1 May
1997
1 May
'97
11:23 p.m.
Well, here's my 2 bits on the ??'s in the Tandy Line...
4D Micro Z80A 64K TRSDOS
6.X MICRO 85
There were really MANY DOS's for the 1/3/4 line, TRSDOS is
what shipped with it. Few people use TRSDOS on the 1/3 where
NEWDOS/80, LDOS were more popular. TRSDOS 6.X was really a
licensed version of LDOS, IIRC.
100 80C85 32K Proprietary ROM
Forgot about the 100, the predecessor of the 102. The 100 was
thicker, by about 1/4", and had a few ROM bugs that the 102
fixed. Also, the 102 had a System Bus OUT port in a convenient
place (where the printer & other I/O ports were) while the 100's
system bus was under a case on the bottom of the machine.
102 80C85 32K
Proprietary ROM PORT. 86
There were some rudimentary OS for the 100/102 with the
serial-port, tough-as-nails, 3.5" floppy drive. Without
the drive, you used a ROM-based menu system.
200 80C85 24K
Proprietary ROM PORT. 85
A souped-up 100/102, in a clamshell. Same rules apply.
6000 68000 512K ??
MICRO 84
I'm fairly certain this machine had it's own flavor of
TRSDOS but I'm not big on the 2/12/6K line.
Color Computer 2 6809E 64K ??
MICRO 84
Color Computer 3 6809E 128K ?? MICRO 86
Not much I can do here. There was a Coco 1 which topped out
at 32K with the same CPU (I think). There was also a micro-
version of the COCO, the MC-10, which was perversely half-
compatible with the COCO line. Had a 6809C CPU (I think),
upgradable from 4K (stock) to 16K with an add-on plastic
block that had a tendency to fall out at inopportune times.
PC-4 Z80 ?? ??
PORT. 83
PC-5 Z80 ?? ?? PORT. 85
PC-6 Z80 8K ?? PORT. 86
There are (as you'd no doubt guessed) a Portable Computer,
a PC-2, and a PC-3. I don't think they carried Z80s, but
I may be wrong. The PC-3 had a 24-character LCD with a
max of 4K of RAM.
Color Computer 6809 16K ??
MICRO 84
Micro Color Computer 6809 64K ?? MICRO 84
Oops... you had these. I think the Coco could go to 32K &
the MC10 could only go to 16K. I'm fairly certain that the
CPU on the MC10 was not a true-blue 6809.
TRS-80 Model 4P Z80 64K ??
MICRO 84
TRS-80 Model 12 Z80 80K ?? MICRO 83
TRS-80 Model 16B 68000 w/Z80 256K ?? MICRO 83
TRS-80 Model 100 Z80 24K ??
MICRO 83
Another oops. I see you have the 100.
But you did miss the grand-daddy of them all, the Model I.
Z80A microprocessor, 48K Max RAM, Shipped with TRSDOS 2.3
in its heyday, but most people used NEWDOS/80, LDOS, or
other 3rd party packages.
TRS-80 Model 1000 8088 128K ??
MICRO 85
This was actually the first machine produced with the name
TANDY instead of TRS-80. The Model 2000 was the last of
the TRS-80 line.
TRS-80 Model II Z80 64K ??
MICRO 78
TRS-80 Model III Z80 64K ?? MICRO 80
TRS-80 PC-1 Z80 32K ?? MICRO 80
TRS-80 PC-2 Z80 32K ?? MICRO 82
Hope this helps!
*****************************************************
Gary S. Katz
626C OEH
University of Pittsburgh
Pittsburgh, PA 15213
(412) 624-9347 voice
(412) 624-5407 fax
*****************************************************