RCVAXB::HAAR@gmr.COM (RLH) (03/02/88)
I want to upgrade my S-100 bus CP/M system with a CPU board using
one of the new Z80 replacement chips. What board-level products
are available? Can anyone give recommendations and/or comparisons?
Since I want to maintain Z80 and CP/M compatibility, I am interested
in the Hitachi HD64180 and the Zilog Z180 & Z280 chips to get the
larger address space. I also want to be able to move up to ZCPR
when the versions supporting these chips become available.
My configuration is pretty much normal for hobbyist S-100 CP/M systems:
Tarbell Z-80 CPU card with banked memory and serial I/O
Tarbell floppy disk controller with 8 " SSDD drives
192K static RAM
SDS VDB8024 video display & keyboard interface board
misc. serial/parallel I/O and clock/calendar boards
CP/M Plus (v 3.0) in banked mode
I would like to replace the CPU board but keep everything else in place
to start with. I would be willing to add an external CRT terminal
and 5 1/4 floppies if that makes sense. Also, I have done enough
assembly language hacking on the BIOS that some of that is no
problem.
Since I suspect that others on this list have similar interests, I
suggest that responses be posted here rather than sent to me
directly.
Bob Haar
E-mail: HAAR@GMR.COM (on CSNET or ARPANET)