20-04-2025, 01:24 PM
(18-04-2025, 12:38 PM)someone Wrote: Any chance of bumping it up to 50MHz with an eZ80?
Actually no. I have investigated the eZ80 for Microbee suitability and the big stumbling block is that
the internal peripherals are mapped in permanently at I/O Ports 00h->FFh. There is no way to disable them
or relocate them, making is impossible to use with a standard Microbee Port Map.
The Z8S180 on the other hand has internal peripherals / control registers that can be mapped out of the way.
So, the top speed for a Microbee (with actual silicon Z80) is the Z8S180's 33Mhz.
Happy Easter to all. :-)