TRS-80 Fragmentation

Bill Gunshannon bill.gunshannon at
Thu Apr 26 16:58:58 CDT 2018

On 04/26/2018 05:51 PM, Mark J. Blair via cctalk wrote:
>> On Apr 26, 2018, at 14:25, Geoffrey Oltmans via cctalk <cctalk at> wrote:
>> TRS-80 Model II and 16, 68k based "business" machines
> The Models II and 12 were Z80 based machines. The models 16 and 6000 were the same Z80 based machines with 68k subsystems added via additional cards to allow them to run Xenix.

I believe the Z-80 was subordinate to the M68K.   The Model 16 was developed
independently of the Model II.  While Tandy had a version of Xenix to 
sell for it
it shipped with TRSDOS-16.  It also ran CP/M-68K rather nicely.  It was 
a good
machine destined to die when Tandy decided not to be a computer company.


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