Larry and Tony are discussing a blown capacitor...
>> I'd replace it. A 250V _AC_ capacitor, class X. You should be able to get
>> that from a good parts company (alas, being in another country I can't
>> help you there).
>>
>> Then try again. Put the PSU on dummy load if you like (I certainly would)
>> - a 6V 6W bulb on between the +5V output and the 0V pin. Let it run for a
>> few minutes - taking care not to touch the PSU board as there's mains and
>> rectified mains all over it. If it runs for (say) 5 minutes on dummy load
>> it's safe to try it in the computer again.
[...]
> You have referred before to this dummy load 6V 6W device. If my
> memory of Ohms law hasn't failed me completely this works out to
> a 1 amp limit. I also imagine this has to be on the power good line.
> Is there any reason you use this configuration ? I have some old 6V 6W
> bulbs . Would these work just as well ?
Eh? 6V 6W bulb is exactly what Tony suggested.
To be more specific, many power supplies have regulator circuits that
expect some current to be flowing in the load. These PSUs will push out
the wrong voltages, or shut down altogether, if you power them up with
nothing on the output.
Therefore, when testing power supplies, connect some sort of load device
- it doesn't matter what as long as it draws roughly the right amount of
current - to the output. Most computer PSUs regulate the voltage on the
5V rail and hope all the others will follow, so this is the best place
to connect the load.
Light bulbs make good dummy loads because (a) they light up when the
current is flowing and (b) they are relatively small, cheap and easy to
obtain compared with (say) resistors of similar value.
12V bulbs (e.g. car running lamp (0.3 A) or indicator lamp (1.75 A)) are
good for loading 12V lines should you need it.
6V bulbs are good for loading 5V lines. 6V 6W flashlight bulb is good
for small and medium PSUs; for larger power supplies I use a 6V 24W car
headlamp bulb (yes, my truck has 6V electrics). 12V bulbs also work at
5V, but remeber they have a much lower resistance at 5V than they do at
12.
DON'T use the "power good" line to connect the dummy load. This is a
digital output - usually TTL level - which can only drive a few mA.
DO connect the "voltage sense" line(s) to the load as well as +5V and
ground.
Philip.
On 4 Sep 98 at 1:24, Sam Ismail wrote:
> This guy was a mega turd. Although his FAQ was good, and his amazingly
> peurile action of obliterating the FAQ over his personal holy war against
> perceived or actual piracy of mostly obsolete software was indeed bizarre,
> there are plenty of replacement FAQs available to help out the novice.
The "new" FAQs can be downloaded from the Ground FTP server at
ground.ecn.uiowa.edu
> This debate is being perpetuated by people who have absolutely no life
> whatsoever. I engaged in that debate for a few weeks and then went on
> with my life. This was 2 years ago, AND THIS DEBATE IS STILL RAGING!
Things have improved on the csa2 newsgroup following NM's departure.
You forgot to mention his trademark "read the FAQ, stupid" response to
every naive question. As you said, definitely a group for the
sociologists to enjoy in years to come on Dejanews...
Phil
**************************************************************
Phil Beesley -- Computer Officer -- Distributed Systems Suppport
University of Leicester
Tel (0)116 252-2231
E-Mail pb14(a)le.ac.uk
Problem has apparently been solved by re-seating the 286 chip and putting
silicon grease between the chip and the heatsink. It has been going now for
several hours.
Thanks anyway, folks.
Cheers
Charlie Fox
On 03 Sep 1998 18:16:16 -0700, Frank McConnell <fmc(a)reanimators.org> wrote:
> One of my other projects is tracing-down IMSAI intellectual property.
> IMS sold out to Fischer-Freitas Corp. some time around 1979. My attorneys
> are looking into this now; we're retrieving the court docket from the
> bankruptcy court in Southern California.
>>Heh. Have you read _Once Upon a Time in ComputerLand_ by Jonathan
>>Littman (I think)? If not, you should.
I'll try to locate a copy. This is all part of learning about a
particular computer line...I was about 11 at the time, so my focus was on
playing in the park, not computers.
Thanks for the input.
Rich Cini/WUGNET <nospam_rcini(a)msn.com>
- ClubWin/CW7
- MCP Windows 95/Windows Networking
- Preserver of "classic" computers
<<<< ========== reply separator ========== >>>>>
Just received a pair of 3100e/40's. One seems ok, the other will boot ok
but after about four minutes the screen will freeze and the keyboard will
become completely inoperative.
Turning it off and on results in three or four bright vertical lines on
the screen and no other activity. Turning it off for twenty minutes or so
results in it booting up normally as above.
Does anyone have any suggestions as to where to start?
Regards
Charlie Fox
yea, i have an old compute! magazine that had a write-up about him. his game
was some strategy scenario with the us<->ussr or something like that. he was
talking about the future of gaming.
In a message dated 9/3/98 7:45:44 PM Eastern Daylight Time,
sinasohn(a)ricochet.net writes:
> Speaking of characters, btw, anyone know what ever happened to Chris
> Crawford? He wrote some really popular game for the Atari 8-bit computers,
> then went on to develop a hit game for the Mac (something about running the
> world or something? Sorry, I was never really into games.) He was another
> neat person. A physicist turned programmer
"Richard A. Cini, Jr." <rcini(a)email.msn.com> wrote:
> One of my other projects is tracing-down IMSAI intellectual property.
> IMS sold out to Fischer-Freitas Corp. some time around 1979. My attorneys
> are looking into this now; we're retrieving the court docket from the
> bankruptcy court in Southern California.
Heh. Have you read _Once Upon a Time in ComputerLand_ by Jonathan
Littman (I think)? If not, you should.
At one point (before 1979) Bill Millard was pursuing an
income-sheltering scheme that involved selling IMS to a
south-of-the-border company that would liquidate it, then sell its
intellectual property to yet another company located on the Isle of
Jersey. Said third company would license the intellectual property
back to IMSAI Manufacturing Corp. which would make and sell computers.
IMSAI Manufacturing Corp. would pay a licensing fee; the third company
would pay Millard royalties.
I gathered this was never really completed, but Millard ended up going
to some effort in an attempt to put things back the way they were,
un-incorporating the old IMS Associates Inc. and IMSAI Manufacturing
Corp. to release the names, and incorporating new ones of each. Also
I thought that it was IMSAI Manufacturing Corp. that filed for
bankruptcy and presumably sold its assets to Fischer-Freitas. IMS
Associates was (I think) still the parent of both IMSAI Manufacturing
Corp. and ComputerLand.
Or maybe I don't understand it at all, IANAL. If you'd like to
explain it to me I'd appreciate it.
-Frank McConnell
Hans:
>>Did you talk to them ? Their website (http://www.gmtme.com/index.html)
>>presents only a few new products - noting of the old stuff.
No, I did not. I got the impression that the intellectual property
associated with the old MOS stuff remained with the bankruptcy estate. GMT
only purchased certain inventory on hand (probably wafers, etching
chemicals, etc.)
> The non-CSG assets stayed with Escom until they filed for receivership
> (bankruptcy), in 1996. The assets were then sold to a Netherlands-based
> company (Commodore NL??), who then sold the Amiga assets to Gateway (the
> Holstein cow people). I don't think that anyone truly knows who owns the
old
> 8-bit assets. Commodore NL sells PeeCee compatible machines under the
> Commodore name, so I'd bank on Gateway owning them. If anyone on this list
> knows anyone at Gateway, now may be the time to use the relationship.
>>I think this is a formidable example for all our old (pre 1980) toys -
Almost all of the small (and >>even some of the big)
manufactiurers/designers have vanished. So who owns the design,
>>the ROM code, the spechial chip designs, the manuals and any other soft ?
One of my other projects is tracing-down IMSAI intellectual property.
IMS sold out to Fischer-Freitas Corp. some time around 1979. My attorneys
are looking into this now; we're retrieving the court docket from the
bankruptcy court in Southern California.
Rich Cini/WUGNET <nospam_rcini(a)msn.com>
- ClubWin/CW7
- MCP Windows 95/Windows Networking
- Preserver of "classic" computers
<<<< ========== reply separator ========== >>>>>
Thanks to the advice on restoring my rained-on Osborne 1 (especially from
Tony Duell - thanks Tony), it is now up and running, and asking for a boot
disk, which of course I haven't got.
Is there any way to create a boot disk from an image, and if so where can I
find such an image? I'm pretty sure my Osborne has a double-density
controller (it is the blue version, and the floppy drives appear to be
plugged into a daughterboard).
I addition to a PC with a 360K floppy drive, I have a copy of Sybex's
22disk and a copy of a much earlier program called ALIEN.COM, both of which
can read and write CP/M disks in a variety of formats. (BTW, does anyone
have a version of ALIEN.COM later than 1.0Fj?)
I also have a Commodore 128D, plus external 1571 and 1581 drives, and I've
found a CP/M program called Jugg'ler-128, which is supposed to allow
reading and writing of around 140 different CP/M formats (including, it
seems, Osborne 1 single-density).
So given these resources, is it possible for me to create an Osborne 1 boot
disk? I understand that I can get one (for a small fee) from the Dina-SIG
CP/M System Disk Archives via Don Maslin, but this involves getting the
disk shipped halfway around the world, not to mention the added
complication of getting a few Australian dollars converted into (even
fewer) US dollars.
Also, is it possible to get images of the other disks that originally came
with the Osborne 1 (Wordstar et al)? Are there any licensing issues with
this? I would have thought that, since the programs came with the machine
originally, owning the machine would imply having a license, but I'm sure
things are more complicated than that.
Thanks in advance.
| Scott McLauchlan |E-Mail: scott(a)cts.canberra.edu.au |
| Network Services Team |Phone : +61 2 6201 5544 (Ext.5544)|
| Client Services Division |Post : University of Canberra, |
| University of Canberra, AUSTRALIA | ACT, 2601, AUSTRALIA. |
