Oddbean new post about login | logout @16340ea3 @96d079fd Thanks! That’s three now that started bare, built up, and don’t work. Is this a known issue with these boards?
@8ff2c4ef @96d079fd I just assumed I'd done something wrong, or used the wrong part someplace 😅
@16340ea3 @96d079fd Same here. The odds of that are getting less it seems. I wonder how many more have this issue?
@16340ea3 @96d079fd Looking at the BOM and the card, I didn't notice that U5,6,7 was S373 and U9,11 was LS373. I got all S373. How critical is that? What did you folks use on your cards?
@8ff2c4ef @16340ea3 I have LS in U9,11 and S in U5,6,7 per the BOM.
@96d079fd @16340ea3 Can you get into Service Mode (CMD-S) and read memory locations? What do you get for $294-297 and $2A8-2AB?
@8ff2c4ef @16340ea3 Does this have what you need? https://files.mastodon.social/media_attachments/files/111/132/765/667/558/270/original/2448139a45aed69c.jpeg
@96d079fd @16340ea3 Looks like your total RAM is also showing as 128KB just like mine. What type of RAM are you using? Can you share a photo of the board?
@8ff2c4ef @16340ea3 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
@96d079fd @16340ea3 Thanks! I have those NMBS modules as well and so far they are the only thing that’s close to working. I have two other sets (OKI and Fairchild) that don’t seem to work.
@8ff2c4ef @16340ea3 I looked through my notes and NMBS is what VintageMicros provided in the kit. The Samsung modules I picked up later hoping it was a RAM issue.
@96d079fd @16340ea3 Good to know, thanks!
@8ff2c4ef @16340ea3 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
