me is the “mtswslnkmcjklsdlsbdmMICROSOFT” string. There is an article about it here. It is definitely worth a read: http://www.os2museum.com/wp/mtswslnk/