Re: [PATCH v7 0/8] Mac Old World ROM experiment

[BALATON Zoltan]

On Thu, 2 Jul 2020, Howard Spoelstra wrote:
> The boing is beautiful when g3beige/screamer with increased buffer size
> boots the G3 rom ;-)

Try it without my RFC I2C patches (checkout the one before i2c which is 
"mac_oldworld: Change PCI address of macio to match real hardware" then 
build that). With that a crashing sound is heard and you get > prompt 
where you can type ? to see a hardware test menu (but most tests don't 
seem to return anything useful and the ROM checksum is failing, seems to 
read from wrong address). I've shown that here:

https://lists.nongnu.org/archive/html/qemu-ppc/2020-06/msg00239.html

I've never seen that on real hardware but I don't have much experience 
with old Macs. I guess you'd get the same if you removed all RAM from a 
machine and connected a serial terminal (in case you have a real beige 
G3). This might also be useful to test emulation if someone wants to 
investigate.

Regards,
BALATON Zoltan