On Wed, 31 Jul 2013, Martin Peters wrote:
Is there s/o owning a 16kb variant of the 5150 or s/o
who's seen it in
I used one for 18 years. It is in the shed in my back yard.
The first motherboard of the 5150 is often referred to
the 16/64kb board.
Was the 16kb variant of the 5150 without the
probably a configuration never released or was ist only very uncommon?
Absolutely released, and not VERY uncommon.
HOWEVER, if somebody went into Computerland (IBM had few, if any, of their
own stores for a few years), Computerland would vigorously attempt to
upsell a full system. "We would have to ORDER it, because we're out of
stock of those, but you could GO HOME TODAY! with a complete machine for
only $3000" (No different from the $7000 extra that Toyota dealer wanted
when I bought my Prius Station Wagon)
When it first came out, you would need to also buy a video card, FDC,
Serial (RS232 and 20mA), parallel printer, and joystick card from IBM to
build a complete system. But not necessarily in the same transaction.
It was more than 6 months before aftermarket existed.
I ordered in August 1981; it took quite a few months.
The college bought a couple dozen, to replace the PDP (long story of lies
and shenanigans). We were teaching FORTRAN, COBOL, Mainframe (360?/4381
through RJE). He was competent, and a force to be reckoned with in the
college. He bought bare 5150s, and we came in on a weekend to populate
them with 3rd party RAM, drives, and monitors.
And if it was released: was it officially shiped to
No idea. probably not.
Please do not refer to wikipedia or collector sites
only stating it
exists. I know that it is often mentioned, but I couldn't find any
pictures. I think this variant exists, but there are so many myth on
historic computer hardware out there.
It LOOKS the same as the 64K/256K 5150 motherboard. It takes a few
seconds of looking to find the identifying features (silk-screened
"16K/64K", presence of 16K chips).
YES, it did have a cassette port (which worked with the TRS80 model 1
MANY of the early ones had a black power supply. (63W?)
SOME of the early ones had a white, narrower power switch.
SOME of the early ones had an extra cutout on the back panel for a DB
connector. (Only an idiot would now ask "which size DB?")
My first 5150 is in my shed, and hasn't been turned on for 12 years. I
think that it still has the IBM CGA, but it now has an aftermarket FDC
(for 8"), 2 360K SA455's, a 730K 5.25", and I don't remember which 4th
drive it had in it when I put it away. It got frequent hardware changes.
It had a rough, but not abusive life. The machine NEXT to it got a
smashed case when bookcases came down in Loma Prieta (I had a dozen
machines setup in that office, and lots of tall industrial bookcases)
It is NOT "FREE if Picked Up In Berkeley" Yet.
How much is bid?
Grumpy Ol' Fred cisin at xenosoft.com