Tony (and others),
> I have the schematics of the ST225 somewhere.
I misremembered about the drive - I've just had the case off the machine to get
some pictures in response to Stefan's post about the P4500 (at
www.moosenet.demon.co.uk/temp/p3800 for anyone who's interested)
The drive's a Rodime 202E which going from memory is 50MB or so.
I'm quite keen to see if I can get this thing running now as it's got me
curious. The key at the front has 3 settings - off, on and 'pm' - I have no
idea what the latter does but the abbreviation might mean something to
someone??
Applying power I get LEDs on the back of all cards, plus one labelled as +5V on
the power supply board. No fan activity though and no hard disk spindle motor;
maybe a +12V rail is dead or the problem might be more tricky to diagnose.
There's five LEDs on the front of the case - labelled 1,2,3 and 4 plus one with
a power symbol - none of those light when power is applied.
Might be something stupid like the system is waiting for a console command
before starting the disk but that's probably a little too hopeful :-)
There's 6 cables hanging out the back, all terminated with 25 pin connectors.
One's black and unlabelled, another is grey and unlabelled, and all the rest
are grey and labelled as: '8 bit 3100', '16 bit 3100' '8 st' and '8 st4'. Mean
anything to anyone? Are those terminal types or something?
I'll reseat all the cards tomorrow and measure a few voltages to see what's
what - plus connect the hard drive to a known-good supply and just check it
does spin up.
IC dates are all in 1984 so it's more recent than I thought (I'd guessed '82 or
so) but no idea when it last ran or what it was used for. Hopefully the disk
wasn't wiped prior to it being submerged in a flood! :)
cheers
Jules
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I would say that the three original manuals and the DOS SW contributes
mightily to the value to collectors.
When Items like this sell for such high values I notice they usually include
the original Software and manuals. Often they have the original boxes.
Also condition is very important to collectors. This one purports to be in
near perfect condition which is somewhat rare in its own right.
Paxton
Astoria, OR
I have been searching for information regarding the assembly of a Micropolis 1991 hard drive.
What is the best method to disassemble the case to access the latching area?
Dave S
>From: "Don Maslin" <donm(a)cts.com>
>
>
>On Tue, 29 Oct 2002, chris wrote:
>
>> Ok, anyone know of a safe way of removing a glued on heatsink? I have a
>> few of these 486 CPUs where the heatsink is glued down. I could just jam
>> a screwdriver in and snap it off, but that just doesn't seem very good
>> for the chip.
>
>Better a single edge razor blade or a putty knife than a screwdriver!
>Too much local load with the screwdriver blade - probably crack the
>chip.
> - don
>
>> -chris
>> <http://www.mythtech.net>
>>
Hi
I've always removed glued things from chips by heating it
first with a hot plate. We used to remove the epoxied covers
>from EPROMs this way in the lab when someone would plug one
in upside down. This way we could replace the blown bonding
wire ( the most common failure for reversed power ).
It was handy to have a wire bonder around ( Ah, the good old days ).
Dwight
> Does anybody know anything about a Philips P4500 ??
> I just now the size which is well, a decent size.... :)
> Maybe someone has a picture ?
not as such, but maybe it's a bigger brother of my P3800. In which case I'll be
amazed - I heard of one other Philips system a few years ago which was a
similar but more basic version of mine (P---, can't remember the number now),
but the owner had long since disposed of it when I made enquiries. Never come
across anyone who has the same system as mine, or even heard of it, and not
heard of a 4500 either.
My unit's about 1 foot wide, 4ft deep and 3ft tall and is some kind of
multi-user CP/M system, or so I was told. It certainly has a lot of Z80 CPUs on
the cards in the cardcage! Not a particularly lightweight system either.
I can email an image off-list if you want.
cheers
Jules
__________________________________________________
Do You Yahoo!?
Everything you'll ever need on one web page
>from News and Sport to Email and Music Charts
http://uk.my.yahoo.com
Hiya,
Does anybody know anything about a Philips P4500 ??
I just now the size which is well, a decent size.... :)
Maybe someone has a picture ?
Stefan.
>Whats this nubus card?
>
>Workstation Technologies card. No idea but I believe it was an early video
>conferencing setup. Appears to have an ADB or S-video connector, mini-Din
>serial, a three row DB-25. Has a 68030/33 processor on board so it must
>have some amount of horsepower in its day. Awesome looking card anyway.
Hey.. no fair... I was going to buy first, ask questions later! (does
this mean you beat me to responding to the guy on this?)
-chris
<http://www.mythtech.net>
I've had a "grab bag" of chips in a box for months that I haven't had time
to sort. Last night I got the bug, and while straightening pins and
sorting, I found an AY-3-8500-1, one of the original "Pong on a Chip" chips.
I found some schematics online quite easily. Condition of the chip is
unknown, and I guess I'm going to have to build to find out, unless one of
you has a suggestion for a quick health check?
Patrick
Tom Uban wrote:
> At 04:28 AM 10/29/2002 -0600, [Tothwolf] wrote:
> >http://www.vintage-computer.com/images/VCF5/Tony%20Cole%20Vendor.jpg
> >http://www.vintage-computer.com/images/VCF5/MemoryBillia2.jpg
> >
> >Does anyone recognize the drive with the numeric pad and LCD on the far
> >right of the above two photos? It looks nearly identical to the 4 drives
> >in my SGI 210S, and I'm still not exactly sure what type they are.
>
> It was labeled with a Seagate brand, but I think that when I last used one
> like it it was a CDC brand drive, perhaps a Sabre.
Didn't Seagate buy that part of CDC's disk drive business?
-Frank McConnell
I didn't realize that Integer BASIC also included the ROM image...in which
case I don't need it.
Was there a special manual for those commands or were they covered in the
DOS 3.3 book?
Thanks.
-----Original Message-----
From: Sellam Ismail [mailto:foo@siconic.com]
Sent: Monday, October 28, 2002 8:08 PM
To: cctalk(a)classiccmp.org
Subject: Re: Apple II Programmer's Aid ROM
On Mon, 28 Oct 2002, Eric Smith wrote:
> Rich wrote:
> > I just read about this in the A2FAQ. Does anyone have this Apple ][ ROM
> > and manual?
>
> If you've got a DOS 3.3 Master diskette (or a "BASICS" diskette), you've
> got the ROM image. It's in the INTBASIC file on the DOS 3.3 Master.
>
> I've got a manual, somewhere.
And of course if you boot the DOS 3.3 System Master on a 64K Apple ][, it
will load the Integer BASIC ROM image (containing the Programmer's Aid
ROM) into the upper 16K of memory.
Then you can switch into Integer BASIC from Applesoft BASIC by typing
'INT' (which is a DOS command). To get back to Applesoft type 'FP' (for
Floating Point, as in floating point BASIC).
INT basically bank-switches in the ROM image in RAM. You can also press
RESET to get back to Applesoft. Switching using either command will init
your environment from scratch (i.e. any BASIC program in memory, either
Applesoft or Integer, is lost).
Sellam Ismail Vintage Computer
Festival
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