Ram, ram, ram, it's all about ram! :b&w:
Thanks to JDW who asked for a close inspection of the logic board and Dennis who suggested hardware modifications depending on the Ram amount, I think I got it solved…
I had that page in my bookmarks for a while. It's in french, but it's basically a descriptive page about the Plus' specs. But the small table at the bottom got my attention, and it shouldn't be too difficult to understand, even if it's in french. A resistor in R8/R9 has to be cut depending on the Ram configuration. With the ports facing up, it's on the left edge of the board, at the same height than the analog board connector.
The resistor is cut on both of my Plus boards, so it means, according to the table, that I can have either 2x 1Mb in bank A and 2x 256Kb in bank B, or 4x 1Mb.
And it appears that I had messed up my simms one way or another, the faulty board was simply loaded with 4x 256Ko.
Good news: both of my boards works fine, all I have to do is look through my stuff for 6 more 1Mb simms, and they'll be fully loaded!
Bad news: During my heavy board switching I've done something wrong and killed the sound: no more startup beep, no more system beep, only silence! That's strange, since I haven't touched neither the analog board not the speaker cables… >
Anyway, thank you all for helping solve my first issue posted around 68kmla so quick!
Thanks to JDW who asked for a close inspection of the logic board and Dennis who suggested hardware modifications depending on the Ram amount, I think I got it solved…
I had that page in my bookmarks for a while. It's in french, but it's basically a descriptive page about the Plus' specs. But the small table at the bottom got my attention, and it shouldn't be too difficult to understand, even if it's in french. A resistor in R8/R9 has to be cut depending on the Ram configuration. With the ports facing up, it's on the left edge of the board, at the same height than the analog board connector.
The resistor is cut on both of my Plus boards, so it means, according to the table, that I can have either 2x 1Mb in bank A and 2x 256Kb in bank B, or 4x 1Mb.
And it appears that I had messed up my simms one way or another, the faulty board was simply loaded with 4x 256Ko.
Good news: both of my boards works fine, all I have to do is look through my stuff for 6 more 1Mb simms, and they'll be fully loaded!
Bad news: During my heavy board switching I've done something wrong and killed the sound: no more startup beep, no more system beep, only silence! That's strange, since I haven't touched neither the analog board not the speaker cables… >
Anyway, thank you all for helping solve my first issue posted around 68kmla so quick!