ms-dos int 11

Thread View: net.micro.pc

4 messages

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

4 total messages Started by ROBIN Fri, 31 Oct 1986 14:54

#8662

Author: ROBIN
Date: Fri, 31 Oct 1986 14:54

17 lines
1117 bytes

I'm new to writing assembly lang. programs on ms-dos machine and was wondering
if someone could answer a question.  Int 11 is supposed to return the
equipment configuration in the AX register.  However I can not seem to get
anything into this register.  When I write a 2 line debug routine as folllows:
-a100
-int 11
-int 20
and then look at the registers, AX is 0000.  Can someone give me some indication
of what I'm dong wrong?

I should mention that this program is being written on an IBM PC/AT, but it doesn't
work on an AT&T 6300 or 6300+ either.

Max S. Robin
AT&T Bell Laboratories
voice:201-386-6865
email:whuts!2212msr

Re: ms-dos int 11

#8694

Author: brown
Date: Mon, 03 Nov 1986 17:10

29 lines
1669 bytes

In article <1038@whuts.UUCP> 2212msr@whuts.UUCP (ROBIN) writes:
>I'm new to writing assembly lang. programs on ms-dos machine and was wondering
>if someone could answer a question.  Int 11 is supposed to return the
>equipment configuration in the AX register.  However I can not seem to get
>anything into this register.  When I write a 2 line debug routine as folllows:
>-a100
>-int 11
>-int 20
>and then look at the registers, AX is 0000.  Can someone give me some
>indication of what I'm dong wrong?
>
>I should mention that this program is being written on an IBM PC/AT, but it
>doesn't work on an AT&T 6300 or 6300+ either.

My first guess is that the int 20 is messing up the AX register.  I suggest
that you use the debug GO option and break your little thing so that debug
will stop on the next address after the int 11.  Debug will then display
the contents of all the registers.

But, do you know what the AX register will be returning?  The information
is bit encoded.

I hope this helps a little bit.
-- 
		  ihnp4------\
		harvard-\     \
Mr. Video	   seismo!uwvax!nicmad!brown
		  topaz-/     /
		 decvax------/

Re: ms-dos int 11

#8716

Author: Robert Belanger
Date: Tue, 04 Nov 1986 17:50

23 lines
1413 bytes

In article <1038@whuts.UUCP> 2212msr@whuts.UUCP (ROBIN) writes:
>I'm new to writing assembly lang. programs on ms-dos machine and was wondering
>if someone could answer a question.  Int 11 is supposed to return the
>equipment configuration in the AX register.  However I can not seem to get
>anything into this register.  When I write a 2 line debug routine as folllows:
>-a100
>-int 11
>-int 20
>and then look at the registers, AX is 0000.  Can someone give me some indication
>of what I'm dong wrong?
>
>I should mention that this program is being written on an IBM PC/AT, but it doesn't
>work on an AT&T 6300 or 6300+ either.
>
>Max S. Robin
>AT&T Bell Laboratories
>voice:201-386-6865
>email:whuts!2212msr


-- 
	Robert Belanger
	...!philabs!micomvax!belanger

Re: ms-dos int 11

#8714

Author: Thomas Hjellming
Date: Tue, 04 Nov 1986 22:49

16 lines
792 bytes

     Try the following from DEBUG/SYMDEB

-a100
-int 11
-<cr>
-g 102      ; assumes that IP=100h!

   Then look at the printed value in the AX register.
This should do it for you.  

Tom Hjellming
Colorado Networks Division
Hewlett-Packard

...!hplabs!hpfcla!hpcnof!thj

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