Re: help sought, possible asm/cpu/other problem???

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#234

From: Dennis Cote
Date: Wed, 16 Jul 2008 23:19

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dhoke wrote:
> 
> 1)Please report if you spot an error in the BytesOK() routine.  

> 5)The CPU disassembly pane does seem to correctly reflect the source written 
> (if(_eax &0x4000) optimized to test ah, $40.)
> 
>          lahf
>          //now, which bit is the zero/equal bit?
>     } ;
>     //if(_ECX)
>     if(!(_EAX & 0x4000)) //0x40 set in AH
>     {

I think you are using the wrong constant. LAHF loads the 16 bit flags 
register into AH. The zero flag is bit 6 in this register. To compare 
using EAX the extended 32 bit register you need to shift your mask, 
0x0040 left by 16 bits to give 0x00400000.

HTH
Dennis Cote

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