Groups > comp.os.msdos.programmer > #142

Re: Running (Free)DOS from ROM

From	"Rod Pemberton" <do_not_have@noavailemail.cmm>
Newsgroups	comp.os.msdos.programmer, comp.os.msdos.misc, alt.os.free-dos
Subject	Re: Running (Free)DOS from ROM
Date	2011-08-15 03:42 -0400
Organization	Aioe.org NNTP Server
Message-ID	<j2aima$f57$1@speranza.aioe.org> (permalink)
References	(1 earlier) <j1irmm$gjr$1@speranza.aioe.org> <6e31a256-92cf-4746-ad84-375bf8a160cb@b19g2000yqj.googlegroups.com> <8aa88c74-8511-4148-bbe3-2994ff90e17e@t30g2000prm.googlegroups.com> <j27qdl$k8d$1@speranza.aioe.org> <ac8e56ee-e83d-4cb4-be26-39701e4d080d@j37g2000prh.googlegroups.com>

Cross-posted to 3 groups.

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"monahanz" <monahan@vitasoft.org> wrote in message
news:ac8e56ee-e83d-4cb4-be26-39701e4d080d@j37g2000prh.googlegroups.com...
>
> I would go to a V3.0 however the boot hangs on my hardware. The
> problem is I am adapting my BIOS for a non PC setup (S100 System).
> There must be something different in the Int calls in 3.0 that is not
> in 2.0. I just cannot figure it out - still looking.  What I cannot
> understand is that I have an "unimplemented INT trap" for all the 8086
> Ints., yet it picks up nothing. Must be looking for some unusual
> returned value in the same Ints I implement for V2.0
>

Have you implemented a BIOS interrupt trace?

You could print out to the screen which BIOS Int is called, it's AX, and
maybe BX.

Or, you could use the TF cpu flag to trace the assembly, but that requires a
bit more work.

For personal use, I've written a few DOS TSRs that trace interrupts.  They
write to the last line in a narrow column on the right hand side of the
screen.  I use Int 10h, AH=06h "SCROLL UP WINDOW" to set the text window
area and to scroll the output in that column up.  If you save the last
interrupt, you can compare it and only output new interrupts.  I output an
asterisk if the interrupt is repeated.  I'd think that should work for BIOS
also as long as the text screen is setup correctly.


Rod Pemberton

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Thread

Running (Free)DOS from ROM Ruud <ruud.baltissen@gmail.com> - 2011-08-05 10:08 -0700
  Re: Running (Free)DOS from ROM Ross Ridge <rridge@csclub.uwaterloo.ca> - 2011-08-05 14:20 -0400
  Re: Running (Free)DOS from ROM "Rod Pemberton" <do_not_have@noavailemail.cmm> - 2011-08-06 03:49 -0400
    Re: Running (Free)DOS from ROM Ruud <ruud.baltissen@gmail.com> - 2011-08-10 09:54 -0700
      Re: Running (Free)DOS from ROM monahanz <monahan@vitasoft.org> - 2011-08-12 10:17 -0700
        Re: Running (Free)DOS from ROM Ross Ridge <rridge@csclub.uwaterloo.ca> - 2011-08-12 14:54 -0400
          Re: Running (Free)DOS from ROM monahanz <monahan@vitasoft.org> - 2011-08-12 14:54 -0700
            Re: Running (Free)DOS from ROM Single Stage to Orbit <alex.buell@munted.org.uk> - 2011-08-12 23:22 +0100
            Re: Running (Free)DOS from ROM "Esra Sdrawkcab" <admin@127.0.0.1> - 2011-08-17 18:18 +0100
        Re: Running (Free)DOS from ROM Single Stage to Orbit <alex.buell@munted.org.uk> - 2011-08-12 22:54 +0100
          Re: Running (Free)DOS from ROM monahanz <monahan@vitasoft.org> - 2011-08-12 15:45 -0700
            Re: Running (Free)DOS from ROM monahanz <monahan@vitasoft.org> - 2011-08-12 18:38 -0700
              Re: Running (Free)DOS from ROM Ross Ridge <rridge@csclub.uwaterloo.ca> - 2011-08-12 23:40 -0400
                Re: Running (Free)DOS from ROM monahanz <monahan@vitasoft.org> - 2011-08-13 09:46 -0700
                Re: Running (Free)DOS from ROM monahanz <monahan@vitasoft.org> - 2011-08-13 16:04 -0700
                Re: Running (Free)DOS from ROM Kalle Olavi Niemitalo <kon@iki.fi> - 2011-08-14 12:35 +0300
                Re: Running (Free)DOS from ROM monahanz <monahan@vitasoft.org> - 2011-08-14 09:48 -0700
        Re: Running (Free)DOS from ROM "Rod Pemberton" <do_not_have@noavailemail.cmm> - 2011-08-14 02:36 -0400
          Re: Running (Free)DOS from ROM monahanz <monahan@vitasoft.org> - 2011-08-14 10:04 -0700
            Re: Running (Free)DOS from ROM "Rod Pemberton" <do_not_have@noavailemail.cmm> - 2011-08-15 03:42 -0400
              Re: Running (Free)DOS from ROM monahanz <monahan@vitasoft.org> - 2011-08-15 10:05 -0700
        Re: Running (Free)DOS from ROM Ruud <ruud.baltissen@gmail.com> - 2011-08-14 00:33 -0700
          Re: Running (Free)DOS from ROM monahanz <monahan@vitasoft.org> - 2011-08-14 10:09 -0700
            Re: Running (Free)DOS from ROM Ruud <ruud.baltissen@gmail.com> - 2011-08-15 12:44 -0700
              Re: Running (Free)DOS from ROM monahanz <monahan@vitasoft.org> - 2011-08-16 16:05 -0700
                Re: Running (Free)DOS from ROM "Rod Pemberton" <do_not_have@noavailemail.cmm> - 2011-08-17 07:01 -0400
                Re: Running (Free)DOS from ROM monahanz <monahan@vitasoft.org> - 2011-08-17 11:07 -0700
                Re: Running (Free)DOS from ROM "Rod Pemberton" <do_not_have@noavailemail.cmm> - 2011-08-18 03:26 -0400
                Re: Running (Free)DOS from ROM dg1261 <dgREMOVE-THIS1261@cs.com> - 2011-08-18 08:18 +0000
                Re: Running (Free)DOS from ROM monahanz <monahan@vitasoft.org> - 2011-08-18 10:23 -0700
                Re: Running (Free)DOS from ROM Jim Leonard <mobygamer@gmail.com> - 2011-08-18 11:20 -0700
                Re: Running (Free)DOS from ROM monahanz <monahan@vitasoft.org> - 2011-08-18 17:29 -0700
                Re: Running (Free)DOS from ROM "Rod Pemberton" <do_not_have@noavailemail.cmm> - 2011-08-19 03:52 -0400
                Re: Running (Free)DOS from ROM dg1261 <dgREMOVE-THIS1261@cs.com> - 2011-08-19 00:30 +0000
                Re: Running (Free)DOS from ROM monahanz <monahan@vitasoft.org> - 2011-08-20 17:08 -0700
                Re: Running (Free)DOS from ROM "s_dubrovich@yahoo.com" <s_dubrovich@yahoo.com> - 2011-09-01 17:34 -0700

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