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echo: 80xxx
to: GINNY BAAS (Rcvd)
from: BRIAN MCCLOUD
date: 1997-07-01 15:38:00
subject: FISUBR

GB>I was using debug to do some low-level mods on one of my programs, when
GB>I noticed an interesting opcode in unallocated memory.
GB>The HEX value DA2B represented the assembler instructioN:
GB>FISUBR DWORD PTR [BP+DI]
GB>Obviosly this was just a random pair of bytes, but anyways, what the
GB>@#$% does FISUBR do?
Replaces ST (Stack Top, I think) with the original value in ST subtracted 
rom
the 32-bit integer found in the location specified.  The name of the
instruction stands for Floating-point math Integer SUBtract Reversed.
((Cloud))
MauveCloud@juno.com
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