iconicbits / is on Nostr

All things #retrocomputing, #electronics and associated repair.

Last Notes

2024-08-13 02:15:31

Also installed an Interware Booster clone (50-SE30F by zigzagjoe) in my SE/30. Provides a 50MHz CPU and FPU; just remove the existing CPU and plug it in, no drivers needed. #applese30
https://files.mastodon.social/media_attachments/files/112/952/300/515/834/846/original/f3ec6cb6e2bdd7aa.jpeg

2023-10-17 19:44:40

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@npub13le…6saf Yes, it boots LOS and MacOS successfully and has 2MB installed as the only board in the system. Warmech pointed me towards some problem grounds to he'd encountered while reverse engineering an authentic board and it turned out one of those grounds was indeed missing.

2023-09-27 17:35:15

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@npub13le…6saf Prefect, just wanted to make sure. :)

2023-09-27 16:31:16

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@npub13le…6saf You do have to set it to Lisa 3.5 Floppy under Disk Emulation Mode if you haven't already. It's been a while since I messed with it though.

2023-09-27 06:26:01

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@npub13le…6saf @npub1zc6…p2sj I'm not sure how useful this is, but here's a photo of a Rev "A" SunRem board I saw on eBay a while ago - a little different layout.
https://files.mastodon.social/media_attachments/files/111/135/679/236/105/994/original/164286e51335cd00.jpg

2023-09-26 18:17:25

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@npub13le…6saf @npub1zc6…p2sj Sure, here's a photo of the board with the 80ns NMBS marked RAM, and 120ns Samsung (just two modules of the set shown).
https://files.mastodon.social/media_attachments/files/111/132/818/286/582/148/original/5ae59b4bf5075ff2.jpeg
https://files.mastodon.social/media_attachments/files/111/132/818/846/445/855/original/6d5bf30e7be1de46.jpeg

2023-09-26 13:32:56

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@npub13le…6saf It does indeed. And here I thought VintageMicros was going through NOS on there. :)

2023-09-26 13:20:41

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@npub13le…6saf Yep, I have two 512K cards I normally use. I put one of those in slot 2, removed the mem 4 SIMMs and removed the mem 4 jumper and I get hi/lo with code 45 and the startup screen.
https://files.mastodon.social/media_attachments/files/111/131/651/925/395/727/original/8ae2101f939f18fc.jpeg

2023-09-26 12:40:41

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@npub13le…6saf They're the same tone - I'm not sure if it's hi or lo without a note to compare to (I would have guessed hi). The card is fully populated; I tried 120ns and 80ns sets (one set was provided, the other I bought after). The garbage is static.

2023-09-25 18:15:01

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@npub13le…6saf Hopefully you can get it figured out! Looks very similar to mine, including the plastic sockets.