21 Jan
2001
21 Jan
'01
6:38 a.m.
Ok, I have not had any responses on my request to buy a TRS-80 Expansion
Interface serial board. I am really getting desperate now.
I don't need to keep the board so if anyone is willing to lend or even
RENT me one then that would be fine.
$$$
Please reply to <sellam(a)vintage.org>rg>.
Sellam Ismail Vintage Computer Festival
------------------------------------------------------------------------------
International Man of Intrigue and Danger http://www.vintage.org
21 Jan
21 Jan
8:34 a.m.
Ok, I have not had any responses on my request to buy a
TRS-80 Expansion
Interface serial board. I am really getting desperate now.
I don't need to keep the board so if anyone is willing to lend or even
RENT me one then that would be fine.
I'd lend you mine, but it gets around the flakey connection
issue by soldering about a 6 inch piece of ribbon cable to the bottom
of serial card and the other end to the IE's connector for the card,
then placing a piece of non-conductive material between the two so
that the cable can be doubled over and the serial card held in place
using two screws. Unfortunately, this makes the serial board
unremovable. It has had the connectors on the outside updated with
gold contacts as well. Now if only I had a working double density
board for it as mine either died or has gone out of spec very badly.
Jeff
--
Collector of Classic Microcomputers and Video Game Systems:
Home of the TRS-80 Model 2000 FAQ File
http://www.geocities.com/siliconvalley/lakes/6757
10:41 a.m.
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10:38 a.m.
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7:24 p.m.
On Sun, 21 Jan 2001, Tony Duell wrote:
You could always do what I have to do when I can't
find a necessary piece
of ancient hardware.... Get out a soldering iron and _build_ one... :-)
I wish I had the time, Tony. And I wish I had your skills ;)
The TRS-80 serial board is not complex, and the
schematic exists. It's in
the manual, and it was printed in one of Bill Barden's articles in Byte
in the mid 1980s. The necessary chips are almost all available -- the
only thing that would be hard to get now is the COM8116 baud rate
generator, and you can kludge over that particularly if you only need one
baud rate.
I could probably track down the COM8116 at a local surplus store, but
again it's the time factor. Also, I don't have the manual (or at least
don't know where I might have a copy since everything I have is buried)
and haven't been able to find one online.
However, I have come up with solution. The software I'm trying to run
requires two TRS-80's to be connected together via a modem connection or a
null modem serial connection. I have a couple each Modem I's, Modem II's,
and other variations (Ib, etc). It seems the Expansion Interface doesn't
need the serial port option to connect to a modem, correct? So I'm just
going to use two Modem II's and a telco line simulator (or two PBX
extensions) for the telco loop.
If this works then I won't need the serial port boards.
Sellam Ismail Vintage Computer Festival
------------------------------------------------------------------------------
International Man of Intrigue and Danger http://www.vintage.org
22 Jan
22 Jan
7:42 a.m.
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7:35 a.m.
On Mon, 22 Jan 2001, Tony Duell wrote:
The connector at the centre-front of the EI is
electrically
unconnected (apart from grounds) if the serial board is not installed,
so anything that connects there will need the serial board. Period.
Ok, then I'll go back to my pathetic and desperate plea for a couple
serial boards for the TRS-80 EI.
Will trade for money, food, sex, whatever.
;)
Sellam Ismail Vintage Computer Festival
------------------------------------------------------------------------------
International Man of Intrigue and Danger http://www.vintage.org
2:09 a.m.
The connector
at the centre-front of the EI is electrically
unconnected (apart from grounds) if the serial board is not installed,
so anything that connects there will need the serial board. Period.
Ok, then I'll go back to my pathetic and desperate plea for a couple
serial boards for the TRS-80 EI.
Will trade for money, food, sex, whatever.
10:01 a.m.
On Mon, 22 Jan 2001, Gene Buckle wrote:
Wasn't there a TRS-80 modem that would connect to
the EI connector on
the back of the keyboard unit?
If so, it probably requires adjunct software as Tony described and will
probably not work with the software I'm trying to get running.
Sellam Ismail Vintage Computer Festival
------------------------------------------------------------------------------
International Man of Intrigue and Danger http://www.vintage.org
4:30 a.m.
If so, it probably requires adjunct software as Tony described and will
probably not work with the software I'm trying to get running.
One last thought... do any of the TRS-80 Model I emulators have serial
port support? Would this not solve your problem if they did, or is there
some real-world problem you're trying to solve?
g.
11:50 a.m.
On Mon, 22 Jan 2001, Gene Buckle wrote:
One last thought... do any of the TRS-80 Model I
emulators have serial
port support? Would this not solve your problem if they did, or is there
some real-world problem you're trying to solve?
It needs to run on the original TRS-80.
Sellam Ismail Vintage Computer Festival
------------------------------------------------------------------------------
International Man of Intrigue and Danger http://www.vintage.org
1:28 p.m.
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1:52 p.m.
One last
thought... do any of the TRS-80 Model I emulators have serial
port support? Would this not solve your problem if they did, or is there
some real-world problem you're trying to solve?
It needs to run on the original TRS-80.
8:12 p.m.
On Mon, 22 Jan 2001, Gene Buckle wrote:
Ok, why? :)
g.
One last thought... do any of the TRS-80 Model I
emulators have serial
port support? Would this not solve your problem if they did, or is there
some real-world problem you're trying to solve?
It needs to run on the original TRS-80.
23 Jan
23 Jan
6:13 a.m.
On Mon, 22 Jan 2001, Gene Buckle wrote:
Ok, why? :)
For demo purposes ;)
Sellam Ismail Vintage Computer Festival
------------------------------------------------------------------------------
International Man of Intrigue and Danger http://www.vintage.org
One last thought... do any of the TRS-80 Model I
emulators have serial
port support? Would this not solve your problem if they did, or is there
some real-world problem you're trying to solve?
It needs to run on the original TRS-80.
22 Jan
22 Jan
12:01 p.m.
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12:33 p.m.
On Mon, 22 Jan 2001, Gene Buckle wrote:
Wasn't there a TRS-80 modem that would connect to
the EI connector on the
back of the keyboard unit?
AND, for printing use, there were adapters for connecting serial
("RS232") printers to cassette port ("TRS232"), and to EI port (GPA
(software compatible with TRS232)).
--
Fred Cisin cisin(a)xenosoft.com
XenoSoft http://www.xenosoft.com
PO Box 1236 (510) 558-9366
Berkeley, CA 94701-1236
12:49 p.m.
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8562
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17 comments
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ard＠p850ug1.demon.co.uk -
cisin＠xenosoft.com -
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