CI>   How do you write to a specific byte in memory in Dos??
 CI>   How do you write to a specific byte in memory in
 CI> Windows(95) ??
I don't understand the question. Sorry.
 CI>   Does the video memory start at $A000 on all gfx. cards??
$A000:0000 or (flat) $000A0000, yes.
 CI>   What is the fastest way (if there are any diffence) to
 CI> compary a register with the value zero.
well, there's OR AL,AL (followed by JZ or JNZ) and JCXZ.
JCXZ is only one instruction, i.e the fastest, but there's
no JCXNZ instruction unfortunatly.
So OR reg,reg is the shortest way with NZ option.
Otherwise, JCXZ is the fastest, OR and CMP equal speed.
I think.
 CI>   Are anybody here an expirienced windows-programmer??
Isn't there some sort of windows echo? Think so...
[peter]
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