On 1/6/2018 4:01 PM, emanuel stiebler via cctalk wrote:
On 2017-12-27 21:35, Randy Dawson via cctalk wrote:
What have you done, with microprogramming this part? In your
architecture, have you changed the microcode, create an instruction
to enhance your machine?
I would be interested in any hardware projects, stories (or even in
the FPGA, I hear its a popular thing to copy);
I hope you saw this one. Fresh on opencores:
https://opencores.org/project,am9080_cpu_based_on_microcoded_am29xx_bit-slices
cheers
I don't expect many people will copy that. A FPGA 8080 runs darn fast as
is. Ben.
PS: I plan to have some sort of 20 or 24 cpu bit 2901 running in a DE1
FPGA this spring. 3 - 7 bit bytes (21/20 bit wide memory for the 20 bit
CPU) or 3 - 8 bit bytes with a 24 bit cpu. Might need to order more
Front panel switches how ever.
