Amiga 1000 upgrades

Modifies an Amiga 1000 to boot Kickstart from four EPROMs while retaining access to its 256 KB daughterboard RAM.

For this system (exact model): The project documents installation on an Amiga 1000 Revision 6 motherboard. Separate Revision A instructions are included but explicitly marked untested because the maker did not have that motherboard revision.

This is an advanced board-level modification, not a plug-in board. It requires a GAL16V8A, four 27C512 EPROMs, a legally obtained Kickstart image, device programming, desoldering, jumper installation, and PCB trace cuts.

Recreates the Comspec SA-1000 sidecar to add a SCSI bus and real-time clock to an Amiga 1000.

For this system (exact model): The board is specifically shaped for the Amiga 1000 side expansion port. The documented autoboot setup expects a powered external SCSI drive at ID 0 and Kickstart 1.3. The maker reports difficulty loading Kickstart from SCSI even with an original board and instead uses a separate Kickstart Eliminator.

This is a self-assembly project with a schematic, bill of materials, and fabrication package. It requires programmed GALs and ROMs plus careful alignment of the 86-pin edge connector. The alternate RTC-72421 clock chip is suggested but untested.