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Re: "BUG: soft lockup" on A1200; was: Re: Updated installation images for Debian Ports 2019-04-20


On Wed, 11 Dec 2019, Geert Uytterhoeven wrote:

> > (BTW, if any kernel developer wants to take a look, I can make the A1200
> > or the A4000 remotely accessible, via a Raspberry Pi. Serial console, and
> > hardware-reset for the Amiga via RPi GPIO. On boot it would just fetch a
> > new kernel from the RPi (from AmigaOS), before trying to boot it. So if
> > anyone feels like debugging this, it's there. We've done this before for
> > debugging the MorphOS kernel on the same hardware, worked quite well.)
> Just wondering: how do you reset the A4000 remotely?
> By pulling the keyboard clockline low? By controlling power?
> Anything else?

We made an adapter which with a PLCC socket, which piggybacks the Fat Gary
chip, and exposes the _KBRESET line coming from Pin 36 or so on a Pin
header. So you can hook it up to and pull that line from the RPi GPIO,
effectively causing a hardware reset.

A similar hack is possible with the Gayle chip on the A1200, and some
"PCMCIA reset fix" Gayle-piggyback adapters available at some retro HW
resellers already expose this pin.

Some details here: https://www.amigaworld.de/workshops/reset-am-amiga/ (in


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