Print

[rjm2k]

It's been a long time since I had to do any assembler, so I might be on the wrong track here, but as far as I can remember:-

PROC    WAIT_1      FAR
   pusha
   push es
   mov  dx, [word 40H:006EH]      'Move the word at this address into DX
   mov  [startDisplay], dx              'Move the contents of DX into the address startDisplay
   
continue:
   mov  dx, [word 40H:006EH]      'Move the word at this address into DX (nb, DX now = startDisplay
   sub  dx, [startDisplay]              'submit startDisplay from DX, which should give 0
   cmp  dx, 12H                            'compare dx with 12h
   je   return                                'if dx = 12 (which it can't because it's 0) goto return
   jmp  continue           'go back to continue, which performs EXACTLY the same steps again with the same outcome
   
return:
   pop es
   popa
   ret 4
ENDP   WAIT_1

[mazir]

Maybe I should add that the address 40H:006EH gets one added to it ever 1/18.2 seconds.  It's the real time clock interrupt.

Sorry I didn't mention this earlier.  Thanks for the reply.

[rjm2k]

QUOTE (mazir @ May 22 2003, 12:05 AM)

Maybe I should add that the address 40H:006EH gets one added to it ever 1/18.2 seconds.  It's the real time clock interrupt. Sorry I didn't mention this earlier.  Thanks for the reply.

Maybe it's a timing issue, it could be skipping 12.  Try using jump greater if there is one.