Oddbean new post about login | logout @96d079fd Bummer! Same tone (lo)? Is the card fully populated with SIMMs? Is display “static” garbage or is it constantly moving?
@8ff2c4ef 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.
@96d079fd You have a 512K card to try in another slot with the 2MB card? I tried the 1MB setting with four SIMMs and got what you described. Only when I added four more SIMMs (and not adding jumpers for banks 2 and 3) did I get a picture. There’s something weird happening. I have a video in this thread (starts with color bars) that has both lo and hi tones for comparison.
@8ff2c4ef 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
@96d079fd Oh wow this is interesting— a bus error as well! I’m curious if there’s a fault with these boards? Does yours have a white silkscreen ID front lower left “42779GY151-190514” ? I think that is a JLCPCB order code.
@8ff2c4ef It does indeed. And here I thought VintageMicros was going through NOS on there. :)
@96d079fd I have no idea, just that our boards are from the same batch is all I can say at this point. That could mean that our boards have the same issue. More testing to be done! I’m going to try to get access to a working Lisa, hopefully tomorrow.
