Found a Micro Genius IQ-501 Computer Game console and one
controller/joystick for it at a thrift. It's a NES/Famicom Pirate Clone.
You can see it a this site page down to the bottom:
http://www.gamersgraveyard.com/repository/nes/pirate/pirate-clones-A-M.html
Also got a couple books in from Amazon; the one called High Score! the
illustrated history of electronic games is a good source of info and
pictures of old consoles. The other book called "the ULTIMATE History of
Video Games" I have not started yet.
My copy of Collectible Microcomputers came by mail today and I hope to start
reading it soon.
I've been looking for a replacement uA79MG negative voltage regulator for
awhile, but so far haven't been able to find one. It is for a custom power
supply for an embedded system made in the early 1980s. Fairchild's part
number for the device is uA79MGU1C, which they call a 'Power Watt'
package. It actually looks like a TO-220, but has 4 leads. The regulator
bolts to a heat sink on the supply's board.
I need at least one of these parts, but could use a spare or two if
someone has a bunch hiding away in their parts cabinet. I could also use a
couple spare uA78MG (uA78MGU1C) regulators too, but they would just be put
away as spares for these power supplies.
-Toth
From the its been way too long to remember department...
I just put an old HP SCSI 9-track tape drive on my 4000/400 running
Vax/VMS 5.2... Does VMS probe SCSI devices at boot time? Is there a
way to access this drive without re-generating the system..?
David
------------------------------------------------------------------------
-
David HM Spector spector(a)zeitgeist.com
software architecture - network/security consultation
technical due diligence - technology planning/analysis
Office:(631)261-5013 Cell: (631)431-5756
Hi,
I'm rather new inhere.
I've got into my garage an IBM 5120 machine with his printer and an external
diskette unit with 8 inch flops.
I've got also all documentation and technical documentation of it together
with all operation disks.
It's running on APL (A Program Language) and it is working.
Does someone know if this is a machine that is worth something?
Please advise... it's rather huge and heavy and it is standing now in my
garage which is rather moisty and cold..., mayby I have to move it somewhere
else if it's worth it...
Michel Wouters
I found this thread from 4 years ago. I'll give it a try...
http://www.classiccmp.org/mail-archive/classiccmp/1998-09/0953.html
>From: "R. D. Davis" <rdd(a)rddavis.org>
>Reply-To: cctalk(a)classiccmp.org
>To: cctalk(a)classiccmp.org
>Subject: Re: PDP11/44 update, dead wierd fan (35VAC, 75Hz)
>Date: Wed, 18 Dec 2002 22:06:28 -0500
>
>What you don't need is a replacement fan. :-) I had a similar problem
>when I got my 11/44 several years ago; Tony Duell kindly instructed me
>on the _proper_ way to solve this problem.
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I seem to remember that eather "radio electronics" or
"rainbow" magazine had an article on how to build a
computer audio tape conditioner.
it was for the coco.
On Tuesday 17 December 2002 9:50 pm, tim lindner
wrote:
> I am looking for information regarding how various
computers wrote
> information to audio tapes.
>
> For example, the Tandy Color Computer wrote ones and
zeros to audio
tape
> in the following format:
>
> 'one bit': one sinusoidal cycle @ 2400 Hertz.
> 'zero bit': one sinusoidal cycle @ 1200 Hertz.
>
> The bit rate is variable on a CoCo tape. But
averages to about 1500
bits
> per second.
>
> I am contemplating creating an audio tape anaylzer
to help me recover
> some data. I would like to make the program useful
to thoes outside
the
> Color Computer community. But first I need to
understand all of the
> different methods used to put data on audio tape.
--__--__--
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Chris,
are you talking about the sys/32?
i have never heard of the sys/23.
i do have some sys/32 disks - not the ones you
mentioned, though.
i still have the manuals (tech binders) with the
schematics and trouble shooting stuff and i may have
the sys/32 ssp and a few other disks around here
somewhere.
i still have two sys 34's and one sys/36 in my
collection - one of the 34's and the 36 are rare
config's - they both have extended chassi's and extra
hard (disk) drives in them.
the 34 has 2 hd's and the 36 has three hd's.
it's really interesting that the 34 has 8 inches of
chassi added to it and the 36 has three feet of chassi
added to it.
i do have alot of sys/36 software and some sys/34
software.
if you do have a sys/32 - you can have the manuals and
software - just arrange shipping.
i no longer have a sys/32 and no longer need the
stuff.
Bill (n8uhn at yahoo dot com)
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In a message dated 12/18/2002 7:53:39 PM Eastern Standard Time,
cisin(a)xenosoft.com writes:
<< > > And it's usually NOT a good idea to put your LAST boot disk into the
> > drive! Although normally not a problem with most "normal" drives, there
> > have been SOME (most notably Apple ][) that were capable of malfuntioning
> > in ways that would cause them to erase/wipe/damage/ diskettes even when
> > write-protected!
> > What an amazing feature!
On Wed, 18 Dec 2002, Tony Duell wrote:
> _Any_ drive if malfucntioning could have write-gate stuck on and also
> ignore the write protect line. After all, those signals are combined in
> the logic circuitry somehow, and those gates could malfunction.
Ooops!
I meant to say that on the Apple ][ a malfunctiong disk controller could
override write protect, even on a non-malfunctioning drive. THAT is the
special unique feature.
>>
I had that happen once! Ruined a number of my floppies until I finally
figured it out. Bought one from Jameco for either $50 or $80 way back in the
late 1980s.
--
Antique Computer Virtual Museum
www.nothingtodo.org
>I am trying to identify various computers that have had their ports
>situated in the front of the chassis as opposed to the back.
>
>The Atari 800 would be one example (game ports in the front). Are there
>any other examples anyone can think of, especially where peripheral (disk,
>printer) or perhaps network ports are concerned?
Didn't the IBM PCjr have two aux sockets on the front for game cartridges
and I thought there was a printer interface that could use those sockets,
and a floppy drive interface as well (could be wrong).
And of course Mac's up to the Mac Plus have the keyboard port in the
front, as well as I have seen some old PC clones like that (but I suspect
that isn't exactly what you are looking for).
-chris
<http://www.mythtech.net>
Hi all,
I've finally found the glitch in my Jupiter Ace. When the power supply
was momentarily reversed (and applied to the I/O port), the CPU (a NEC
D780C) and one of the RAMs (NatSemi MM2114) packed up. After replacing the
CPU with a spare (OK, I pinched it out of a Toshiba HX-10 MSX), I've managed
to perform a bit of testing. With the CPU out, everything looked good. When
I powered up and probed all the data and I/O lines, D7 was locked to 0V and
D6 was sitting at around 2.5V. Obviously, something was overloading the
Z80's data bus, causing it to overheat significantly. After removing the RAM
(and nearly pulling up four pads), the Z80 seems to be running fine. RFSH is
pulsing, as are M1 and CLK. The data and address lines look OK on my scope,
too.
So, it looks like the Z80 bit the dust when the PSU touched the I/O
port, then it proceeded to dump 9V into D6 and D7. After that, it let out
the magic smoke. Thankfully both ROMs (TMS2532s - TI's clone of the 2732)
seem to be OK.
The only "interesting" thing is that the current draw is around 500mA
with everything except one of the RAMs and the CPU fitted. With the CPU (a
Sharp LH0080A) fitted, the current consumption rises to approx. 620mA. Can
someone with a working Ace please check the current consumption of their
unit for me?
Later.
--
Phil.
philpem(a)dsl.pipex.com
http://www.philpem.dsl.pipex.com/
