-=> Mocking Jerry Coffin to Kurt Wismer <=-
   
 JC> I see a couple of problems, though I'm not sure if they're related to
 JC> the symptoms you're seeing or not.
 
well the litmus test will be if the symptoms go away...
 JC> int 25h leaves an extra word on the stack - if you don't get rid of it
 JC> (typically by popping it into a register) you'll eventually run into
 JC> problems.
 
ah, yes... the flags regsiter...
 JC> This isn't a bug as such, but I'd rewrite this loop:
 JC> mov si, offset buff
 JC> mov cx, 100h
 JC> loop1:
 JC> lodsw
 JC> cmp ax, 0f6f6h
 JC> loopz   loop1
i'll try it...
 KW> writ:
 
 KW>    push dx                  ;save sector index
 
 KW>    mov bx, offset buff + 200h    ;append sector index to buffered
 KW>    mov byte ptr[bx], dh          ;sector for later recovery
 KW>    mov byte ptr[bx + 1], dl
 JC> Umm...unless I'm mistaken, this is overwriting the last byte of the
 JC> sector with the first byte of the sector index number.
 
i don't think so... the sector should be from 0h to 1FFh... that is 200h
bytes, isn't it?
 KW> buff db 202 dup(?)
 JC> In your program you're using 202 HEX bytes, but you're only reserving
 JC> 202 DECIMAL bytes for the buffer...
fixed...
but unfortunately, the litmus test failed... even after implementing all
of your suggestions it's still only outputting a 514 byte file when it
should be outputting a 4626 byte file... weird...
thanks for the suggestion about comparing words though..
... today's mock has been brought to you by the letters p, u, and # pi...**
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