Re: L68K: Re: Afterburner and Linux

From: Bernd Harries <>
Date: Tue, 09 Jun 1998 09:50:59 +0200

Hi Petr!

Will the 68LC030 still be useable somehow when the AB040 is plugged in?
Is there a jumper or a switch?


> - SCSI is very sensitive (when VIDEL generates screen the SCSI
> timeouts and/or produces errors or hangs whole kernel).

When you look at the circuit diagrams you might understand a bit.
Will you come to Oldenburg this year? I can bring my oscilloscope.

> I remember that with a
> certain pre-Nemesis clock-patch I used to run 2.0 kernels in FastRAM
> without problems.

What brings Nemesis with the AB040??

> Since ATABOOT version 3.1 it's impossible to place kernel in FastRAM,
> just because FastRAM is there only if PMMU is correctly programmed.
> During Linux boot the PMMU is reprogrammed so FastRAM disappears...

Can you find out at which physical address of the FastRAM? I had
expected it at 0x01000000. In the Medusa already it is at 0x24000000 or
something depending on the population of the 2 Banks.

> From the lines above it sounds like AB040 is a completely brain-dead
> hardware hack that has a plenty of design bugs and can't actually run.

Isn't the AB040 designed by Gero Anschuetz, the guy who also built the
Eagle 030 TT-clone?.... Are there ACTEL chips on the AB040? Can one
still buy the AB040 new?

BTW: What does your NOVA say so far? Did mach64fb.c work for you? (not

Bernd Harries     Tel. +49 421 809 7351 priv.  | Linux-m68k             +49 421 457 3966 offi.  | Medusa T40
Received on ti. juni 09 1998 - 20:01:00 CEST

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