Deep diving into buss error handling by reviewing the previous posts and the Lisa Boot ROM assembly.

http://bitsavers.org/pdf/apple/lisa/firmware/Lisa_Boot_ROM_Asm_Listing.TEXT

If I understand this correctly, memory $282 should hold the address that caused the bus error. In my case, I get

282 0002 0000

which I think is $020000 (high byte is ignored). Does that mean the problem is occurring at position 128kbytes in the RAM card? Not sure how to map that to a component/components yet.

#AppleLisaClone #RetroComputing