First post, by pentiumspeed
4mb DIMMs are plentiful and easy to get to harvest for 1mb x 1bit ICs but the footprint is same as 18 pin DIP IC so need to have adapter board with 20 pin SOJ solder pads on one side, other side pads for 18 pins and soldered together and installed on the memory expansion card. I need to do that 36 pieces and height is a issue but that stacked height is not a problem.
There only one that is quantity is 18 pin 1MB x 1bit chips seller on the ebay but nothing found by other sellers offered that I need.
Even I could solder in 4mb 72 pin memory to all the points on the card but that looks ghetto.
This is for the 1mb kingston 32 bit memory expansion card for the compaq deskpro 386/25e and other that use same slot design.
This card has two spots, which can either 1mb which what I have, other unused solder points are for 4MB configuration.
Similar in idea what i described.
https://www.ebay.ca/itm/20-PCS-SOP16-SMT-to-D … vgAAOSw1~JZSE-V
Cheers,
Great Northern aka Canada.