Coprocessor exceptions under DPMI

Thread View: comp.os.msdos.programmer

1 messages

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

1 total messages Started by Duncan Murdoch Sun, 24 Jan 1993 01:05

#7704

Author: Duncan Murdoch
Date: Sun, 24 Jan 1993 01:05

13 lines
1059 bytes

I'm trying to figure out why Borland Pascal's protected mode programs mess up
the handling of coprocessor errors.  Reading the 486 manual, I see that 
INT 10h will be generated when an error occurs on the coprocessor, provided 
the "NE bit" is set in CR0.  

Under DPMI, I don't seem to be getting any exceptions generated.  I suspect 
this is because the NE bit isn't set, but I can't see any way to find out.
Is there some DPMI service that could tell me this?  All I get is exception
13 when I try to read it by "mov eax,cr0".  Even more to the point:  is there
any way to set the bit?

Duncan Murdoch
dmurdoch@mast.queensu.ca

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