68kMLA Classic Interface

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Unusual 512k

Posted by: bibilit on 2017-06-05 12:49:57 A friend of mine brought me a 512k to have a look at it. Hanging from the rear bucket was a small cable just above the external floppy connector, my first thought was that the previous owner managed some sort of hack to get a connector a bit more flexible. removing the rear bucket, the cable was connected to the logic board, but the Logic bard itself was unusual. Instead of the 512 k board expected, the board is a Macintosh (128) with a memory expansion board on top of it... and another board connected to the processor. Looking at the chip made it clear, the cable is a SCSI one The Logic Board was nicely upgraded, the memory can be removed (the 512 will not boot), but not the small board, each pin is soldered to a processor leg. The boards were made in France, but i have been unable to find any information. The big mystery, as the whole amount of memory is still 512k, what was the point of removing a 512 board to get a 128 (heavily modified) to suit ? So either the original board was bad, or the owner needed a SCSI hard drive. The 512 is using a 800k FD. Apart from little work in both the Analog Board and Logic Board area, plus cleaning the FD, no problem has been found.

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