On Tue, Nov 05, 2019 at 01:33:00PM +1100, Finn Thain wrote:
All the PB 190 machines that I've come across have a late revision 68LC040 CPU that is free of errata. Please see, http://www.mac.linux-m68k.org/docs/faq.php#sec-4.5 The Performa 636 is highly likely to be affected, but you can run Linux from initramfs to avoid page faults in code sections. That would allow you to test the IDE driver. Or you can just replace the CPU with a full 68040, since it is socketed.
I'll try the PB190 first anyway. It should be easier due to not needing to setup a monitor. I'm not sure if I ever booted Linux on either of them, since I acquired both about the time I started getting too busy to spend time on such things. I just found the Performa, and it's actually a Performa 630CD but I don't see any obvious difference based on the specs. I just took a look at the macide driver, and it appears to do basically nothing other than pass a list of addresses into the core ide code. It's one of the smallest drivers I've ever seen.
But watch out for leaking capacitors and batteries...
I should pull out every machine in my collection and look for those sorts of issues. None of them have been checked in at least 5 or 6 years. Brad Boyer flar@xxxxxxxxxxxxx
