Molex 78802 compatible carrier to hold a PCB with edge contacts in a Molex 78805 socket.
28 pin PCB version
The idea is to take the empty PCB design from the source below and put whatever you want on it in place of the 27Cxxx DIP EPROM the socket probably expects. For instance, the simplest example would be a 28Cxxx EEPROM, or 29Fxxx flash, perhaps a larger memory flash part with dip switches right on the pcb to select between several different rom images, or even a microcontroller to do something more active than merely emulating an EPROM.
For examples of this, see
REX Classic,
REX# & REXCPM,
Teeprom & Meeprom.
OpenSCAD source which generates all 3 sizes, 24, 28 and 32 pin, in both DIP and PCB versions, along with KiCAD source for PCB templates to fit the PCB versions.
https://github.com/bkw777/Molex78802_Module