10 Jan
2012
10 Jan
'12
1:14 a.m.
I just tripped over an unusual cable:
It has a trapezoidal thin black box labeled "TRS0-80", but no part number,
one side has a few inches of cable with a 40 pin card edge connector,
the other side has a few feet of cable with a 50 pin edge connector.
40 pin was probably model 1 expansion bus (I hafn'y messed with model
2/12/16). But what did Radio Shack use on model 1 with 50 pin?
--
Grumpy Ol' Fred cisin at xenosoft.com
10 Jan
10 Jan
1:57 a.m.
Hmm..could it have been a special cable used to connect the 50 pin System
80 (aka PMC-80 in the US) expansion card to the 40 pin TRS-80 Model 1
Expansion interface. I have one of these cables.
However, are you saying it came in a Radio Shack box? If this is the case,
maybe not.
Terry (Tez)
On Tue, Jan 10, 2012 at 2:14 PM, Fred Cisin <cisin at xenosoft.com> wrote:
I just tripped over an unusual cable:
It has a trapezoidal thin black box labeled "TRS0-80", but no part number,
one side has a few inches of cable with a 40 pin card edge connector,
the other side has a few feet of cable with a 50 pin edge connector.
40 pin was probably model 1 expansion bus (I hafn'y messed with model
2/12/16). But what did Radio Shack use on model 1 with 50 pin?
--
Grumpy Ol' Fred cisin at xenosoft.com
1:58 a.m.
PMC-80 Expansion card edge on the computer I mean of course.
Terry
On Tue, Jan 10, 2012 at 2:57 PM, Terry Stewart <terry at webweavers.co.nz>wrote:
Hmm..could it have been a special cable used to
connect the 50 pin System
80 (aka PMC-80 in the US) expansion card to the 40 pin TRS-80 Model 1
Expansion interface. I have one of these cables.
However, are you saying it came in a Radio Shack box? If this is the
case, maybe not.
Terry (Tez)
On Tue, Jan 10, 2012 at 2:14 PM, Fred Cisin <cisin at xenosoft.com> wrote:
I just tripped over an unusual cable:
It has a trapezoidal thin black box labeled "TRS0-80", but no part number,
one side has a few inches of cable with a 40 pin card edge connector,
the other side has a few feet of cable with a 50 pin edge connector.
40 pin was probably model 1 expansion bus (I hafn'y messed with model
2/12/16). But what did Radio Shack use on model 1 with 50 pin?
--
Grumpy Ol' Fred cisin at xenosoft.com
2:32 a.m.
On Tue, 10 Jan 2012, Terry Stewart wrote:
Hmm..could it have been a special cable used to
connect the 50 pin System
80 (aka PMC-80 in the US) expansion card to the 40 pin TRS-80 Model 1
Expansion interface. I have one of these cables.
However, are you saying it came in a Radio Shack box? If this is the case,
maybe not.
Good guess, but, . . .
I don't remember ever having had an extra PMC cable, but I had LNW, Lobo,
HuH expension units.
But, the embossed "TRS-80" on it would seem to make those not a
possibility, due to Radio Shacks heavy handed trademark enforcement.
No box. But, next to a buffered EI cable.
Thanks,
11 Jan
11 Jan
5:15 a.m.
On 1/9/12 6:32 PM, "Fred Cisin" <cisin at xenosoft.com> wrote:
On Tue, 10 Jan 2012, Terry Stewart wrote:
Possibly a mod3/4 to trs-80 hard disk unit cable?
Hmm..could it have been a special cable used to
connect the 50 pin System
80 (aka PMC-80 in the US) expansion card to the 40 pin TRS-80 Model 1
Expansion interface. I have one of these cables.
However, are you saying it came in a Radio Shack box? If this is the case,
maybe not.
Good guess, but, . . .
I don't remember ever having had an extra PMC cable, but I had LNW, Lobo,
HuH expension units.
But, the embossed "TRS-80" on it would seem to make those not a
possibility, due to Radio Shacks heavy handed trademark enforcement.
No box. But, next to a buffered EI cable.
Thanks,
10 Jan
10 Jan
2:13 a.m.
On Mon, 9 Jan 2012, Fred Cisin wrote:
I just tripped over an unusual cable:
It has a trapezoidal thin black box labeled "TRS0-80", but no part number,
one side has a few inches of cable with a 40 pin card edge connector,
the other side has a few feet of cable with a 50 pin edge connector.
40 pin was probably model 1 expansion bus (I hafn'y messed with model
2/12/16). But what did Radio Shack use on model 1 with 50 pin?
8" floppy interface?
--
2:40 a.m.
On Mon, 9 Jan 2012, Steven Hirsch wrote:
8" floppy interface?
Hmmm. I thought about 8" or SCSI, but the trapezoidal boc is too thin to
be an interface - presumably just a circuit board for spreading the 40 pin
cable out to 50 pin.
All of the 8" interfaces that I had for TRS-80 (except for separate EIs)
were piggy-back boards for the FDC chp socket in the EI.
Hmmm. did either the RADIO SHACK brand voice input, voice output
(rebranded Votrax), or X10 interface use 50 pin? I don't think so.
I'd offer to give it away, but that is a surefire way to find whatever
device needs it!
10:43 p.m.
I just tripped over an unusual cable:
It has a trapezoidal thin black box labeled "TRS0-80", but no part number,
one side has a few inches of cable with a 40 pin card edge connector,
the other side has a few feet of cable with a 50 pin edge connector.
40 pin was probably model 1 expansion bus (I hafn'y messed with model
2/12/16). But what did Radio Shack use on model 1 with 50 pin?
Is this a genuine Radio Shack part or a 3rd party thing?
If it is Radio Shack, I can think of 2 possibilities :
1) The Model 3 expansion bus was 50 pins. I seem to remember there was an
adapter to use certain hardware dvices for the M3 on the M1
2) Whether this is the same as (1) I don't rememeber, but I seem to
rememebr a product consistng of LDOS and an adapter cable to sue the M3
hard disk units on the M1.
Is there any electroncis inside? Or can't it be openeed?
-tony
11 Jan
11 Jan
12:17 a.m.
On Tue, 10 Jan 2012, Tony Duell wrote:
Is this a genuine Radio Shack part or a 3rd party
thing?
It looks like genuine Radio Shack, and has TRS-80 embossed on it, which
due to trademark issues means it is probably genuine.
If it is Radio Shack, I can think of 2 possibilities
:
1) The Model 3 expansion bus was 50 pins. I seem to remember there was an
adapter to use certain hardware dvices for the M3 on the M1
sounds reasonable. In which case, I don't know why I have it, since I
don't remember ever getting any M3 external devices.
2) Whether this is the same as (1) I don't
rememeber, but I seem to
rememebr a product consistng of LDOS and an adapter cable to sue the M3
hard disk units on the M1.
Sounds nice, but I never had a hard disk on a M1
Is there any electroncis inside? Or can't it be
openeed?
It's not intended to be opened, but I will try. carefully. It's too thin,
however, for any chips of that era.
If anybody can come up with a need for it, it's available. along with a
M1 buffered EI cable.
4736
days inactive
4737
days old
8 comments
5 participants
participants (5)
-
ard＠p850ug1.demon.co.uk -
cisin＠xenosoft.com -
geoffr＠zipcon.net -
snhirsch＠gmail.com -
terry＠webweavers.co.nz