Daniel Seagraves <root(a)bony.umtec.com> writes:
> Will it be unhappy with my if I plug all these 120 AC plugs (I found 3 so
> far, one for the fan at the base of the rack, one for the KS logic, and
> one for the UNIBUS box) into a normal powerstrip instead of DEC's?
> I don't have the proper plug for the end of the power controller, and this
> is what I do for my PDP-11s anyway.
Actually, you can _just_ get away with plugging it into a 15 amp
circuit if you unscrew the L5-30P and replace it with a 5-15. I used
to do that all the time... I was told by one person that the L5-30
was for mechanical reasons, not for electrical (L5-20 is kind of
wimpy).
---Rob
>From: Daniel Seagraves <root(a)bony.umtec.com>
>Will it be unhappy with my if I plug all these 120 AC plugs (I found 3 so
>far, one for the fan at the base of the rack, one for the KS logic, and
>one for the UNIBUS box) into a normal powerstrip instead of DEC's?
>I don't have the proper plug for the end of the power controller, and this
>is what I do for my PDP-11s anyway.
Shouldn't be a problem, but the 115V/30A twistlock outlets are available
>from Home Depot and probably any other place too. The HDs around here
changed suppliers a while ago, so their twistlocks went from about $12 to
about $20, still not too bad.
John Wilson
D Bit
>Date: 14 Nov 00 00:21:26 +0100
>From: "Iggy Drougge" <optimus(a)canit.se>
>Subject: 80186 Nimbus
>
>On the subject of whether the Research Machines 80186 based computer was
>called PC1 or Nimbus, I managed to dig out an old issue of Practical
Computing
>(March 1985) where the machine is reviewed.
>It is actually called RM Nimbus, but is available in two models - PC1 and
PC2.
>Thus, both parties were right.
>It features 3.5" floppy drives, an 8910 three-voice sound chip (Is this the
>same as the YM2149?) as well as an Oki digitised voice chip, and has
dedicated
>graphics chips which are quite speedy.
I took some pix of mine last night but my ISP was acting up so I couldn't
upload 'em. Mine is RM Nimbus PC1 and it has 2 cart slots on the front as
well as a bundle of ports on the back including colour AND mono monitors,
keyboard, mouse, RJ11 printer connector, RJ11 'aux' or 'piconet' connector,
Ethernet connector (BNC) and 4 or 5 expansion slots, one of which carried
the IO board.
Sound and voice you say? Hmmmm :) What OS did it run then? DOS or CP/M? More
importantly, has anyone got spare {whatever} disks?
>From: "Daniel A. Seagraves" <DSEAGRAV(a)toad.xkl.com>
>I got it from John Wilson, moved it 1000
>miles to home.
Just for the record: this KS10 and TU45 belonged to Gordon Greene, I was
only storing them for him, until he finally decided that if he hadn't powered
them on in the nine years since we retrieved them from Texas, it was never
going to happen.
Glad to hear you guys made it back OK, that was a pretty long round trip to
make in 2.5 days!
John Wilson
D Bit
-----Original Message-----
From: THETechnoid(a)home.com <THETechnoid(a)home.com>
>>How would user accounts be handled? Also most importantly is anyone
>>seriously interested in this?
There are two ways to do this, one is proxies to specific applications.
The other is a generic guest account that has limited permissions.
Of course you can do an account for every one that wants to use it.
Basically anything you do under unix or NT is reasonable for VMS
and striaght forward.
>I'm so green I don't know how to create other users at this point. I
can
>follow the networking so lemme' know and I'll implement it.
One of two ways, by hand in Authorize or some version of VMS
had a script (DCL) that woul build a basic account.
TASKS:
Create the directory for the user.
Create an account in Authorize with correct permissions
and passwords.
Provide a default login script, in the user account.
Consult HELP and and within Authorize HELP.
Allison
From: Eric J. Korpela <korpela(a)ellie.ssl.berkeley.edu>
>I for one would be interested in seeing whatever references to 8080
internals
>this kind of stuff comes from. The bulk of what I have doesn't give any
>internal details. I'd alway assumed that there was some sort of
>synchronization of writeback to the accumulator (or other destination
register)
>or the update of the flags that ate up the extra cycle.
On the 8080 you have cycles that are 3-6 clocks long and total
cycles(clocks).
IE: to fetch a 3byte operand like a LXI SP,1234 requires 3 CYCLES and
and an extra clock to put it in the SP. Still thats only 10 clocks.
an an ADD REG is only one cycle and 4 clocks, the address and staus out
eat two clocks with status availabile on the midpoint of the second
clock.
The remaining clocks, T3 is the instruction decode time and T4 is the
actual
operation.
For DAD (16bit add) 10 cycles breaks to the first 3 as setup and exectute
overhead and 6 (basically two 8bit adds) spread across thre cycles. The
second two cycles have one clock each of over head as the internal bus
is used to transfer status to the out side world (bus idle state).
>Given a 16 bit add takes 11 T cycles, that would be 2 for fetch and
decode,
not for the 8080, it's 10. For z80 it's 11.
>4 for ALU passes, and 5 for who knows what. Probably moving things too
and
>from internal registers, that would explain why a 16 bit increment could
be
>done in 6 T cycles, 2 fetch+4 ALU passes.
keep in mind the internal busses are few, so if status has to be moved to
to the TEMP for a bit test the bus takes a cycle. Z80 adds little
overheads
like refresh (ever wonder what bus is used to get R tot he low address
bus?).
Allison
Now you made me go and take off the cover! :-) I didn't dare to do so
at first, because of the limited space, but nothing got damaged and it
paid off. I found an extended warranty sticker that said 'Reading
Checkout XII.67', so your suggestion is correct! While the cover was
off I made some more pictures for the page.
http://home.iae.nl/users/pb0aia/cm/garage2.html
Kees
On 2000-11-26 classiccmp(a)classiccmp.org said to kees.stravers(a)iae.nl
>Certainly is a straight 8. Great find. Looks slightly hybrid.
>The front covers I believe are from the rack mounting version.
>However the bottom power supply section is in the same position as
>the desk top model.
>Any chance of getting the serial number? This might allow us to
>date it more precisely. I would suggest closer to '68 than '66
>from the ribbon interconnects at the back.
>Kevin
>-----Original Message-----
>kees.stravers(a)iae.nl
>Sent: 26 November 2000 01:49
>He also put a PDP-8 in my garage. It seems incredible, but I think
>this PDP-8 is an original one from the first series from the 1960's.
>I put up a few pictures at
>http://home.iae.nl/users/pb0aia/cm/garage2.html
>Could you experts look at them and verify that this really is a very
>old PDP8? I ask because I just can't believe it is one.
--
Kees Stravers - Geldrop, The Netherlands - kees.stravers(a)iae.nl
http://www.iae.nl/users/pb0aia/ My home page (old computers,music,photography)
http://www.vaxarchive.org/ Info on old DEC VAX computers
Net-Tamer V 1.08.1 - Registered
Kelly <KFergason(a)aol.com> said:
> What I would like to end up with is a list that looks like this:
> 128K Mac Original
FWIW and IMHO,
I really consider this two computers, the "Macintosh" and the
"Macintosh 128K", I have both. The "Macintosh" was introduced
in January 1984, the case was changed later that year (I believe
about the time the Macintosh 512K was introduced) to say
"Macintosh 128K".
If you want to add something truely unusual to your collection,
look for a "MacCharlie". Find one of these and then you'll really
have a fat Mac! http://www.mandrake.demon.co.uk/Apple/charlie.html
I still have not gotten around to trying to fire mine up.
If you want to get technical, get some copies of the old
MacTech/MacTutor magazines. (Started in December 1984, it was
MacTech for the first three issues then became MacTutor, now it's
MacTech again) I also have "The Complete MacTutor" and "The Best
of MacTutor".
They sell a 15 volume CD collection that includes the entire
archives of MacTech Magazine through June 1999 and volumes I-VI
of Inside Macintosh. http://www.mactech.com/cdrom/
Good luck in your searching,
--Doug
=========================================
Doug Coward
Press Start Inc.
Sunnyvale,CA
Curator
Analog Computer Museum and History Center
http://www.best.com/~dcoward/analog
=========================================
-----Original Message-----
From: Eric Smith <eric(a)brouhaha.com>
To: classiccmp(a)classiccmp.org <classiccmp(a)classiccmp.org>
Date: Friday, November 24, 2000 3:27 AM
Subject: Re: 80186 and now AMY chip
>"Eric J. Korpela" <korpela(a)ellie.ssl.berkeley.edu> wrote:
>> You missed the important one, and the only one that counts
>> when determining the bitness of the processor, the width of
>> the (integer) ALU.
>>
>> Clearly, regardless of the width of the registers and the
>> address bus size, the Z80 is an 8 bit processor, as is the
>> 6502. The 8088 and 8086 are both 16 bitters. The 68000 and
>> 68010 are 16 bitters. The 68020 is a 32 bitter as is the
>> x386.
>
>Actually, using this metric, the 8080 and Z-80 are 4-bit processors,
Where in the world did that come from? The base data paths for z80
and 8080 are 8bits. Key words are "data paths" as the alu on 8080
is basically 8bits (with microcoded 16 bit ops as two sequential 8bit
ops).
Usually the size of the data word is the metric. What confuses the
subject often is the instruction word size (4004 is really 8bit then)
or the ability to manipulate smaller than word size (VAX and pdp-11
byte ops).
>Try asking programmers what width processors are instead of hardware
>engineers. They'll tell you that the 8080 and Z-80 are 8-bitters,
>and that the 68000 and IBM 360 (most models) are 32-bitters.
generally agreed. It when you start playing with math ops and
addressing range that the "size" is noticeable and significant.
However if you look at most cpus there is a basic word size and
alu size that are amoung the defining parameters.
Allison
Hello, all:
Work progresses on the Altair32 emulator project. See the update on my Web
page:
http://highgate.comm.sfu.ca/~rcini/classiccmp/altairem.htm
Right now, I'm working on the virtual disk drives, and a friend of mine is
working on the virtual VDT terminal. No code is posted yet, but I hope to
have it nearly complete by the end of December.
Rich
Rich Cini
ClubWin! Group 1
Collector of Classic Computers
Web site: http://highgate.comm.sfu.ca/~rcini/classiccmp/
/*****************************************/
