68kMLA Classic Interface
This is a version of the 68kMLA forums for viewing on your favorite old mac. Visitors on modern platforms may prefer the main site.
| Click here to select a new forum. | | Lisa 1 / 2 IO Schematics | Posted by: Pikasoo on 2020-04-20 18:47:15
I recently got my hand on a Lisa 2 computer,
After cleaning and fixing the mess the battery did i got it to boot.
There was a few issue with the 6504 and rom and i still think there is something with the floppy section.
Now the rom apear as H A8, it proprely try to boot on the floppy but the disk get ejected and error 23 come up.
Plugging a floppy emu with valid disk image i get a few read from track 1 3 5 0 then disk eject.
So now i think there is an issue in the logic, the avaible lisaIO schematics are all from the 2/10 one (with the IWC chips)
Is there anywhere i can find the 620-0117-m schematics?
Btw i did test the lisalite boars and the speed divisor does its job
i realy wich i could save this computer!
| Posted by: fri0701 on 2020-04-21 04:57:18
This should be the schematic for your I/O board: http://bitsavers.trailing-edge.com/pdf/apple/lisa/hardware/050-4008-H_IO.pdf
| Posted by: Pikasoo on 2020-04-21 13:20:28
Thank you, this match perfectly!
| Posted by: Brooklyn on 2025-04-04 20:31:46
Updated link and files
| | 1 |
|