EPROM Emulator max size?

MicroCoreLabs / Projects

Ted Fried's MicroCore Labs Projects which include microsequencer-based FPGA cores and emulators for the 8088, 8086, 8051, 6502, 68000, Z80, Risc-V, and also Typewriter and EPROM Emulator projects. MCL51, MCL64, MCL65, MCL65+, MCL68, MCL86, MCL86+, MCL86jr, MCLR5, MCLZ8, MCL6809, XTMax

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EPROM Emulator max size? #25

Open muramasatheninja opened 6 months ago

muramasatheninja commented 6 months ago

Hi, I just stumbled upon your eprom emulator project. It looks like at the moment the max size is 64KB (27C512). I have a project that needs 512KB (27C040). I wanted to see if it would be possible to scale this design up for that and if you had any recommendations to accomplish this?

GrantMTG commented 6 months ago

I don't know where you are going to get the pins from. Maybe a larger form factor Teensy, if there is such a thing? Check out the schematic:

https://github.com/MicroCoreLabs/Projects/blob/master/EPROM_Emulator/ROM_Emulator_PCB_CE_n/ROM_Emulator.pdf

MicroCoreLabs commented 6 months ago

If you adapt the design to the Teensy 4.1 you should have enough pins. Will be a larger PCB however...