elemenoh
Well-known member
I've been restoring a Lisa 2 / Mac XL and am having trouble getting it to boot any images on a FloppyEmu. All images except the Mac Works boot image result in error 42. Per the service manual, this indicates "Disk controller timeout".
Any other areas I should focus on?
- I probed the entire disk controller circuit on the IO board and couldn't find any issues.
- I checked the capacitor on the Lisa Lite card. It had low ESR and no signs of leakage.
- The Mac Works image does boot (over about 5 minutes) but gets sac Mac when the system disk image is 'inserted'.
- I have a known-bad RAM chip (Row E Col 19) that I've ordered a replacement for. Would that chunk of memory interfere with reading from disks?
Any other areas I should focus on?