On 2023-07-29 13:36, Paul Koning via cctalk wrote:
The Pro Technical Manual (on Bitsavers) answers a bunch of these questions. If I remember right, the 380 will accept 350 memory daugher cards but also larger-capacity cards (bigger chips) that are 380 only. Also, the wiring for the board allows for larger memories than what DEC actually built; the details are in the CPU/Motherboard chapter of the manual. And/or in the schematics. I've thought about building such a daughtercard, I think the best case allows close to full 4 MB worth of memory.
Seems that a 3 MB module could be built, giving a 3.5 MB total?
