>From: "Marvin Johnston" <marvin(a)rain.org>
>
>
---snip---
Maybe this
>will be the kick in the ... seat :) to get me going and backing up all
>the Polymorphic disks (8" and 5 1/4" totaling probably a couple of
>hundred disks) including source code and documentation for their
>products.
Hi Marvin
If you get a machine running, I'll write some software, similar
to what I have on the H89 to transfer entire disk images. That
will make archiving easier.
I sent a message to Bob Bybee to see if he knew anything about
the other front panels. He was the editor for the Poly News.
Also, while digging through stuff, did you happen to come on
an extra serial interface card. I have a Poly88 that is sadly
without one.
Later
Dwight
Hello all,
thanks to der Mouse, the pictures are available under:
ftp.rodents.montreal.qc.ca/pub/cheri/
If anybody could check out the DIP Switch settings ??
I could verify the status of the LEDs either, if this helps.
Just drop in an email.
There are two identical memory boards. The one scanned is the first, that's why the two terminators are missing .
The other memory board at the end of the bus has these terminators. Switch settings are different, apparently to set an ID.
Remember, I have no documentain, but it would be worth to compare the settings of the switches and LEDs
with a working unit !
Thanks in advance for any help !
Pierre
__________________________________________________________
Mit WEB.DE FreePhone mit hoechster Qualitaet ab 0 Ct./Min.
weltweit telefonieren! http://freephone.web.de/?mc=021201
Does anyone want an HP 2621-P terminal? Lawrence has one for you. Please
contact him if interested at <lmzeidler(a)MSN.com>.
Photo:
http://www.columbia.edu/acis/history/carman.html
--
Sellam Ismail Vintage Computer Festival
------------------------------------------------------------------------------
International Man of Intrigue and Danger http://www.vintage.org
[ Old computing resources for business || Buy/Sell/Trade Vintage Computers ]
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Hey,
I have a copy of the setup program for the Vectra ES 12 computers. Do you
still need it?
Do you still have the HP 82321 Basic Language Processor cards and would you
like to sell them?
Joe Martinson
President
Martinsound Inc.
1151 W. Valley Blvd.
Alhambra, Ca. 91803-2493
www.martinsound.com <http://www.martinsound.com/>
email: jmartinson(a)martinsound.com
Phone: (626) 281-3555 Ext. 101
Fax: (626) 284-3092
I'm looking for the book ASTOUNDING ARCADE GAMES FOR YOUR SPECTRUM+ &
SPECTRUM by David Perry (published by Interface). This would've been
published in the UK (13,000 copies).
Does anyone know where to locate one? I have a friend who's trying to
find it for some research he's doing.
--
Sellam Ismail Vintage Computer Festival
------------------------------------------------------------------------------
International Man of Intrigue and Danger http://www.vintage.org
[ Old computing resources for business || Buy/Sell/Trade Vintage Computers ]
[ and academia at www.VintageTech.com || at http://marketplace.vintage.org ]
It is amazing what can be found by looking around :). I had a box of
"stuff" from Polymorphic Systems that I finally got around to checking
out. I didn't realize that Polymorphic made a keyboard, but I have a
metal chassic with "Polymorphic" on it and about 6 keyboard assemblies
that fit inside. I also found a front panel to a System HD/18, a number
of "new" System 88/DS front panels, a System 8810 front panel, various
back panels, and enough wooden sides for another 5 computers or so. All
of the front panels have cutouts for full size 5 1/4" drives. Maybe this
will be the kick in the ... seat :) to get me going and backing up all
the Polymorphic disks (8" and 5 1/4" totaling probably a couple of
hundred disks) including source code and documentation for their
products.
Does anyone know what the HD/18 and 88/DS systems were all about? I've
got another box someplace that holds a pair of 8" drives with
Polymorphic logo on it, but I haven't had time to look through all the
engineering documentation to find out what it is.
I'm seeking out information on the Kid Newton, which was some special
version of Apple's Newton. Here's a photo:
http://www.msu.edu/~luckie/kidnewt.gif
This is for a client of mine but I'm not sure what if anything this
information will be worth. If you have a write-up or more photos of this
device (or you happen to have one) please contact me and we'll discuss
further.
Thanks!
--
Sellam Ismail Vintage Computer Festival
------------------------------------------------------------------------------
International Man of Intrigue and Danger http://www.vintage.org
[ Old computing resources for business || Buy/Sell/Trade Vintage Computers ]
[ and academia at www.VintageTech.com || at http://marketplace.vintage.org ]
Dave,
You are correct that BREAK at power up will bypass the attempt to boot
>from floppy, the Cass? / Memory? Prompts here are normal.
You are correct that without the floppy controller it will boot directly
to BASIC in ROM. Again Cass? And Memory are normal. Cass? is asking for the
cassette baud rate (L=500Baud or H=1500Baud). Memory? Reserves high memory
for use by drivers etc.
When the system at startup says 'Diskette?' it thinks it's sensing a disk
in the drive, for me this typically happens when the drive door is open with
a disk in the drive.
The best web site for info, docs and software is http://www.trs-80.com/,
you should find the service and disk owners manuals for download. Ira can
send you bootable floppies for the system; he's great to work with and knows
a lot about these old systems.
When I power up my Model III I hear the heads step back to track 0 thus
you are correct that this should happen.
I'm more familiar with the MODEL III however I believe the following
applies to the MODEL 4 as well:
When you removed the floppy drive for cleaning did you reconnect it to the
same position on the floppy cable? (Cable position defines the drive
number!) Assuming this is a standard RS floppy controller and cable then the
following is true: Radio Shack removed pins from the floppy drive connector
on the cable to control selecting the drive (typically either DS0/DS2 or
DS1/DS3 will be missing on the floppy controller side of the cable), they
jumper DS0-DS3 as all active on the disk drives (if you reset this then turn
them all back on). The internal floppy connector brings only DS0 and DS1
out. The external connector brings DS2 out as DS0 and DS3 out as DS1. Again
this is ONLY 100% true for RS controllers, some 3rd party controllers used
normal pinouts on the connectors so your mileage may vary.
The LAST drive on the floppy cable MUST be terminated (150 ohm typically)
otherwise the drives won't work.
Finally - if the drive is ALWAYS selected with the power on them you have
one of the cables on upside down, most likely the end to the controller PCB
as it's typically not keyed.
Hope something here helps. :)
-Neil
------------------------------
Message: 24
Date: Mon, 11 Oct 2004 21:45:57 -0400
From: Dave Dunfield <dave04a(a)dunfield.com>
Subject: TRS-80 (IV) help?
To: cctalk(a)classiccmp.org
Message-ID:
<20041012014553.YBKR14765.berlinr.sprint.ca(a)smtp.sprint.ca>
Content-Type: text/plain; charset="us-ascii"
Hi Guys,
Picked up another big load this weekend, and am just starting to go
through it - Item#1 is a TRS-80 Model IV.
When I first powered it up, it sucked on the Empty bottom drive for
a couple of seconds, then prompted with "Cass?" and entered ROM basic.
Tried a Model IV boot disk and go the same result - so I removed the
drive and cleaned it (machine has been sitting a long time).
Now, it powers up, selects the drive and "hangs" - does not move on
to the "Cass?" prompt - I've checked all connections and socketed
chips, and everything is clean and looks OK. Have reseated everthing
several times.
A few of observations:
- If I hold RESET while I power up the machine, the drive motors still
come on, but I do not get a select - the select appears to be happening
under software control.
- If I disconnect the disk controller board ribbon cable, the machine
powers up at the "Cass?" prompt - in this case, I believe the ROM
startup sees that there is no disk system and enters ROM basic,
thinking that it is a diskless unit.
- If I power-up/reset while holding BREAK, it also gives the "Cass?"
prompt - after briefly selecting the drive - looks like BREAK very
soon after power-up can interrupt the boot process, and ROM BASIC
comes up normally.
- I never see the drive seek - it selects, but does not seek.
If I manually move the drive head out during power-off, it DOES NOT
seek back to track-0 after selecting the drive when I power it on.
- Twice so far in a couple of hours of working on it, I have seen the
prompt "Diskette?" (no cursor) after powering on the machine (with
disk controller connected and not holding BREAK). I cannot make this
prompt come up reliably.
It looks to me as if something in it's interaction with the disk controller
is hanging the machine.
Anyone here knowlegable in TRS-80's?
Can anyone tell me what the Model IV is *SUPPOSED* to do on power-up, both
with and without a boot disk in the drive (I have no documentation at all).
Any pointers to service documentation? ROM listings? Other information on
servicing a model IV - any idea how I can further diagnose this problem?
Any help at all would be greatly appreciated!
Regards,
Dave
--
dave04a (at) Dave Dunfield
dunfield (dot) Firmware development services & tools: www.dunfield.com
com Vintage computing equipment collector.
http://www.parse.com/~ddunfield/museum/index.html
***************
Hi Guys,
Picked up another big load this weekend, and am just starting to go
through it - Item#1 is a TRS-80 Model IV.
When I first powered it up, it sucked on the Empty bottom drive for
a couple of seconds, then prompted with "Cass?" and entered ROM basic.
Tried a Model IV boot disk and go the same result - so I removed the
drive and cleaned it (machine has been sitting a long time).
Now, it powers up, selects the drive and "hangs" - does not move on
to the "Cass?" prompt - I've checked all connections and socketed
chips, and everything is clean and looks OK. Have reseated everthing
several times.
A few of observations:
- If I hold RESET while I power up the machine, the drive motors still
come on, but I do not get a select - the select appears to be happening
under software control.
- If I disconnect the disk controller board ribbon cable, the machine
powers up at the "Cass?" prompt - in this case, I believe the ROM
startup sees that there is no disk system and enters ROM basic,
thinking that it is a diskless unit.
- If I power-up/reset while holding BREAK, it also gives the "Cass?"
prompt - after briefly selecting the drive - looks like BREAK very
soon after power-up can interrupt the boot process, and ROM BASIC
comes up normally.
- I never see the drive seek - it selects, but does not seek.
If I manually move the drive head out during power-off, it DOES NOT
seek back to track-0 after selecting the drive when I power it on.
- Twice so far in a couple of hours of working on it, I have seen the
prompt "Diskette?" (no cursor) after powering on the machine (with
disk controller connected and not holding BREAK). I cannot make this
prompt come up reliably.
It looks to me as if something in it's interaction with the disk controller
is hanging the machine.
Anyone here knowlegable in TRS-80's?
Can anyone tell me what the Model IV is *SUPPOSED* to do on power-up, both
with and without a boot disk in the drive (I have no documentation at all).
Any pointers to service documentation? ROM listings? Other information on
servicing a model IV - any idea how I can further diagnose this problem?
Any help at all would be greatly appreciated!
Regards,
Dave
--
dave04a (at) Dave Dunfield
dunfield (dot) Firmware development services & tools: www.dunfield.com
com Vintage computing equipment collector.
http://www.parse.com/~ddunfield/museum/index.html
