First post, by ALEKS
Lately I built some SIMM memories for personal use. I am using them with 80386 machines.
I know there are other newly made SIMMs. But I would just like to also share my project with you.
Unfortunately I wasn't paying attention that SIMM sockets expect 1.2 mm PCB thickness. Mine are 1.6 mm and they are stressing the SIMM sockets. Even though these PCBs work, I will have to redo these PCBs in the future.
The PCB layout is entirely hand routed on 4 layers. Top and bottom layers are signals and inner top and inner bottom are power planes.
I tested these modules with Memtest86+ and everything works as expected.
I now have enough RAM on my 386 computer. 4 of them are 16 Mb and 8 of these things have a whopping 32 Mb.
Intel 80386DX / 33 MHz | 32 Mb RAM | Tseng Labs ET4000/W32i with 2 Mb RAM | ISA I/O Interface | ISA Audio Interface | 3.5" & 5.25" FDD | 4 x CF 512 Mb | Intel EtherExpress 16