11 Jun
1997
11 Jun
'97
3:16 a.m.
HI,
In my non-op list of equipment I have three cocos apparently operational.
They are of two different styles.
The smaller is the TRS80 color computer with real keys on the keyboard.
I have two of these one the case was wiped out, board is ok.
The larger is TDP-100 personal color computer with chiclet keys.
Lacking docs I presume these have rom Basic. What expansion is possible
(there is a port) and how hard. Do they run any real OSs or some TRShack?
There is a ROM basic, which is essentially Microsoft. This may either be
'Color Basic' (lacks high-res graphics commands, etc) or 'Extended Color
Basic'.
The expansion port is a 40 way edge connector, and is the 6809 system bus
with a few extras. I can find a pinout if you need it.
I mentioned the OS's a few days back. If you have a disk drive, you will
have disk basic in ROM. You can run 'color TRS-DOS' from disk (pretty
simple OS) or OS-9 if you have 64K. OS-9, is (IMHO) a real OS.
What's the odds of finding DOCS especially schematics?
Very high. Tandy were hacker-friendly, and you could get service manuals
for all their computer stuff (I have the CoCo 3 service manual). There's
also a CoCo TechRef that includes the CoCo1 schematics with more
explanations than the service manual gives.
Allison
--
-tony
ard12(a)eng.cam.ac.uk
The gates in my computer are AND,OR and NOT, not Bill