On 4/22/24 14:09, Bill Gunshannon via cctalk wrote:
Would it not be possible to use something like a Blue Pill to make
a small board (small enough to actually fit in the CPU socket) that
emulated these old CPUs? Definitely enough horse power just wondered
if there was enough room for the
On 4/22/24 12:18, Chuck Guzis via cctalk wrote:
I don't know if this applies to the Z80, but on the 8080, 16-bit
increment/decrement is handled by a separate increment block (also used
to advance the P-counter and stack operations). Probably one of the
reasons that INX/DCX doesn't set any
On 4/21/24 20:06, Peter Coghlan via cctalk wrote:
Why is that? Did the Z80 take more cycles to implement it's more complex
instructions? Is this an early example of RISC vs CISC?
Z80 is blessed with a 4-bit ALU, verified by reverse engineering dieshots (
On 12/5/19 12:39 PM, Eric Smith via cctalk wrote:
Last year I read most of the PALs and HALs of a TRS-80 Model 16B main
board (same as Model 12 main board). I was surprised that none of the
PALs were protected, and even more surprised that some (but not all)
of the HALs could be read as PALs.
On 11/29/19 7:01 PM, Bill Gunshannon via cctalk wrote:
Let's try again with the right name in the Subject line! It's not
really classic (although it does try to pretend to be but does anyone
here do anything with the P112 SBC? I am trying to get 8" disks
running on it but I am seeing some
