Radio shack TRS-80 PC-1 and PC-2

From: Jim Tuck <technos_at_nerdland.org>
Date: Sun Oct 14 02:10:02 2001

On Saturday, October 13, 2001 3:06 PM, Tony Duell
[SMTP:ard_at_p850ug1.demon.co.uk] wrote:
> I have the Sharp PC1500 (very similar to the TRS-80 PC2) technical
> manual.... (well, I would, right :-)).
>
> It doesn't say that much about the cassette format, but it does say
> something. If there are any details you're not sure about, feel free to
> ask me in case I can find them...
>
> >
> > I *WILL* IRC from one of these, goddamnit..
>

The PC-1500 is the same calc. The only differences are in the badge and the
keyboard. You can plug Sharp modules, printer, etc into the RS (and vice versa)

I have the RS equivalent technical manual. It gives specifications on the
frequency
encoding and rate. I also managed to scrounge a break down of the raw hex to
Basic operand (two digit hex code to each operator/char, a small amount of
padding)

> Err, add a CE158 RS232 interface (to the PC2/Sharp PC1500)? It contains a
> 1-line terminal emulator in the ROM :-) Yes this device does exist...
>
> Radio Shack sold a similar unit for a time. The ROM and RS232 interface
> was indentical, but the Centronics port (present on the CE158) was not
> fitted. The commands to talk to it were still in the ROM, but undocumented...
>
> I have one of each type. With the latter one, I could have added the
> Centronics port (it's only a couple of buffer chips, and I have all the
> schematics), but instead I packed an ADC chip in there, using the 'spare'
> port lines on the I/O chip to talk to it (I/O lines that would have been
> used for the centronics port, etc). Made a nice pocket data logger :-)
>
> -tony

The problem is finding one. I've had *no* luck, and even if I could find one,
it
wouldn't help me with the PC-1 (Sharp PC-1211) anyway.

Jim
Received on Sun Oct 14 2001 - 02:10:02 BST