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1. paulrickards (paulrickards@mastodon.social)'s status on Monday, 23-Oct-2023 10:38:56 JST paulrickards

   • DosFox

   Well, I just placed orders for boards and parts to build a new Lisa 2/5 around my existing Lisa CPU card, the only part of a Lisa I’ve ever owned.

   I would never have thought this was possible if it weren’t for the work of @DosFox who recently built the first new Lisa since 1986! Thanks for the inspiration!

   I’ll continue this thread as parts roll in. I may ask (beg) if folks have some parts in your bins! 😀

   #RetroComputing #VintageComputing #AppleLisa #AppleLisaClone

   • paulrickards (paulrickards@mastodon.social)'s status on Monday, 23-Oct-2023 10:38:45 JST paulrickards

     in reply to

     The brand new Apple Lisa parallel card is complete! That NEC D2716D EPROM took longer than it should to program (note: 21V to program!)

     Now to figure out the edge connector for it. Notice the one side isn’t cut out like the other?

     #AppleLisaClone #RetroComputing

   • paulrickards (paulrickards@mastodon.social)'s status on Monday, 23-Oct-2023 10:38:45 JST paulrickards

     in reply to

     Built another 27C512 EPROM to 6309 PROM footprint adapter. This one will go in the IO board to control the floppy drive. I’m now using these small protoboards with are a good fit. I plan on adding a GAL socket to the right to make it a dual purpose adapter so both can be tested.

     Link to boards: https://amzn.to/3PkhupI

     #AppleLisaClone #RetroComputing

   • paulrickards (paulrickards@mastodon.social)'s status on Monday, 23-Oct-2023 10:38:46 JST paulrickards

     in reply to

     I have one set of #AppleLisaClone boards for sale in the USA: the I/O board, motherboard, LisATX board, and card risers/extenders for diagnostics. You provide your own CPU and RAM cards. DM me if interested!

     https://mastodon.social/@paulrickards/110928832453750692

   • paulrickards (paulrickards@mastodon.social)'s status on Monday, 23-Oct-2023 10:38:46 JST paulrickards

     in reply to

     Let’s build up a two port parallel card for the #AppleLisaClone! I wasn’t expecting to build one of these, at least for a while but I accidentally ordered the parts for it (which was confusing at first, trying to find locations for mystery parts with no boards for it). 😅

     #RetroComputing

   • paulrickards (paulrickards@mastodon.social)'s status on Monday, 23-Oct-2023 10:38:46 JST paulrickards

     in reply to

     Soldering complete! All sockets and passives installed on the Lisa parallel card.

     #AppleLisaClone #RetroComputing

   • paulrickards (paulrickards@mastodon.social)'s status on Monday, 23-Oct-2023 10:38:47 JST paulrickards

     in reply to

     I'm falling down a rabbit hole learning how to use WinCUPL to program a GAL22V10 to replace the PROMs in the #AppleLisaClone. I think I have a PLD file created with the PROM contents but keep running out of product terms for one output. I guess this would require hand optimization to fit within the limits of the GAL.

   • paulrickards (paulrickards@mastodon.social)'s status on Monday, 23-Oct-2023 10:38:47 JST paulrickards

     in reply to

     Since I’m impatient waiting for my boards to be delivered, I created a 27C512 EPROM to 6309 footprint adapter (more than just DuPont wires this time) for the #AppleLisaClone CPU card. It too reads fine in the EPROM burner, masquerading as a 6309 properly.

     #RetroComputing

   • paulrickards (paulrickards@mastodon.social)'s status on Monday, 23-Oct-2023 10:38:47 JST paulrickards

     in reply to

     Plugged in the 6309 “VSROM” emulator into the (original) CPU board of the #AppleLisaClone along with the two missing ROMs and the 68000. That completes this board.

     Hopefully some more parts for the IO board will be arriving soon.

     #RetroComputing

   • paulrickards (paulrickards@mastodon.social)'s status on Monday, 23-Oct-2023 10:38:48 JST paulrickards

     in reply to

     #ArcaneByte #mac2lisa keyboard adapter. This allows me to use a Mac 128/512 or Plus keyboard with the #AppleLisaClone There’s also a version that has ADB but I decided to go with a Plus keyboard because it looks the part.

     #RetroComputing

   • paulrickards (paulrickards@mastodon.social)'s status on Monday, 23-Oct-2023 10:38:48 JST paulrickards

     in reply to

     More work on the #AppleLisaClone I/O board, installing the chips, diodes, and transistors. The last remaining parts are inbound.

     #RetroComputing

   • paulrickards (paulrickards@mastodon.social)'s status on Monday, 23-Oct-2023 10:38:49 JST paulrickards

     in reply to

     I/O board passives mostly installed.

     #AppleLisaClone #RetroComputing

   • paulrickards (paulrickards@mastodon.social)'s status on Monday, 23-Oct-2023 10:38:49 JST paulrickards

     in reply to

     Started building the ArduinoFile emulator and the COPS emulator.

     #AppleLisaClone #RetroComputing #

   • paulrickards (paulrickards@mastodon.social)'s status on Monday, 23-Oct-2023 10:38:49 JST paulrickards

     in reply to

     Created the power cable harness (and cable laced it!) between the power supply and the motherboard.

     #AppleLisaClone #RetroComputing

   • paulrickards (paulrickards@mastodon.social)'s status on Monday, 23-Oct-2023 10:38:50 JST paulrickards

     in reply to

     #AppleLisaClone motherboard done! ✅ I’ll add expansion slots and resolve the missing, hard to source video connector later.

     #RetroComputing

   • paulrickards (paulrickards@mastodon.social)'s status on Monday, 23-Oct-2023 10:38:50 JST paulrickards

     in reply to

     Next up: the I/O board.: sockets done!

     #AppleLisaClone #RetroComputing

   • paulrickards (paulrickards@mastodon.social)'s status on Monday, 23-Oct-2023 10:38:51 JST paulrickards

     in reply to

     Then burned it to the W27C512 EEPROM.

     Then I prototyped the board with jumpers to a breadboard and tried it to see if we can at least fool the MiniPRO into thinking the 27C512 is a 82S135 (6309 read equiv).

     Happy to report that it works so I’ve at least swizzled the pins in the right order! Won’t know for sure until it’s in circuit but it’s promising.

     #AppleLisaClone #RetroComputing

   • paulrickards (paulrickards@mastodon.social)'s status on Monday, 23-Oct-2023 10:38:51 JST paulrickards

     in reply to

     Some folks asked for the link to the MiniPRO command line tools I used: https://gitlab.com/DavidGriffith/minipro

     It can read PROMs but not write them. Although I’m not sure what’s stopping it, other than knowing the programming procedures for each PROM and writing the code for it..

   • paulrickards (paulrickards@mastodon.social)'s status on Monday, 23-Oct-2023 10:38:51 JST paulrickards

     in reply to

     It begins.

     #AppleLisaClone #RetroComputing

   • paulrickards (paulrickards@mastodon.social)'s status on Monday, 23-Oct-2023 10:38:52 JST paulrickards

     in reply to

     I ordered these 27C512 EPROM to 6309 PROM adapter boards last night so we’ll know if they work eventually.

     #AppleLisaClone #RetroComputing

   • paulrickards (paulrickards@mastodon.social)'s status on Monday, 23-Oct-2023 10:38:52 JST paulrickards

     in reply to

     I noticed that there was an open source command line tool made for the MiniPRO TL866xx series of USB EPROM burners. It includes the ability to read bipolar PROMs (specifically the 82S135), something the provided GUI software can’t do!

     First I concatenated the PROM code (256 bytes) 256 times to reach the 65536 bytes of the EEPROM (a Winbond W27C512-45Z).

     #AppleLisaClone #RetroComputing

   • paulrickards (paulrickards@mastodon.social)'s status on Monday, 23-Oct-2023 10:38:53 JST paulrickards

     in reply to

     68000 processor checking in for Lisa duty. The size! Are there chips in a DIP package larger than this?

     #RetroComputing

   • paulrickards (paulrickards@mastodon.social)'s status on Monday, 23-Oct-2023 10:38:53 JST paulrickards

     in reply to

     I've been pondering another strategy for the Lisa PROMs needed for the #AppleLisaClone project. Could an (E)EPROM be used instead? With the appropriate adapter and fast enough response time, might it work? I think vintage arcade folks do this now. I've successfully used EPROMs before in a #C64 for the PLA.

     I have a stash of W27C512 that are 45ns which I think is fast enough to replace a MMI 6309. There would be a lot of wasted space but who cares?

     Thoughts?

     #RetroComputing

   • paulrickards (paulrickards@mastodon.social)'s status on Monday, 23-Oct-2023 10:38:53 JST paulrickards

     in reply to

     I created this adapter board for a 27C512 EPROM to work in place of a MMI 6309 PROM. I'll think about this some more and maybe order some boards to try it. $5.50 for three at OSH Park, not bad.

     #RetroComputing

   • paulrickards (paulrickards@mastodon.social)'s status on Monday, 23-Oct-2023 10:38:54 JST paulrickards

     in reply to

     Some parts from eBay (China and India) have arrival estimates as late as Oct 26 😬 Maybe it’ll come sooner 🤞

   • paulrickards (paulrickards@mastodon.social)'s status on Monday, 23-Oct-2023 10:38:54 JST paulrickards

     in reply to

     6504 from 1989 reporting for Lisa duty 😃

     #RetroComputing

   • paulrickards (paulrickards@mastodon.social)'s status on Monday, 23-Oct-2023 10:38:54 JST paulrickards

     in reply to

     Can I use a Mac 128k/Plus mouse (DB-9) on a Lisa 2/5 (DB-9)? I'm hoping they're the same mouse inside, despite differing button sizes and labels on the bottom.

     *Edit: The consensus is yes you can!

     #RetroComputing

   • paulrickards (paulrickards@mastodon.social)'s status on Monday, 23-Oct-2023 10:38:55 JST paulrickards

     in reply to

     Since the minimum order for PCBs was 5 and I only need one, I’ll have 4 boards each of the Apple Lisa motherboard, IO board, LisATX board, and diagnostic/riser cards to sell. I’m in USA. Send me a DM if interested!

   • paulrickards (paulrickards@mastodon.social)'s status on Monday, 23-Oct-2023 10:38:56 JST paulrickards

     in reply to

     Anyone have a Lisa RAM card they'd want to sell me? (hopefully better than the current eBay listing of $229.)

     (Thx for a boost!)

     #RetroComputing #VintageComputing #AppleLisa #VintageMac #VintageApple

   • paulrickards (paulrickards@mastodon.social)'s status on Monday, 23-Oct-2023 10:38:56 JST paulrickards

     in reply to

     A pile of boards and parts have started to arrive for the Lisa Clone! Still more parts to arrive.. #AppleLisaClone #RetroComputing