> Hi folks,
Hi folks too! It's over four months since I was last on Classiccmp, and I
almost feel I need a delurk!
> I recently stumbled across a Commodore 16 power supply. I'd like to keep it
> on hand as a spare. But I'm a little worried. The output is specified as
> 9.5VDC, but when I measured with my DMM, I got 14VDC! I didn't know if it
> needs a load to bring it down, or if the PS is just shot.
>
> Any thoughts?
My thoughts:
These beasts use 5V for the logic, and somewhere around 9V (not critical) for
tape motors and things.
A 9.5V power supply is bound to be unregulated (why regulate it to a voltage
that's not critical when all you're going to do is regulate it again to the
voltage that is). Recent threads have pointed out Commie machines of that date
with regulators on the board. And finally, the two voltages in the PET (the
Commie with which I'm familiar) are 5V (regulated) and 9V (unregulated) (FWIW,
the PET 8296D just took 5V and 12V from a SMPSU, but that was a special case -
an internal disk drive wanted 12V fairly well regulated for motors)
So I am 99.99% certain that it just needs a load to bring it down.
To test it, the easiest load to use is an auto bulb. A stop lamp / indicator
bulb is rated about 2A at 12V (well, 21W is 1.75A). Stick that on the output -
the bulb should survive if it remains up at 14V, but I expect you'll see it come
down to about 10V.
Just my 2d worth.
Philip.
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Hi folks,
I recently stumbled across a Commodore 16 power supply. I'd like to keep it
on hand as a spare. But I'm a little worried. The output is specified as
9.5VDC, but when I measured with my DMM, I got 14VDC! I didn't know if it
needs a load to bring it down, or if the PS is just shot.
Any thoughts?
- Earl
Found an HP85 and HP9825, both in working order, except presumably for
the tape drives. The latter is an HP9285A with the full-travel keyboard,
and a full set of ROMs: string/adv. programming; 9872A plotter / general
i/o; matrix; and 9885 disk. No interfaces though; I went back to the
du^H^Hstore to look, but they were nowhere to be found. Question: Are the
interfaces the same as those used on the HP9845?
Elsewhere, (perhaps slightly off-topic), bought a Litton/Monroe 1655
programmable desktop calculator (with nixie-tube display). Cracked case
and a couple of missing keys; haven't powered it on yet.
Also got a 6800 evaluation board, MEK6800D2, with hex keypad & LED display.
--
Kevin Schoedel
schoedel(a)kw.igs.net
Hello,
I was given this monitor at the Springfield hamfest. According to the back
panel it is an analog RGB with a DB9 female input. Does anyone out there
have a pinout on that plug, or shall I attempt to contact Sony on this one??
I am presuming that it is NTSC/CGA scan frequencies.
Kind regards
--
Gary Hildebrand
Box 6184
St. Joseph, MO 64506-0184
816-662-2612
or
ghldbrd(a)ccp.com
John didst scribe:
> First got a call from a gentleman in Ohio that he had a model 4 TRS 80
> he wanted to give me along with some other items after he read the
> article about me collecting in his local paper there. The machine and
> other items were here MN with his son. After phone contact
> with the son
How did you manage to get in the local paper? That's a great form of
advertising....
Things I picked up this weekend:
Adman Grandstand 5000 Pong, boxed
Adman Grandstand SD070 cart pong, boxed
Adman Grandstand VEC (aka Fairchild Channel F II), boxed
Micro Genius IQ501 (Super Famicom clone), boxed
2 boxed Atari 2600jrs, with a shedload of games
Boxed Grandstand Astro Wars tabletop
half a dozen Vic-20 carts
Issue 2 Spectrum in DK'Tronics keyboard enclosure
Not bad for ukp25!
>the HSC sign...
>
>HSC, off the central expressway, no idea how I got to >it. Very much like
>the first two places, too tidy, too >retail. This isn't really that bad, I
>mean if I lived in >the area and needed something between swapmeet times I
>just might head over to one of these places to get that >needed item, but
>nothing got me excited during the >visit. Some prices were comically high,
>but some were OK >if you needed the item. Big collection of data books to
> >read with free coffee over in the corner too.
Yeah, I know what you mean. I recently took a trip to a used computer place
in Witchita that wanted *way* too much for their stuff ($65 for a
refurbished Apple/Conner 2.5" 60 Mb SCSI hard drive? I could probably find
one for $6, just for the cost of shipping)
>General trip notes, WOW have prices gone up. Gas was >$2.19/gal, which is
>about $0.40 higher than Orange, CA, >food prices were also higher, even in
>supermarkets on >some items (bottled water, but not soda). Rooms were
>outrageous, we paid $300/night staying at the Holiday >Inn Crowne Plaza
>(very nice, but an older work in >progress), and MUCH worse a rathole
>(beatup old >motel/apt on its first leg of fix up) on the east side >of San
>Jose called the Whitehouse Inn was $102 when a >page at 7PM forced us to
>stay Thursday night. Much >better rooms at slightly better prices were
>available >earlier in the day, but by 6PM they were gone.
I hate to make you jealous or anything, but here in Texas it's right about
at $1.35-$1.45 for cheap grade gas.
Also, If you are ever in that area again, look for a hotel chain called
MicroTel, (No, this is not a company that made computer modems in the 80's!)
you will be surprised at how much you have to pay, as well as the
facilities.
____________________________________________________________
David Vohs, Digital Archaeologist & Computer Historian.
Home page: http://www.geocities.com/netsurfer_x1/
Computer Collection:
"Triumph": Commodore 64C, 1802, 1541, FSD-1, GeoRAM 512, MPS-801.
"Leela": Macintosh 128 (Plus upgrade), Nova SCSI HDD, Imagewriter II.
"Delorean": TI-99/4A, TI Speech Synthesizer.
"Monolith": Apple Macintosh Portable.
"Spectrum": Tandy Color Computer 3, Disto 512K RAM board.
"Boombox": Sharp PC-7000.
____________________________________________________________
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Get Your Private, Free E-mail from MSN Hotmail at http://www.hotmail.com
In a message dated Mon, 7 Aug 2000 2:19:10 PM Eastern Daylight Time, "Richard Erlacher" <richard(a)idcomm.com> writes:
> While there seems to be a fair amount of information about the older apples,
> i.e. ][, ][+, and the IIc+, I've been unable to find any menaingful
> information on the web about the plain-old IIc. It has an external
> connector to a floppy disk drive, but I've found no information about the
> drive itself. The IIc+ has an external "intelligent" drive, and I'd like to
> know what that means, in this case, not to mention that I'd like to know
> about the "intelligent" hard disk that attaches to the IIc+ via that same
> connector, though perhaps not using the same protocol.
>
> There's also little definitive information about the memory usage for I/O
> and how (and how closely) they emulated the ][+ slot usage. They've
> apparently memory mapped the keyboard, so I would also like to know where in
> the memory map the keyboard lives.
>
> I'm considering cutting a hole in the side of the box to accomodate some
> sort of I/O channel. I understand that there was an expander available from
> a third party, but have little information about that. The slot I'd make in
> the box would accomodate a 40-pin, or perhaps 50-pin inline cable connector.
> Since I'd prefer to make an internally buffered I/O channel as opposed,
> simply, to bringing out the CPU's signals, it would be useful to have some
> information.
>
> Any suggestions?
>
> Dick
>
sounds like what you really want is a laser128. it's 99% apple compatible (the 1% was the apple version of aol which wouldnt connect right) and it also has an i/o connector on the left side which is really just a regular old slot mapped to slot5 IIRC. I ran a disk ][ controller off there for a total of 3 drives. any other card *should* work in the slot also.
I'm full of questions this morning :)
Speaking of external floppies, can I use a Mac 800K external on the ][GS? I
really want to get it running this week if I get the chance, but its
driveless ATM.
a
> -----Original Message-----
> From: Richard Erlacher [mailto:richard@idcomm.com]
> Sent: 06 August 2000 21:21
> To: classiccmp(a)classiccmp.org
> Subject: Re: Apple II FAQ
>
>
> Does anybody have specifics on the data format/modulation
> used on the Apple
> IIc external disk drive port? I read that the IIc+ uses an
> intelligent
> drive and that suggests that the data appearing on the
> interface may not be
> in the usual APPLE-II GCR format. Of course, the IIc+ may
> have yet another
> protocol, so the spec's from the IIc+ may not be what I need.
>
