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1. paulrickards (paulrickards@mastodon.social)'s status on Monday, 23-Oct-2023 10:38:32 JST paulrickards

   in reply to

   Hi, I’m a Mac! Sometimes a Lisa. But I’m also just a giant pile of cards 😅

   #AppleLisaClone #RetroComputing

   • paulrickards (paulrickards@mastodon.social)'s status on Monday, 23-Oct-2023 10:38:32 JST paulrickards

     in reply to

     So I was able to borrow both Apple 512K RAM cards, which is awesome! I plugged in the second one and I think there’s an issue. Parity error perhaps?

     #AppleLisaClone #RetroComputing

   • paulrickards (paulrickards@mastodon.social)'s status on Monday, 23-Oct-2023 10:38:32 JST paulrickards

     in reply to

     • DosFox

     A troubleshooting document that @DosFox shared with me mentions using the service mode to peek at some memory locations for clues as to which chip on the 512k card is at fault. I can’t wrap my head around it at the moment, but here are the memory locations. Will need to look at this later.

     #AppleLisaClone #RetroComputing

   • paulrickards (paulrickards@mastodon.social)'s status on Monday, 23-Oct-2023 10:38:33 JST paulrickards

     in reply to

     Inserting a disk (well, selecting one on the FloppyEmu) doesn’t seem to work though. I’m getting an error 38 which means no boot file on disk. So do I have bad disk images? Did I get the floppy interface wiring wrong?’does the FloppyEmu need a special mode to work with the Lisa?

     It does “eject” the disk though so something is working.

     #AppleLisaClone #RetroComputing

   • paulrickards (paulrickards@mastodon.social)'s status on Monday, 23-Oct-2023 10:38:33 JST paulrickards

     in reply to

     • iconicbits

     Thanks to @iconicbits for the tip that the FloppyEmu has a Lisa mode that needs to be set. After that, it boots the Lisa Office System!

     Absolutely amazed that I was able to cobble this thing together. 😅

     I didn’t bring the ArduinoFile with me so I don’t think I can go further with LOS.

     #AppleLisaClone #RetroComputing

   • paulrickards (paulrickards@mastodon.social)'s status on Monday, 23-Oct-2023 10:38:33 JST paulrickards

     in reply to

     I put the SunRem 2MB card (configured with 1.5 MB of memory), bank 2 empty, memory slot 2 empty.

     Well, well. Hello error 45! This conclusively proves there’s a fault with this RAM card.

     #AppleLisaClone #RetroComputing

   • paulrickards (paulrickards@mastodon.social)'s status on Monday, 23-Oct-2023 10:38:34 JST paulrickards

     in reply to

     Ok Apple 512K card installed in the #AppleLisaClone. Will it blend?

     #What RetroComputing

   • paulrickards (paulrickards@mastodon.social)'s status on Monday, 23-Oct-2023 10:38:34 JST paulrickards

     in reply to

     Wowowowow the #AppleLisaClone just passed the startup tests and is asking for a disk!!

     This means my system (and especially the MMU) seems to be working! This also means the SunRem 2MB card may be faulty. Going to test it in the Lisa 2/10 later to confirm.

     #RetroComputing

   • paulrickards (paulrickards@mastodon.social)'s status on Monday, 23-Oct-2023 10:38:35 JST paulrickards

     in reply to

     I asked VintageMicros what kind of memory should be used in the SunRem 2MB RAM card. They sent this picture of SIMMs. The top module looks like the chips are NEC D41256L-12. The sticker says 70ns but doesn’t the -12 denote 120ns?

     #AppleLisaClone #RetroComputing

   • paulrickards (paulrickards@mastodon.social)'s status on Monday, 23-Oct-2023 10:38:35 JST paulrickards

     in reply to

     Today I brought my rig over to Kennet Classic Computer Museum in Kennet Square, PA where Bill has a Lisa 2/10 that he graciously let me take apart to troubleshoot my #AppleLisaClone.

     #RetroComputing

   • paulrickards (paulrickards@mastodon.social)'s status on Monday, 23-Oct-2023 10:38:35 JST paulrickards

     in reply to

     I had a little trouble removing the card cage. There are small metal levers on the corners of the cards to aid in removal. One of them was sticking up too far and caught the case. Fixing that it slid out easily. There are two 512K Apple RAM cards in this machine. It has a VintageMicros sticker on the inside dated Nov 07.

     Let’s pop one of the RAM cards out and see if my rig throws the error 45 again.

     #AppleLisaClone #RetroComputing

   • paulrickards (paulrickards@mastodon.social)'s status on Monday, 23-Oct-2023 10:38:36 JST paulrickards

     An #AppleLisaClone side note: this may be a source for the weird open-side expansion board edge connectors.

     https://edac.net/series/737?fid_p=56&fid_8784=Dual+Row&fid_8785=P.C.+Tail&fid_8788=.550%22+%2813.97mm%29+Notched+Ends

     Mouser has the high-point contact short-tail version in stock. Almost $10/ea! O.o

     https://www.mouser.com/ProductDetail/587-737-056-525-206