I'm still looking for help with the second rescue attempt in Georgia and
need either 182 donors of $10 each or 1820 at $1 each. I would like to get
to these items before winter really gets here, so please if you can spare a
$1 (one buck) send it to the Houston Computer Museum, 15827 Thistledew
Drive, Houston, TX 77082-1432. Cash or a check will do. Again the first trip
was a great success and many thanks to all donors for that rescue.
Thanks in advance to all,
I'm doing research for another potential emulation project. Does
anyone have a pointer to an electronic copy of the Tandy Model 2000
Programmer's Reference Manual (260-5403) and the Hardware Reference Manual
(260-5404)? Alternatively, if someone has hard copies that I can make a copy
of, that'd work.
Thanks a lot.
Collector of classic computers
Lead engineer, Altair32 Emulator
Web site: <http://highgate.comm.sfu.ca/~rcini/classiccmp/>
Web site: http://www.altair32.com/
Tony and others -
The head load pad looks visually fine. The head load spring tension
appears pretty normal , and the solenoid pulls in nicely.
The drive consistently reads the first 10 or so tracks, then tosses
various number of errors as it goes further out.
I've cleaned the head, and cleaned/lubed the spindle. The track 0
sensor appears fine.
It is indeed possible that the alignment is off - that would probably
explain the poor performance as it steps out.
I guess a worn out head would have the same symptoms.
I the 70's I had a neat Dysan digital alignment disk that I used to
realign a few SA901 and SA801 drives.
Unfortunately I no longer have it. I suppose I could mark the position
of the stepper and slightly rotate it in each direction to see if it
If someone can point me to an actual alignment procedure I'm game - I
have reasonable scopes etc here.
I'm not anxious to replace the entire drive, but I would love to get
this up and running!
Any help/suggestions greatly appreciated.
Other faults that I've had were a mis-aligned track 0 sensor (causing it
to step out beyond the outermost formatted track on the disk), and a
low-tension head load pad spring. In the latter case, taking the thing a
aper and bending the torsion spring by hand got it going again. The only
problem was reassembling it, I found it necessary to make a dummy pin to
hold the spring inside the load arm that was then pushed out when the
real pin was inserted through the head mouting.
In any case, before replacing something as large as a drive unit, I'd
want to know which of the various parts was the problem. Do you know, for
example, that the head load solenoid works and pulls in correctly? That
you can get a signal from the track 0 sensor? That the spindle is
turning? and so on...
I was wondering if there's anyone else out there interested in someday
building a Magic-1 and/or D16 homebrewed CPU computers. If so, I'd like
to organize a group buy for some of the harder to source parts.
Specifically, the 74F382 and probably 74F381. My favorite chip broker has
a $50 minimum order.
dgriffi at cs.csubak.edu
A: Because it fouls the order in which people normally read text.
Q: Why is top-posting such a bad thing?
Q: What is the most annoying thing in e-mail?
Due to an urgent need for more space, I'd like to know if anyone
would be interested in taking ALL of the following off my hands.
Doesn't have to be one person - feel free to club together with
whoever you feel like if you can arrange it fairly quickly. I just
don't want to ship individual bits of this or that to the four corners
of the globe - I don't have time :(
HP 85 - 5 machines (one or two may be missing a few keys). I posted
about these (and the 86Bs) on this list a while ago.
HP 86B - 3 machines. All work, for varying degrees of "work". One
seems totally OK, one seems to work but various characters of the
screen are stuck as "M" right from switch on, so I'm guessing video
RAM trouble. One has an unresponsive keyboard - a couple of the keys
work but that's it. This one also has keys missing, so is probably
best used as spares for the other two.
There are RAM cartridges and ROM drawers on offer with these as well,
also 5 off 9121 dual single-sided 3.5" HPIB drive and 1 off 9122 dual
double-sided 3.5" HPIB drive, also 3 brand new rolls of paper and 6
Sun Ultra 2 300(ish)MHz - 384(ish)MB RAM
Sun Ultra 1 140MHz, not sure how much memory is in it
Sun SPARCstation 4, 110MHz, 96MB RAM, 1GB (I think) disk
Sun SPARCstation 5, 90MHz, there's some memory in it but not sure how much
Sun SPARCstation 2, 2 off, there's memory and disks in both
Sun SPARCstation IPX, 2 off, both have memory and disks I think
Sun SPARCclassic, faulty
Sun SPARCstation SLC, has memory
Sun SPARCstation ELC, has memory
Sun SPARCstation ELC (faulty) - not sure if this one has memory
Box of the system board and socket board combos from
died-of-video-problems SPARCstation ELCs. There are about 8 or so of
these, all have memory IIRC.
Sun EXP-2 disk pack (the 386i style one) - 4 (one is for spares only).
All have disks and/or tape drives in
Sun type 411 disk enclosure, DAT tape drive fitted
Sun type 411 disk enclosure, 4.3GB IBM harddisk fitted
Sun type 611 UniPack disk enclosure, 7 off, all closed-face type.
Most, if not all, have various low-ish size harddisks fitted
Sun type 711 MultiPack disk enclosure, takes 12 SCA harddisks in SPUD
brackets, complete with keys
Sun "SBUS Expansion" with card and cable
Sun GDM-17E10 17" monitor. Last known working, can't guarantee it still is
Sun CPD-1790 17" monitor, works
Sun GDM-20D10 20" monitor, 2 off. Both have different faults. One
works fine once it's warmed up, but while it does the size of the
screen "bounces" alarmingly all over the place. One has (as is written
on the casing in biro) "LINE JITTER PROBLEM". These are stunning
looking monitors - one even has its IR remote control. Make one good
one out of the pair
SGI 14" monitor. Yes, I didn't realise that any 13w3 monitors were
ever made this small, but here it is. Don't know the model number
Huge box full of SBUS and UPA cards. Along with loads of CG3 and
501-2015s and stuff, there are some rarities in here (Vigra VGA cards,
4 off; others as well)
Box full of Sun accessories - audio output breakouts, serial adaptors,
drive mounting sleds, all kinds of stuff
Huge box* full of SCSI cables of all varieties, from Sun DD50 right up to VHDCI
Huge box* full of serial cables and RS232/MMJ-related adaptors
Huge box* full of IEC 320 power leads
Boxes of mice (Sun SDB, PS2 and serial)
About 10 PC keyboards
About 10 Sun Type 4 keyboards
One or two Sun Type 5 keyboards
One Sun Type 6 USB keyboard
DEC MicroVAX 3100-30 - not sure if these have memory, they don't have disks
DEC LA38 teletype
DEC VT510 dumb terminal - 2 off
DEC BA356 disk array - full of 4.3GB and 9.1GB drives. Has a
personality module fitted, but I couldn't tell you what kind it is
Other dumb terminals - there are about 20 of various kinds, including
a Lear-Siegler ADM-11 which is retro-tastic
Box of old SCSI and IDE harddisks
19" rack mount 10baseT network hub - 24 ports I think
Drawer full of motherboards, 486 to Pentium era
Various old media (including some hard-sectored 8" floppes which I
think belong to something Tektronix)
3.5" floppy disk boxes - 3 of the "square" style (2 disks wide) and
one of the "narrow" style (1 disk wide)
Mac Plus 1Mb. Also an Apple 20SC harddisk to go with this - don't have
the cable, though.
Few miscellaneous external SCSI disk enclosures of various sizes
Some x86 machines - few 486s, couple of Pentia (~120MHz) and two more
- One DEC which has the CPU on a removable daughterboard (I have 3 of
said boards - two are a single 486 and one is two Socket 5 Pentia. I
can even give you the matched pair of P133 CPUs I bought to put in
this). This machine has onboard Adaptec Wide SCSI.
One Full Tower AT - will take (IIRC) 5 3.5" drives in a nifty
swing-out cage, and 5 half-height drives (CDROMs etc). Currently
fitted with a P200 with 64MB RAM and an Adaptec 2940W SCSI card.
APC UPS system (don't know the model number offhand, but a smallish
one) - batteries are duff, but I bought a slightly bigger battery
(which has to go outside the case) and all the necessary big wires and
connectors to be able to wire it in for use
Entire shelf full of CDROM drives, including 4 Nakamichi 5-disc
changers (two SCSI and two IDE)
7 off 3.5" HD floppy drives
Several large bags full of various cables and x86 accessories (floppy, IDE, ...)
Few boxes of various ISA/VLB/PCI cards - mainly graphics and network
Probably a bit more stuff that I haven't listed, as well
The catch: you must take it ALL. Currently, it's filling a room (and
overspilling a bit from that) and I want it gone. I'd say this is
going to fill at least 2 estate cars, so you'd probably want a van. I
can help you pack and carry it out.
How much? Make me an offer. The offer can be from "free but I can have
it gone REAL SOON" upwards. I really wouldn't say no to some cash ;)
This stuff is teetering ever closer to getting landfilled; I'd hate to
see it be lost to the community but I honestly can't keep it any
longer. I hope someone/some group out there can give it a good
* where these are concerned, you can take the *contents* of the box
but not the boxes themselves - they were quite expensive. I have many
flat-pack cardboard boxes and can make some up for you to take stuff
Surplus dealer saved an odd looking box for me. It's a WANG, slightly larger
than a typical PC with monitor and keyboard. Comes with a case of floppy
disks, most of which are original WANG labels. I couldn't make out much from
them other than some of it was some productivity type software. The front
dimensions were square (Width = Height) and the depth was unusually deep
(maybe 2.5 to 3 feet). In the front was a power switch, 5.25 floppy drive,
and visibly the front of some small hard drive (looked like the old IBM PC
The thing that piqued my interest is that it supposedly had 10 terminals
hanging off the back of it before it was brought in. I'm going back tomorrow
to pull it out and get more info about it.
At 19:30 -0500 9/17/06, Jochen Kunz wrote:
>Sometimes it helps this old hardware to be "kreidlered". I.e.
>disassemble the whole machine, reaseat all PCBs and connectors and try
>again. (Sometimes connectors get a litle bit of corrosion etc. that is
>cleand out by un- and repluging the connector.)
Thirded (1). I have a Mac Plus with Brainstorm accelerator
(16 MHz 68000, plus SCSI chip upgrade). It has been giving me fits
with intermittent operation for years. Tuning the 5V setting on the
analog board *right up* against (but not over) the crowbar seemed to
help, but it'd still reset periodically. Best diagnostic I have is
(unfortunately) still a Radio Shack Archerkit analog VOM, which does
not show momentary Voltage transients.
Finally, this month, I was doing battle with it again, got
the 5V setting tweaked up and the machine running face down, but then
it failed when I set it back up on its feet. At long last, during the
post-failure examination, I took loose and re-seated the power cable
>from the analog to digital board at the *analog board* end. I'd done
this dozens of times at the *digital board* end - that's a lot less
likely to take out the end of the CRT when my hand slips - but not at
the analog board end.
Machine has been running without problems since then. Wife is
re-addicted to Dark Castle (and I have to put in a good word for
Delta Tao on that score, they just sold me, at a discount, the
original software! (2) ), kids getting addicted to Concertware +
MIDI. Next project may be to find a MIDI interface for the thing and
start learning more about digital music.
(1) I'm curious about the etymology - where does the expression
"kreidlered" come from?
(2) Not affiliated, but if I had to choose one company in the field
to hold up as wonderful, Delta Tao would be it.
Mark Tapley, Dwarf Engineer
(I haven't cleared my neighborhood)
On 9/20/06, Simon Fryer <fryers at gmail.com> wrote:
> I'll find out of the computer museum at Bletchley Park would like any
> of the items.
Jules Richardson, who works at the Bletchley museum, has already
posted in this thread with what they'd like :)
Jules Richardson wrote:
> [snip] it's perhaps worth rescuing the Tek
> hard-sectored disks for the museum; that's assuming that nobody has a more
> pressing need for them (and their contents!), of course - I just wouldn't want
> to see them go to landfill.
> Small hard disks (particularly SCSI rather than IDE) are also worth rescuing
> if nobody else wants them.
> Oh, I believe we're short a few Sun type 4 keyboards for all of our Sun kit
> (assuming the ten that were listed don't belong with the machines that were
> also listed :-)
> The UPS would be darn handy for the couple of new servers that have been put
> into action recently...
Austin, who's stated that he wants all the Sun kit (though it seems to
be in high demand ;) has let me know that he's happy for all but a
couple of the keyboards to go to Bletchley. I've had no requests so
far for the UPS, box of small harddisks, or the Tek 8" floppies other
than Jules's one (though several people have pointed out that said
floppies should be saved - don't worry, I'm not going to landfill
those even if some of the hardware does go. They will go to somewhere
where they'll be preserved), so I'm guessing that lot goes to
Bletchley (if it can find transport there) unless anyone else wants?
There are most likely enough Sun keyboards that some go to Bletchley,
anyone who wants just one machine can take one, and then some can go
with Austin. I want to be as fair as possible about this :) I'll do a
proper count of them over the next few days and post back here.
John Shadbolt wrote:
> Thanks Ed for offering this grand collection.
No probs. Having been on this list for years, it was my first port of
call for sure :)
> I am particularly interested in the HP-85s and 86Bs,
If you're not thinking of keeping all of these machines, would you be
able to keep in touch with Vassilis, and this list, to find good homes
for the others? I did have some interest when I initially advertised
them shortly after I rescued them, but being unable to get onto
testing them I wasn't able to do anything further about it.
I would like any ROMs that Vassilis doesn't already have archived in
the www.series80.org collection to go to him first for the use of the
community. Actually, it's not going to take particularly long to pull
the ROM drawers and inventory what I have here - I'll get onto that
within a few days and post back here.
> but could take other stuff too if it helps (eg Sun).
I think some of this Sun kit has found homes several times over by now
;) There's a stack of MicroVAXen you're quite welcome to take on,
by any chance does anyone use this method, and would
be willing to small *even* number of sheets? The one
place I know of that sells it has a $50 minimum order
(Halted). Or maybe someone knows of a place with fewer restrictions.
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