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SB180WHO.MSG
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[ Captured from The ZCPR3 BBS/Z-NODE CENTRAL - Jun 25, 1986 ]
Msg #6612 posted 06/22/86 by Ken Davidson
To: Rick Charnes About: Micromint (12 lines)
Rick,
Are you familiar with Steve Ciarcia of BYTE magazine? Micromint
markets and supports the projects he writes about in his articles.
Take a look at the September/October 1985 issues of BYTE for a
description of the HD64180 and the SB180 which uses it. The chip
is basically a super Z-80 with an on-board MMU, DMAC, 2 serial ports,
internal timers, etc. We (yes, I work there) run the Circuit Cellar
BBS to support customers (203/871-1988). If you want more information
about the company, call the BBS or our toll-free number (800/635-3355)
and ask for a catalog. (That wasn't too commercial, was it Dave?)
Ken
Msg #6619 posted 06/23/86 by BRUCE MORGEN
To: Rick Charnes About: micromint (20 lines)
Rick, the Micromint SB-180 is the first of a new generation of
CP/M-compatible computers bundled with full-up Z-System (Z3 plus
ZRDOS). Instead of a Z80, it's built around Hitachi's HD64180,
an all-CMOS microprocessor that, for all intents and purposes, is
fully compatible with existing 8080/8085 and Z80/NSC800 programs.
It is fast - currently 6.144 mHz, with faster parts already in the
Trans-Pacific pipeline. Because of improved microcoding, the 64180
is faster than a Z80 running at the same clock speed - to the user,
a 6.144 mHz 64180 `looks' like about 7.5 to 8 mHz in Z80 terms.
The SB180 is a very good (NOT perfect - first shots seldom are)
microcomputer, discernably faster and more refined than a Morrow or
Kaypro (especially when using the VERY rapid 190k ramdisk). On the
down side, the SB180 has a rather large BIOS, all of which resides
in the "user bank" of memory. This makes the TPA with the stock
Z-System a bit skinny by Kaypro/Morrow standards: it has a 56k
system size - a similarly full-up (w/IOP) system on a floppy-based
Kaypro is 2k larger. This has given very few users problems, but
NAOG will be supplying a bigger (59.5 to 60k) system without IOP
and RCP to support the few in need. Hope this addresses your
question. NOW will you drop the absurd notion of running MESS-DOS?