The MegaROM is developped by Ghislain Fournier (hardware) and François Mouret (software).
All the information can be found here : [http://collection.thomson.free.fr/creations/megarom/page.php MegaROM on Collection Thomson].

Unfortunately, the project was aborted near completion and never was completed.

The version you'll find here has some improvements :
 * New PCB routing with less vias. (done)
 * New version (MegaFLASH) using rewritable flash memory instead of read-only ROM. So you can load custom programs into it. This is also very handy as a ROM development tool. (WIP)

= Hardware for the MegaFLASH =
The logic is rather similar to the original MegaROM, but there are some things to take care of:
 * The Flash pinout is different from the ROM one (even if the pins functions are mostly the same).
 * The flash must receive write operations as well as read, in all banks.
 * The bank-switch logic may conflict with writing the flash.