EDSAC on your desk.

From: Allison J Parent <allisonp_at_world.std.com>
Date: Tue Sep 22 20:29:28 1998

< We just to joke that Z80EMU on a Pentium was faster than any Z80 process
< you could actually buy, I wonder if it wouldn't be feasible these days t
< create a 38 pin I/O port and build an "ICE" in software...
< --Chuck

thats a tall claim as the z80 is available up to 20mhz and z180s to 33mhz.
Then you can also use he Z380 is z80 native mode (it uses fewer clocks
per instruction than any other z80) at 20mhz (faster are supposed to
exist.).

I am in the process of bringing up a Z280 at 12.5mhz (with 16bit zbus)
and I expect that with it's instruction cache and fast ram there will
be a new level of CPM performance comming.

since I have a z80 system that runs at 8mhz (no waits!) and MYZ80 on a
486dx2/66 and the 486 is faster on emulated disk IO (inherent caching) but
about the about the same as the 8mhz system otherwise. The disk
differences are due to the type of interface SCSI-1 vs SCSI-II and size of
buffers.

Emulators have their place. One is allowing cross platform code
development and testing and the other is allowing access to archetectures
that are scarce or unusual.

Allison
Received on Tue Sep 22 1998 - 20:29:28 BST