Please contact DonaldF F Christensen <dfcsenior(a)JUNO.COM> if interested.
Do not reply to me. Good luck.
>X-Mailer: Juno 1.49
>Date: Wed, 11 Aug 1999 16:18:22 -0400
>Reply-To: DonaldF F Christensen <dfcsenior(a)JUNO.COM>
>Sender: Heathkit Owners and Collectors List <HEATH(a)LISTSERV.TEMPE.GOV>
>From: DonaldF F Christensen <dfcsenior(a)JUNO.COM>
>Subject: FS vintage computer
>To: HEATH(a)LISTSERV.TEMPE.GOV
>
>Vintage computer collectors: I have the following Heath/Zenith components
>for sale
>or trade: One Heath/Zenith H-89 All-in-one Computer/monitor/keyboard;
>one Heath/
>Zenith H-25 Dot Matrix printer-big one; One Heath/Zenith H-37 Dual Floppy
>Disk Drive;
>One lot of instruction books, data, etc, etc. The computer components are
>in very good condition. If anyone is interested, please let me know. I
>will not ship-for pickup only
>in central Michigan. Thanks. 73 Don W8WOJ
>
>Sponsored by the City of Tempe
>
>Listserver Submissions: heath(a)listserv.tempe.gov
>Listserver Subscription: listserv(a)listserv.tempe.gov - "subscribe heath
>'name' 'call'"
>Listserver Unsubscribe: listserv(a)listserv.tempe.gov - -"signoff heath"
Christian Fandt, Electronic/Electrical Historian
Jamestown, NY USA cfandt(a)netsync.net
Member of Antique Wireless Association
URL: http://www.antiquewireless.org/
Hi Tony,
>....(read : most microcomputers...) get stuck behind stuff I'm
>working on. Which means to get to the Nimbus I'll have to climb
>over a couple of VAXen, a Zilog S8000, a Sun, etc...
Heh, heh, I know the problem well.... ;-)
>....I think you can learn as much from a Beeb or an Apple ][ as
>from a PC. If not more.
Personally I'd say more.
A few years ago I decided to get a formal qualification in electronics (I've
been a hobbyist since '77). As part of the course we had to learn the proper
techniques for fault finding digital systems....we were taught these using
microProfessors and similar 6502 based boards (I forget their name....hex
keypad, couple of VIAs, LED readout etc).
"Primitive" systems like these (and Apples and Beebs) I think are far better
animals on which to learn the inner workings of computers, far too much is
hidden away inside the VLSIs our PCs are made from these days. :-(
TTFN - Pete.
--
Hardware & Software Engineer. Sound Engineer.
Collector of Arcade Machines, Games Consoles & Obsolete Computers (esp DEC)
peter.pachla(a)virgin.net |
peter.pachla(a)vectrex.freeserve.co.uk |
peter.pachla(a)wintermute.free-online.co.uk | www.wintermute.free-online.co.uk
--
Hello all:
Does anyone have jumper information on these two old drives? Both are 5.25"
drives pulled from old PCs. The jumpers are not marked (except for jp1, jp2,
etc.). I need to configure them for use with a TS2068 fdd i/f.
The drives are:
Epson SD-621L
Teac FD55-GFR
If you can point me in the right direction I'd appreciate it.
Glen Goodwin
0/0
You'd be better advised to use a really fine diamond lapping paste as you
might obtain from an industrial supplier. There are fine enough pastes
available that one can lap to a .000003" finish . . . essential if you're
making Jo-blocks, but probably overkill for your task. If you contact an
outfit like Manhattan Supply Corp, which has branches throughout the U.S,
you'll find something suitable and probably in a quantity you can afford.
If you're worried about the head flatness, I'd not try this trick until
you're more sure of yourself, though.
-----Original Message-----
From: Tony Duell <ard(a)p850ug1.demon.co.uk>
To: Discussion re-collecting of classic computers
<classiccmp(a)u.washington.edu>
Date: Tuesday, August 10, 1999 3:24 PM
Subject: Re: 14" hard drive refurb....
>>
>> Ok, I know this sounds crazy....
>>
>> One person told me that if the heads were heavily oxidized, that they
could
>> be cleaned with a soft toothbrush and TOOTHPASTE (followed by a rinsing
in
>> 91% alcohol)???????
>>
>> Anyone know if this is crazy or advisable?
>
>Toothpaste is a fairly mild abrasive that does sometimes help in
>cleaning/polishing things. I've used it on the plastic covers from panel
>meters, for example.
>
>But I'd not use it on a disk head. My feeling is that you will damage the
>surface. I doubt if you'd ever get it flat enough to work.
>
>No real evidence, though, but I sure wouldn't try it.
>
>-tony
>
Well, I got enough of the oxide off to see there is definitely a few scores
in the ceramic pad. Since I'm a total neophyte at this, I decided to get
some professional help (related to the disc heads <grin>). I located an
outfit with the following prices:
1) New heads - $135.00 each
2) Replace the pads, check the spring, and test fly - $35.00 each
3) Clean and recontour the head - $20.00 each.
Just to be safe, I'm probably going to go with option two, and at least I'll
be sure the heads I'm putting in aren't going to destroy the platter. Does
anyone know of an outfit that gives better pricing here in the states?
Jay West
G'day,
In the past, I've asked for information on the Weitek [Graphic] Array
Processor. Well, I've located some documentation for it and accompanying
software: WAFT, Weitek Assembler with Flexible Translation, APSIM, Array
Processor SIMulator, and QUAKE :-).
The board has one integer processor (an equivalent of 4 Am2901's + Am2910)
and one floating point processor (2 WTL1066 register files, 1 WTL1032 ALU
and 1 WTL1033 multiplier). Manual claims that performance of this hardware
reaches 8 MFLOPS. Clock frequency is 4 MHz.
I've not found any reference to this product (by name) on the Net. From
comments in source code, it looks like Thomas J. Riordan, Craig Hansen,
and Michael Ekberg were involved in the design of this product.
Does anyone remember this product?
I'll have to verify that hardware is working, but there is a good chance
that it is OK.
--
Sergey Svishchev -- svs{at}ropnet{dot}ru
G'day,
I am looking for the following manuals (in dead-tree, microfilm or -fiche,
photo- or xerocopied, or scanned form).
For better support of VAX 8200 series in NetBSD/vax:
*** Digital Equipment Corporation
Paul Wade "The VAXBI Bus -- A Randomly Configurable Design",
Digital Technical Journal, February 1987, pp.81--87
EB-27271-46 VAXBI Options Handbook
EB-28190-46 VAXBI Technical Summary
EK-DEBNT-TM DEBNT Ethernet Tape Controller Technical Manual
EK-DEBNX-TM DEBNA/DEBNT Technical Manual
??-?????-?? BVP Architecture Manual
EK-DMB32-TD DMB32 Technical Description
EK-DWBUA-TM DWBUA UNIBUS ADAPTER TECH.
EK-KA820-TM KA820 Processor Technical Manual
EK-MS820-TM MOS Memory Technical Manual
EK-KDB50-SV KDB50 Disk Controller Service Manual
EK-ORA60-SV RA60 Disk Drive Service Manual
EK-ORA81-SV RA81 Disk Drive Service Manual
EK-ORA82-SV RA82 Disk Drive Service Manual
AQ-FJ86L-ME VAXstation 8000 hardware files
EK-VS800-IG VAXstation 8000 Installation Guide
EK-VS800-OM VAXstation 8000 Owners Manual
EK-VS800-SG VAXstation 8000 Service Guide
EK-VS800-SM VAXstation 8000 System Manual
EK-VS8PL-TM 8-PLANE GRAPHICS COPROC
(If I guessed right, this describes VSB70 --
Evans & Sutherland graphics hardware in VS8000)
EK-KA800-TM KA800/MS800 Technical Manual
EK-KFBTA-TM KFBTA Disk Controller Technical Manual
Most part numbers were found in Digital Assisted Services catalog; if you
think something that's not in the above list might be useful too, let me
know.
For (nonexistant yet, and possibly going nowhere) NetBSD/tek4300 port:
*** Tektronix Inc.
Everything about these VME boards: CE ( = 4301 Application processor), PP2
(Picture Processor 2), ZB (Z-buffer), FB8M (8-plane frame buffer), CP.
This board set forms a Tektronix 4336 workstation.
I'm also looking for spare parts, option boards (esp. memory expansion for
4301!), and other machines of the 4300 series.
*** Weitek
Everything about Weitek 1167 Floating Point Accelerator. It is an optional
item for Tektronix 4301.
--
Sergey Svishchev -- svs{at}ropnet{dot}ru
G'day,
I fired up a VAXstation 8000 that was sitting in a corner collecting dust.
After some fiddling, I managed to get it to work -- at least partly. It
would not even show the chevron prompt until I pulled the KK810 cable
(KK810 is "Control Assembly") out of GIF (Goes In First) BI bus terminator.
Even then, no luck: (DU50 is a RD54 that is hung off KFBTA)
Hand transcribed logs:
Plain boot:
>>> B DU50
01000000
%BOOT-F-Failed to allocate PFN bitmap
Boot with memory test disabled:
>>> B/R5:84 DU50
01000000
%BOOT-F-Unexpected exception
PC=000003E1
>>> B/R5:2004 DU50
01000000
%BOOT-W-Ten percent or more of main memory is bad
%BOOT-F-Insufficient memory for CI
Boot with boot breakpoint set:
>>> B/R5:20 DU50
1 BRK AT 00003E8C
00003E8C/7E5BD001
Something is obviously wrong, but without docs I am going nowhere...
Comments? Advice?
--
Sergey Svishchev -- svs{at}ropnet{dot}ru
I, like other DECUS members, just got a letter from Compaq
assuring me that VAX (and OpenVMS) support will continue for
another ten years - although the VAX family will be retired.
Now wouldn't that letter have been much more exciting if they'd
decided to open-source all the other retired DEC products?
- John
>On Mon, 9 Aug 1999 21:33:07 -0600 mark acierno
><macierno(a)cvm.msstate.edu> wrote:
>> questions
>...
>> 2)Does anyone have any software for it? I had a whole bunch (but that was
>> 1981)!I can still remember a company called AARDVARK SOFTWARE sold a
bunch
>> of great games........
I've got Sargon II (Hayden Software I think) on cassette for the 1p floating
around here somewhere. Bill, is this one that you have and have slated for
wav conversion and posting?
;)
- Mike: dogas(a)leading.net
