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iconicbits | 1 years ago (raw) | root | parent | reply | flag 
 @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
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paulrickards | 1 years ago (raw) | root | parent | reply | flag 
 @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.
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iconicbits | 1 years ago (raw) | root | parent | reply | flag 
 @8ff2c4ef It does indeed. And here I thought VintageMicros was going through NOS on there. :)
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paulrickards | 1 years ago (raw) | root | parent | reply | flag 
 @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.