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echo: os2prog
to: All
from: Bob Liles
date: 1994-11-26 22:14:00
subject: New Problem With Warp

I have a confusing problem with WARP v3.  I wrote a program a LONG time
ago that worked fine under OS/2 v2.0 and OS/2 v2.1, but gives memory
access violation errors under WARP v3.  I wrote it using the 16 bit
system calls from OS/2 v1.x.  (That is the only import library I had at
the time.)  However, now it fails.  It is multi-threaded with a second
thread handling screen output using data supplied by the first thread.
The second thread creates a local variable on the stack and formats
screen output there.  Then calls DOSWRITE to print it.  Below is the
section that actually errors out.

          push 1                ;screen print
          push ss               ;segment containing data
          push dx               ;offset of data in segment
          push di               ;length of data
          push ss               ;segment of receiving variable
          push si               ;offset of receiving variable
          call doswrite         ;system call

For some reason, the call to DOSWRITE won't work now.
---
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