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Sorry, I forgot to add that I'm located in Europe, so my order options are somewhat limited when taking customs and shipping costs into account. My intention of this post was that there is maybe such a cable used for a different machine/product which can be repurposed as a serial cable for...

When things work out the way I hope I soon will have an second compact Mac, an SE30 in good working order. I want to equip this machine with an BlueSCSI and want to use it as some sort of bridge machine for my other compact Mac. I learned that a simple Mini DIN can be used build a machine to...

To finish this thread I can happily report that the machine is running fine with the mixed RAM modules. I ran Snooper RAM test in a loop for a while now and it seems fine.

Removing the jumper is what I did. Thanks for the link to the memory guide. The guide notes to put the memory modules in slot 3/4 for a 2mb config. I found it out trial an error. Then it states for a 2,5mb config to put the higher density modules (aka the 1mb ones) in slot 1/2. The table tells...

I fiddled around with the RAM modules out of pure interest. Two modules in Slot 1 and 2 and I have a sad Mac. The same modules in Slot 3 and 4 and the machine starts. Then I mixed modules which I normally wont do. Two Siemens modules in Slot 1 and 2, and two Samsung ones in 3 and 4, the machine...

I did this unfortunately without any effect.

I found SE schematics at https://archive.org/download/Macintosh68kSchematics but they are barely readable. Are there any better ones somewhere? Arent all adress lines used when only half the capacity is set? Also the second line changes every time I power the machine up. This leads me to believe...

Hello there, I'm new to the classic Mac world and bought me an SE FDHD recently. Unfortunately this was battery bombed and probably beyond repair. I got me a replacement motherboard which once was an original Apple repair part. The board does look ununsed. I installed 4 identical 1MB SIMM...