16 Nov
2001
16 Nov
'01
2:54 a.m.
Hi again. :)
I just thought of another question. I have in my possession four TRS-80
model IVs. Two portables, (one working, one not), and two desktops (one
working, one not).
The desktop will run in Model III emulation mode. The portable will turn on
and ask for a disk.
Anybody know where I can find some operating system(s) for them?
I'm also thinking about taking the ram from the non-working machines, and
using it to max out the memory in the working ones. Good idea, bad idea?
Regards,
Chris
Christopher Smith, Perl Developer
Amdocs - Champaign, IL
/usr/bin/perl -e '
print((~"\x95\xc4\xe3"^"Just Another Perl
Hacker.")."\x08!\n");
'
16 Nov
16 Nov
4:20 a.m.
Maxing out the RAM is probably not a bad idea, but I'd suggest you attempt to
figure out why the non-working ones don't work, and, if that's the only problem
you can't solve, I'll happily send you the necessary DRAMs for the cost of
postage.
These are not complicated machines, so, once you've found the software and once
you've located the defective components, they're probably pretty easy to fix,
aside from the somewhat touchy business of desoldering parts from the rather
low-quality PCB's.
Dick
----- Original Message -----
From: "Christopher Smith" <csmith(a)amdocs.com>
To: "Classiccmp (E-mail)" <classiccmp(a)classiccmp.org>
Sent: Friday, November 16, 2001 9:54 AM
Subject: TRS-80 Model IV
Hi again. :)
I just thought of another question. I have in my possession four TRS-80
model IVs. Two portables, (one working, one not), and two desktops (one
working, one not).
The desktop will run in Model III emulation mode. The portable will turn on
and ask for a disk.
Anybody know where I can find some operating system(s) for them?
I'm also thinking about taking the ram from the non-working machines, and
using it to max out the memory in the working ones. Good idea, bad idea?
Regards,
Chris
Christopher Smith, Perl Developer
Amdocs - Champaign, IL
/usr/bin/perl -e '
print((~"\x95\xc4\xe3"^"Just Another Perl
Hacker.")."\x08!\n");
'
5:22 a.m.
I thought that they required a PAL in addition to extra ram chips, in
order to install a memory upgrade.
-Lawrence LeMay
Maxing out the RAM is probably not a bad idea, but
I'd suggest you attempt to
figure out why the non-working ones don't work, and, if that's the only problem
you can't solve, I'll happily send you the necessary DRAMs for the cost of
postage.
These are not complicated machines, so, once you've found the software and once
you've located the defective components, they're probably pretty easy to fix,
aside from the somewhat touchy business of desoldering parts from the rather
low-quality PCB's.
Dick
----- Original Message -----
From: "Christopher Smith" <csmith(a)amdocs.com>
To: "Classiccmp (E-mail)" <classiccmp(a)classiccmp.org>
Sent: Friday, November 16, 2001 9:54 AM
Subject: TRS-80 Model IV
Hi again. :)
I just thought of another question. I have in my possession four TRS-80
model IVs. Two portables, (one working, one not), and two desktops (one
working, one not).
The desktop will run in Model III emulation mode. The portable will turn on
and ask for a disk.
Anybody know where I can find some operating system(s) for them?
I'm also thinking about taking the ram from the non-working machines, and
using it to max out the memory in the working ones. Good idea, bad idea?
Regards,
Chris
Christopher Smith, Perl Developer
Amdocs - Champaign, IL
/usr/bin/perl -e '
print((~"\x95\xc4\xe3"^"Just Another Perl
Hacker.")."\x08!\n");
'
6:55 a.m.
I thought that they required a PAL in addition to
extra ram chips, in
order to install a memory upgrade.
That is only on the non-gate array systems. The gate array systems
just require the RAM and some jumper changes.
--
Eric Dittman
dittman(a)dittman.net
Check out the DEC Enthusiasts Club at http://www.dittman.net/
7:01 a.m.
Maxing out the RAM is probably not a bad idea, but
I'd suggest you attempt to
figure out why the non-working ones don't work, and, if that's the only problem
you can't solve, I'll happily send you the necessary DRAMs for the cost of
postage.
These are not complicated machines, so, once you've found the software and once
you've located the defective components, they're probably pretty easy to fix,
aside from the somewhat touchy business of desoldering parts from the rather
low-quality PCB's.
I had a gate array 4P with a dead video. Everything looked good going in to
the video gate array, but nothing was coming out. I tried the video gate array
from my 4 and it worked, so I ordered a new video gate
array from Radio Shack.
That was about 10 years ago. I don't know if they still
have any of the custom
chips in stock any more. If not, then you'll have to look for another dead
system for replacements (if one of the gate arrays is bad; they are socketed).
The standard chips should be easy to find.
--
Eric Dittman
dittman(a)dittman.net
Check out the DEC Enthusiasts Club at http://www.dittman.net/
4:57 a.m.
And because we're on the subject,
I'm still looking for this:
"trs-80 model IV technical reference manual"
some people sent me links where I could find it, but this manual was
never there.
Some of them are just 404, and sometimes there is the wrong manual
there.
So, PLEASE anybody knows where I can find a copy of it ?
cheers,
emanuel
6:57 a.m.
And because we're on the subject,
I'm still looking for this:
"trs-80 model IV technical reference manual"
some people sent me links where I could find it, but this manual was
never there.
Some of them are just 404, and sometimes there is the wrong manual
there.
So, PLEASE anybody knows where I can find a copy of it ?
There were two different version. One was in a brown binder and
covered only the non-gate array systems, and was 8.5"x11". The
other was in a smaller format (I forget the size) and was in a
beige binder. I have a copy of each, but I've never seen online
copies.
--
Eric Dittman
dittman(a)dittman.net
Check out the DEC Enthusiasts Club at http://www.dittman.net/
12:04 p.m.
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participants (6)
-
ard＠p850ug1.demon.co.uk -
csmith＠amdocs.com -
dittman＠dittman.net -
edick＠idcomm.com -
emu＠ecubics.com -
lemay＠cs.umn.edu