I recently obtained a VAXmate, that Intel 286 based Digital Equipment
MS-DOS machine with builtin ethernet.
Last time I used one was around 1990, porting dutch versions of PSCA DECnet
and PC ALL-IN-1 working for DEC.
The system boots a DOS 3.3 floppy, so the hardware is fine. Underneath the
unit is the RCD32 aka oizaabox hard disk system. I hear the disk spinning,
no boot is done.
Any one has more information on this system? The system floppies that belong
to the VAXmate? Any help is appreciated.
Hans. http://www.hansotten.com
It's a midrange machine. Very good at COBOL and RPG. As a relational
database that is tightly coupled with the OS.
I'm not sure on the model numbers, but if it is in a white/beige box
it's an old timer. The latest version of the OS is V3R2, dating back to
about 1996. Black boxes mean it is a newer RISC processor model,
although there were some previous generation boxes dressed up in black
to make them sexy. :-)
Peripherals and I/O on these things are weird. It's like working in a
parallel universe. Read on the web for the gory details.
If the box is newer, there is a good chance that some of my code is
running on it in the bowels of the OS.
Mike
I have come across a stripped (but formerly working) PC chassis.
It has a generic case labeled "Computers Plus", 250W power supply,
and a motherboard with a 486DX2-66. No drives, peripherals or RAM.
Anyone want it for the cost of postage, before it goes in the
trash? Or just the motherboard?
thanks
Charles
I recently came across a manual (1956 RCA receiving tube rc-18) w/spare
tubes from the army signal corp. & electrical, tube, (etc) tech books dating
in the early 1940's. Also, there are fuses and other parts. some w/their
shipping dates and many w/the company names right on the unopened boxes.
Included in my findings is a working radio/recorder (?) unit that has enough
parts to build another or replace existing parts. I can gather from my
research that this piece of equipment was used in the war itself (WWII). I
would like to inquire about this equipment to anyone who may know or be able
to direct me to the proper place to find out more about this fascinating
device! I have seen some 411 in the history museum online, but I need more.
If you or anyone you know out there could point me in the right direction, I
would be ever so grateful! Anyone know it's value?
Thank you for your time & efforts,
Apryl
I spotted one of these in a local surplus store (Melbourne Florida). Is
it anything particularly desireable? I believe it's model number is 9414.
It's a large (30 inch?) tower and appears to be in very good condition. I
don't know anything about these and tried to find info on Google but only
found the usual collection of over-priced (or no price!) third party
dealers and other spammers.
Joe
An auction house in san antonio is having an auction of "construction equipment"
on Dec 10. However, the auction has other items including "salon & spa
fixtures" and under miscellaneous, "HP K-Class 9000 computer system". I know
nothing about this kind of system but presume that someone on this list might
care about it.
http://www.shattuck.com/liveauction/md1205.asp
Picture 1: http://www.shattuck.com/md120530.jpg
Picture 2: http://www.shattuck.com/md120531.jpg
Other than giving notice of it, I can't help in procuring/storing/shipping it.
I've got 7 MK4801AN-1 (also marked 4118A) memory chips, 24-pin DIP's.
Not sure what they go in, but if you can tell me where you want
to plug them into, I'll send 'em to you gratis.
Tim.
>
>Subject: Re: Pinout for SED9421
> From: "Chuck Guzis" <cclist at sydex.com>
> Date: Fri, 25 Nov 2005 09:24:30 -0800
> To: cctalk at classiccmp.org
>
>On 11/25/2005 at 9:31 AM shoppa_classiccmp at trailing-edge.com wrote:
>
>>to do the tweaking, as well as field service, as well as ...
>>(Of course us hackers don't mind!)
>
>I've got a system here with a rather elaborate analog data separator PLL
>(built around a CA3130 op amp). Part of the manufacturing process involves
>a calibration diskette, trimpot and scope. It's pretty robust once it's
>been set up, but component aging is probably a significant factor in
>long-term performance.
>
>It seems hardly any more robust than a plain old digital (9216-type) data
>separator. Which makes me wonder why anyone would bother implementing the
>data separator in Figure 13 of the 179x app notes (3 trimpots).
Simple, the non-digital circuits were available and the chips like 9229/9216
were later. There were really three varients, for plain FM oneshots either
analog or digital did the job well enough. When DD (MFM) started to appear
along with then current drives That didn't work well enough (peak shift)
and PLLs became the solution then around 1981 people started to figure out
how to apply write precomp and digital data seps that were either counter
based or DPLL.
>Out of the stats on performance that Allison cited, how many of those
>errors could be recovered with a simple retry?
Most were soft. Once they started to become hard the media was showing
distress.
>When I learned that Jameco was running low on 9216's, I bought their entire
>stock, which amounts to about a 2 ft. tube of 8 pin DIPS. So if you're
>looking for one, you know who's got 'em. :)
Either that a Dflop(74LS74), hex D-latch(74LS174) and 32x4 prom(74LS288).
Allison
If anyone's interested, I have a home-built UV EPROM eraser that
I can't see ever using again myself. (Everything I do is flash now
and I don't see going back to EPROM's.) It was homebuilt from a
germicidal lamp and an 8-track storage box and a ballast probably
30 years ago.
Of course, there are no safety interlocks etc.
Pick-up in/near Washington DC or you can pay for shipping (probably $8
or so.)
Tim.
