[misc.wanted] TRS80, Model 100 Portable Questions

ccc_spt@waikato.ac.nz (Simon Travaglia) (03/05/91)

X-Date: 5 Mar 91 13:45:33 +1300
X-Organization: University of Waikato Computer Centre
Lines: 38


This is a repost of something I asked about a year ago, but I lost all the
replies in a mail purge.  I'd really appreciate it if you have any info that
you could mail to me.   

What I want to know is:

	1.  There's a RAM OPTION socket inside the MODEL 100; can anyone tell
		me what chip(s) fit in this, and what extra capacity it/they
		will give me.
	2.  There's a ROM OPTION socket as well; what would this be for, and
		was anything ever produced for it?
	3.  The BUS connector, what use is it?
	4.  What are the pin configurations for the phone plug and Cassete plug
		(and has anyone used them successfully outside the us)
	5.  TELCOM
		(a).  Can Telcom CALL using tones, not pulses?
		(b).  Can anyone list all that you can change with the STAT
			command, and the options for each, i.e. which letter
			changes baud rate, parity, etc etc
	6.  BASIC
		What other M100 specific commands (like DATE$,Day,time,IPL)
		are there.


This is a pretty tall order, but any help anyone can give me will be really
gratefully accepted.

				Thanks	- Simon

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cortez@ux1.cso.uiuc.edu (Jeff Cortez) (03/08/91)

>	1.  There's a RAM OPTION socket inside the MODEL 100; can anyone tell
>		me what chip(s) fit in this, and what extra capacity it/they
>		will give me.

There is a 8K ram chip which Radio Shack sells which fits this socket.
I don't remember the price, but it wasn't that much.  Some third-party
firms also sold memory expansion boards which plugged into this socket,
but I don't think any of them are still in business.  Anyone else know?

>	2.  There's a ROM OPTION socket as well; what would this be for, and
>		was anything ever produced for it?

This socket is used for many programs written for the Model 100.  I use
WriteRom myself.  There are many other programs available.  I will try
to repost later with the name's of some companies.

>	3.  The BUS connector, what use is it?

The BUS connector is used to hook up the external visual display expander.
(If anyone has one and wants to sell it I am interested :-))  Besides this,
the only thing else which I know of was the Chipmunk drive which I think is
not produced any longer.

>	4.  What are the pin configurations for the phone plug and Cassete plug
>		(and has anyone used them successfully outside the us)

Would have to look at the manual for the exact pin config., but I do know
that radio shack sells a modem cable and cassette cable which allow you to
use these ports.  Of course modem cable is made for use in the US so I don't
know how well it will work elsewhere. :-)  The cassette cable though should
work fine anywhere.

>	5.  TELCOM
>		(a).  Can Telcom CALL using tones, not pulses?

Telcom does not decide what to use, the switch on the left side labeled
touch tone/pulse does for the internal modem and external modems decide on
their own.

>		(b).  Can anyone list all that you can change with the STAT
>			command, and the options for each, i.e. which letter
>			changes baud rate, parity, etc etc

You can change RS232 communication speed and setup.  Also you can change
the internal modem setup.  Again, I need to get home to see what the manual
says so I will respond later with specifics.

>	6.  BASIC
>		What other M100 specific commands (like DATE$,Day,time,IPL)
>		are there.

Most normal BASIC commands are supported.  There are some specific commands
but I would refer you to the BASIC manual (which it seems you don't have :-( )
If you want, contact me and maybe we can make a deal for getting copies of
the manual sent to you.


>This is a pretty tall order, but any help anyone can give me will be really
>gratefully accepted.

>				Thanks	- Simon

Well no order is to tall.  :-).

By the way, for all you users who have been trying to contact me direct,
make note of my new email address.  I am still checking the old one, but
not very often.

Jeff Cortez
Maintainer of the Tandy100 Archives
tandy@uiuc.edu