Compact Flash interface

A project log for STEbus Z8000

Interfacing an existing Z8000 design to the STEbus

KeithKeith 11/09/2021 at 23:300 Comments

The original design uses an 8-bit data path. So it either works in the relatively slow 'PIO' mode, or wastes half the card data.

A CF card can also present itself as a memory-mapped device, showing 1K of 16-bit words at a time.

I think the CPU may be able to boot directly from the CF card in memory mode, bypassing the need for the ATmega device.