Date: Wed, 16 May 2018 20:40:04 -0700 (PDT)
From: Fred Cisin <cisin at xenosoft.com>
>I remember an interview with Lee Felsenstein, in which he was asked how
>much a battery power unit for the upcoming Osborne would weigh. He
>reponded that the external DC connection was currently for use with a car.
>(Lee was driving a Honda Accord).
Sorry for the late reply, but I was travelling and needed to dig out the unit.
The lead-acid battery for the Osborne Powr-Pak(tm) I own weighs 3.59 kg.
> From: Randy Dawson
> For a while I have collected bits of legacy CAD
> My question is, did any of the source code for these systems
> .. ever make it out
Well, not quite what you're asking about, I think (it sounds like you're
interested in MechE CAD, not EE, even though SPICE was mentioned), but the
original Stanford SUDS is still available, I think.
> I know we are primarily a hardware group here, but where is the
> interest in the software discussed?
Is that a plaint ('how come we don't do software'), or a query ('where is
software discussed')? If the latter, it tends to be system specific, from
what I've seen - e.g. there's 'TUHS' for Unix, "its-hackers" for ITS, etc.
> From: Bob Smith
> 8110 for MOS memory, and 8120 for bipolar memory is what field guyde
> list says.
Well, the early bipolar MS11-C (1K boards) used the M8110 during early
production (see e.g. DEC-11-HMSAA-D-D, pg. 1-1), and apparently then switched
over to the M8120. I've only seen the later MS11-A bipolar (4K boards - dunno
why it's in reverse alpha order) associated with the M8120.
> I think the there was some change from special select parts and a move
> to schottky 74S series around the time of the 45/50 days.
I wondered that, but the MS11-C and MS11-A are the same speed (300 nsec);
although maybe the M8110 was a bit marginal, and component changes in the
M8120 made it more robust?
I guess I'll have to do it the hard way, and compare the ICs... :-(
> 11/40 was faster than 11/35, but if you changed a wire, they were the
I've heard of other manufacturers doing that, but I thought the /35 and /40
were identical, except for the number on the console inlay, and the sales
Fred Cisin <cisin at xenosoft.com> wrote:
> d) The TRULY IMPORTANT issues will never be solved through the use of
> armed forces:
> big-endian V little-endian
> vi v emacs
> DEC V IBM
> CDC V IBM
> TRS80 V Apple
> Atari V Commodore
> IBM V Apple
> Android V IOS
> Linux V Windoze V MacOS
> number of buttons on a mouse
On the other hand, the fight against the X86 architecture might be done
with the help of arm forces...
( *.* )
> ^ <
I started to revive an old Micro PDP11/83 I have for over 12 years
now. It is fully assembled and last time I tried to start the
machine it some kind of started.
My biggest issue at the moment is the power supply.
After the machine is running for a while, let's say 10 minutes and
then when I poweroff, the power supply starts producing a lot of
dense smoke. The smell is very penetrant.
What can I do with the power supply? Do I need to exchange it
completely or just parts of it?
At the moment I removed it from the case like described here:
Thanks in advance for any starting hints,
A friend of mine got a aox double time 16 board into a mac SE
Unfortunately it isn't working (not accelerating the mac) and we're unable
to find any info on it
Any helpers? :o)