25 Feb
2010
25 Feb
'10
2:39 p.m.
On 2/25/10, Fred Cisin <cisin at xenosoft.com> wrote:
OK.
It was a sandwich under the FDC, not to be confused with the Percom Data
Separator sandwich, nor the Percom Doubler sandwich.
I think my Model I expansion chassis has some form of density doubler
sandwich (and a serial port mod, too).
That would be why I never noticed the difference - for that "class", I
stuck to BASIC (I was doing assembly on my C-64 at home, but not at
school).
Thanks for the informative responses. I'll probably just stick with
some flavor of TRSDOS on the Tandy hardware and jump over to a Kaypro
or S-100 box for CP/M.
-ethan
On Thu, 25 Feb 2010, Ethan Dicks wrote:
So if I understand this right, you'd have to recompile any application
source specifically _for_ this environment?
Is that available anywhere now?
I gave away my last handful of copies of it at VCF years ago. It was CP/M
1.4?
I don't think that it was any good for running any commercial CP/M
software. Is it a
"difficult" mod? I.e., would it be worth rolling a modern one?
A sandwich board under the Z80, with a few chips. Could probably be done
simpler if you're willing to cut traces on the Model 1 board.
But, I do NOT know the details of them. There were also hardware mods for the Expansion
Interface to run 8"
drives.
I'd guess those aren't too difficult to implement these days.
Interesting to
know now. When I was in High School, we had one Model
III and one Model 4...
When running TRSDOS, they were virtually indistinguishable, unless you got
down deep enough into it to go after the additional RAM.