I just picked up an AppleII and 2 FDDs with a bunch of add-ons
at a local thrift store. The only Apple I have explored is my Mac+.
Anyone able to identify the cards ?
A Disk II interface card...... obvious.
Ram Module by Multiflex Tech Inc.....I imagine additional ram
Grapple+ Printer Interface......... Serial, Parallel ??
Multiflex Tech ...Long card with kludged cable to an RCA male
connector and another to a clothes-pin chip staddler labelled
AP TC/14. Two labelled chips "Firmware" and "Char. Gen." (imagine
this is a video card of some sort.)
Modem 80 card with 2 tel. jacks........... Baud-rate ?
CableTV kludge to a "SUP 'R' MOD CH.33 TV Interface Unit ??
External added-on connector 2x3 blade (like an AC outlet but with 3
pairs of smaller female recepticles in one unit) ??
It also has what I imagine is stock Ext. video (single RCA) and
cassette (2 mini-pin i/o )
Any help appreciated.
ciao larry
lwalkerN0spaM(a)interlog.com
Last fall, I bought a Model 100 which was fine, except the LCD
doesn't work. I thought I could fix it, but find I really have
no time to troubleshoot it . ..
I'm willing to resell it to anyone on this list for $10 + shipping,
send me e-mail if you're interested.
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Charles P. Hobbs __ __ ____ ___ ___ ____
transit(a)primenet.com /__)/__) / / / / /_ /\ / /_ /
/ / \ / / / / /__ / \/ /___ /
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> > 1) Check the PSU in the 11/34 CPU. It's probably fine,
> > but you don't want to ruin all your boards
>
> How should I check the power supply? I know that many people here
> say you should always do this but with the small cheap micros I've
> picked up so far I haven't bothered.
Disconnect the PSU from the backplanes. Inspect it visually to make
sure there are no obvious uprooted components, cooked tracks, etc.
Connect dummy loads between the important supply rails and ground (I
think they are +5V +15V and -15V in a PDP - Can someone confirm this?
Do you need a load on the 20V rail as well?) and switch on. Measure the
voltages across the dummy loads.
Generally the 15V rails don't need to be loaded very heavily - a
resistor of 100 ohms rated at a few watts ought to do it. You ought to
try and draw several amps from the 5V rail - a 6V car headlamp bulb is
ideal. Light bulbs make good dummy loads in any case because you can
see if there is any current there...
Beyond that, there are plenty of PDP hackers on this list who can take
up the story at this point...
Philip.
PS I too will admit to not doing this nearly often enough...
Sam Ismail <dastar(a)wco.com> wrote:
> The Lawrence Livermore National Laboratories (across the street from my
> neighborhood) auctioned off their Cray in 1993 and it was sold for $10,000
> to some oaf who said he could get lots of gold out of it and was thus very
> excited (there was a newspaper article about it). I was incensed, but oh
> well. I expect there will be similarly high bidding by the scrappers on
> this poor guy as well.
Hmm, Tony Cole? Seems he has put one on display at The Computer
Museum's History Center and is selling bits and pieces of others,
encased in Lucite as geek memorabilia. There was a story about this in
the San Jose Mercury a while back, which probably means that it's up
on their web site, hmm....
http://www.sjmercury.com/columnists/cassidy/docs/mc011898.htm
-Frank McConnell
I have a slightly wierd problem. Not sure if it is hardware or software.
Ok, I turn the 4p on with no floppy in the drive. It says:
The Floppy Disk Drive is not Ready. (in 3 languages, no less)
I put in the TRSDOS 6 system disk, the system appears to boot,
but the monitor looks like there is no sync. It is very fuzzy. I can type
in the date, and enter a command (dir :1), and the system appears to
do it.
Why does actually getting booted up cause the monitor to be unusable?
Trying other disks in the drive, if they are not system disks, causes other
messages to appear, perfectly readable.
Any ideas?
Kelly
Greets:
This weekend I had a great run of the swap meets, etc., in Wichita,
Kansas and came home with about 50 different machines, tons of software,
etc., etc. Anyway, there are two specific machines I would like to ask
about now, I will post further questions on several others in the
future.
First, I picked up an Epson HX-40 laptop-sized computer. On the front it
says MagicBox above the LCD screen. On the back there is a battery bay
as well as a rom chip bay, and it says Epson HX-40 Model # H401A. I
understand this machines runs off of program-specific rom chips. It has
a chip in the slot under the trap-door, and when I boot it, it comes up
to a pharmacetical company inventory, order, etc., menu. The machines
runs off of 4 AA batteries or a AC adapter. It really is a cute machine,
but I want to know more. In searching the web, I find 1 measly reference
to this machine... yes, 1 (or two), neither of which give any info. on
this machine. It is listed on a guys resume as having experience in
working with it. I do find a lot of information on the well-known Epson
HX-20 --- known as the 1st laptop computer. In finding pictures of that,
this one looks really similar. This one has ports labeled BCP and one
labeled SP on one side, and on the back is the cassette, seriel, and
RS-232C, printer, and power adaptor ports. There is also a 50-pin port
on the opposite side with no label. I guess what I am wondering is if
any of you have some more information on this little guy? No year can be
found on it, but I suspect early 1980s. Does anyone have any other
'chips' for it to insert other software into memory. Are these units
rare? Please let me know any information. If you're interested in it let
me know that to.
Next, I am curious about a Data General One laptop computer I picked up.
Specifically, I need to know what type of power supply it takes, as I
can't find that information anywhere. It says it is ms-dos based, but I
am wondering what dos would run on it. It has 2 3.5" disk drives (Epson
drives), and I am curious as to if it had a hard drive? It has a
full-screen, I would suppose monochrome? Could it display graphics,
etc.? Also, when was it made?
*any* information on the above two items most certainly are welcome, and
would be quite appreciated. Please let me know if you are interested in
getting either one of these as well.
I will post some more very unique items in the next couple of days that
I was lucky enough to get my grubby little hands on....
Thanks in advance,
CORD COSLOR
--
___________________________________________________
| Cord G. Coslor : archive(a)navix.net |\
| Deanna S. Wynn : deannasue(a)navix.net | |
|---------------------------------------------------| |
| http://www.geocities.com/SiliconValley/Vista/4395 | |
|---------------------------------------------------| |
| PO Box 308 - Peru, NE - 68421 - (402) 872- 3272 | |
|___________________________________________________| |
\____________________________________________________\|
How much sense does that make? Isn't it a bit like saying "You can
pay 100,000 for it, or you can pay 10, either is fine with us"? If it
doesn't weigh too much, ship it to the US, I'm sure there are more
customers here (I doubt I'll get much use from it, unless it runs
term and MS Word ;)
>How often do these come up for sale? A Cray, about 6 or 7 years old,
>apparntly, is being sold in Australia. They're asking $100,000, which
>puts it a tad out of my range. :) However, if it isn't sold it will be
>scrapped - I wonder if they will accept a couple of cartons of beer
over
>whatever the scrap offer is?
>
>Anyone want it? :)
>
>Adam.
>
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I pretty much knew it wouldn't work, but hoped that maybe it would
work just like a normal BIOS... anyway, does anyone have that circuit
cellar article? What is "inexpensive"?
>
>> I just downloaded the assembly source to a generic XT bios. It
compiles,
>> but I can't apparently run it from a command line, or boot off a
floppy
>> disk that has the thing rawritten on it.
>
>Um - what are you *expecting* it to do when you run it from the command
>line or from floppy disk?
>
>> Is there a way I COULD do it
>> without getting a ROM burner?
>
>Sure - there are adapters that let you put code into a small CMOS
static
>RAM with an adapter that fits on the ROM socket. One of Steve
Ciarcia's
>early Circuit Cellar articles in _BYTE_ shows how to do this. But if I
>were you I'd just build or buy an EPROM programmer - they're by no
means
>expensive.
>
>Tim.
>
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> I just downloaded the assembly source to a generic XT bios. It compiles,
> but I can't apparently run it from a command line, or boot off a floppy
> disk that has the thing rawritten on it.
A BIOS is linked to run at a preset address, usually F000 (64K Z80) or
F000:0000 (last 64KB segment on an 8086 in real mode). What I have done
when debugging a BIOS is to link it at a lower address (say, 8000:0000),
then load it into memory at that address with a debugger, set the CS segment
register to 8FFF (a true reset puts it at FFFF), then jump to 8FFF:0000
(simulating a reset to FFFF:0000). Since this is an XT I assume you will be
running in real mode, so address translation isn't a problem unless your
machine has some kind of additional address mapping logic.
Of course you can't run the debugger after that as the BIOS will trash all
your vectors. Be sure to modify the BIOS code to stop the memory sizing
test below segment 8000 or you will memory test right over your BIOS image.
Hope this helps, Jack Peacock
I just got an Apple ProFile hard drive. It seems to work, although I don't
have an interface card for it yet.
But, it squeaks. You know, like a water pump on a car before it blows
(that's the pump bearings, BTW). Does anyone have any check-out/maintenance
tips for this drive? The hard drive is labeled "Seagate model ST-506".
Thanks!
Rich Cini/WUGNET
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ClubWin! Charter Member (6)
MCP Windows 95/Windows Networking
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