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- Path: sparky!uunet!cis.ohio-state.edu!magnus.acs.ohio-state.edu!usenet.ins.cwru.edu!slc6!trier
- From: trier@slc6.ins.cwru.edu (Stephen C. Trier)
- Newsgroups: comp.sys.tandy
- Subject: Re: COCO vs Z80
- Date: 10 Sep 1992 18:24:03 GMT
- Organization: Case Western Reserve University, Cleveland, OH (USA)
- Lines: 31
- Message-ID: <18o3s3INNhm5@usenet.INS.CWRU.Edu>
- References: <qV1uqB2w163w@coyote.datalog.com>
- NNTP-Posting-Host: slc6.ins.cwru.edu
-
- In article <qV1uqB2w163w@coyote.datalog.com> leonard@coyote.datalog.com (Leonard Lorden) writes:
- >I'm referring to the ORIGINAL COCO, not the current one, which I'm pretty
- >sure started off with the Z80...
-
- The Color Computer NEVER used a Z80. No model of "Color Computer" ever had
- a Z80. They ALL had 6809 CPUs:
-
- Color Computer (original) 6809E
- 64K Color Computer 6809E
- Color Computer 2 6809E
- Color Computer 3 68B09E
-
- The Micro Color Computer (MC-10), an ill-fated competitor to the Timex-
- Sinclair, used a 6803. (Actually, I *think* it was the 6803E variant --
- there difference is how the CPU clock signals are generated.)
-
- Please don't doubt this -- I've been under the covers of everything from
- a 4K D-board CoCo 1 to a 512K CoCo 3, and all had 6809 CPUs.
-
- By the way, there was once a third-party add-on box for the CoCo that
- provided an 80 column screen and a Z80 for CP/M. It never really caught
- on; the 64K-capable CoCos running Flex or OS9 killed it.
-
- However, all of the internal CPUs in all models of CoCo were from the
- 6809 family.
-
- --
- "Beware of programmers who Stephen Trier
- carry screwdrivers." Network Services Engineering, IRIS/INS/Telecom
- Leonard Brandwein Case Western Reserve University
- trier@ins.cwru.edu
-