BLOCK_MOVE failing on some systems (but never under a debugger)

Thread View: comp.sys.ibm.pc.programmer

1 messages

[T] Back to Threads [V] Tree View [G] Group Articles

1 total messages Started by Daniel Benefiel xtmp user id dep... Mon, 05 Mar 1990 00:31

#1447

Author: Daniel Benefiel xtmp user id dep...
Date: Mon, 05 Mar 1990 00:31

11 lines
876 bytes

I wrote an assembly .COM program to access extended (and primary) memory
using INT 15h BLOCK_MOVE.  On some systems, the INT 15h call fails to do
the transfer when run from the DOS prompt.  On other systems it works fine.
It never fails under any debugger (debug, symdeb, or turbo).

By "fails to transfer" I mean that it transfers nothing (not even garbage).
The failure occurs whether transferring within primary or between primary
and extended.

Any ideas?

Thread Navigation

This is a paginated view of messages in the thread with full content displayed inline.

Messages are displayed in chronological order, with the original post highlighted in green.

Use pagination controls to navigate through all messages in large threads.

Back to All Threads