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Jemm v5.66 : exception 09 on Intel P4 w/ Ultra IDE BIOS ext. (DOSX)

posted by Rugxulo Homepage, Usono, 07.09.2007, 04:29

> Is this related to Jemm? Does changing video modes work faster with other
> EMMs?
No, just an observation, I'm using it now, it's probably just an old monitor (ViewSonic 15G, looks old at least, heh).

My aunts' HP Pavillion (HP BIOS v3.21 ?, Intel Pentium 4, 2 Ghz, 512 MB RAM) doesn't like JEMM at all (my FreeDOS bootdisk #1) except with the ultra conservative X=A000-FFFF NOHI NOINVLPG NOVME. Everything else I tried resulting in a constant stream of reg dumps immediately after loading, even before finished booting (I think ... too fast to read, Pause key doesn't work, Ctrl-Alt-Del won't work either). Other computers are much more reliable with JEMM (esp. P166 and 486, work fine). I almost want to speculate, but I won't. :-P

> > > There is a chance that loading 386SWAT can show more details (the
> > > EIP register content). Or, if 386SWAT cannot help, a slight
> > > modification in Jemm will display this register.
> >
> > Before it crashes?
>
> Yes of course. IIRC 386SWAT can be loaded in CONFIG.SYS only.
Yeah, device driver only.

> If you are familiar with 386SWAT it might be a good idea, if no it is
> possibly not worth the try.
I've used it before, but I never "mastered" it or anything. But maybe I'll try. Have to make another bootdisk for other testing anyways. ;-)

---
Know your limits.h

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