Well today I was able to go and pick up the SOL-20 that I had arranged for.
It included a bunch of interesting stuff, including the original manuals
and Panasonic TV monitor and cassette recorder. Also part of the package
are the following:
- MCS6500 Microcomputer Family Hardware Manual, August 1975
- A Guided Tour of Computer Programming in BASIC, (c) 1973
- Processor Technology Extended Cassette BASIC, p/n 727019
It would appear that this particular system was purchased at either
'Recreational Computer Centers' in Sunnyvale, CA or 'The Byte Shop' in
Santa Clara, CA in late 1977.
Jeff
------------------------------------------------------------------------------
Power Computing PowerCurve, 288mhz G3, Mac OS 9
http://www.geocities.com/siliconvalley/lakes/6757
Home Of The TRS-80 Model 2000 FAQ
From: Eric Smith <eric(a)brouhaha.com>
>According to its designers, the ALU on the 8080 is 4 bits wide, and
>takes 2 cycles for an 8-bit add or subtract. Presumably it takes at
>least 4 cycles for a 16-bit add or subtract. The 8080 takes so many
>cycles for *anything* that it's not obvious what it does internally on
>any given cycle.
It's not. It's 8bit. the cycles are wastes on delivering status and
fetching operands. You do multiple ops for 16bit adds/subs.
What makes the 8080/z80 interesting is the acc has a intermediate
carry for BCD ops.
Allison
How many eight-bit micros are there with TCP/IP implementations?
I can only think of the C64 and the MSX.
For the C64, there are AFAIK two implementations. One is a "normal" C64
program, with some clients for telnet, IRC and FTP, IIRC. The other one is a
UNIX look-a-like called Lunix, which will een handle ingoing telnet calls on a
slip line.
I believe both are available at
http://www.heilbronn.netsurf.de/~dallmann/c64.html
As for the MSX, the one implementation I know of is UZIX, which is about as
close to an eight-bit UNIX you can get. Its homepage is available at
http://www.dcc.unicamp.br/~adrcunha/uzix
I've heard some talk about a TCP/IP project for the Spectrum, as well.
Then there is the Ethernet card for the Apple II. Which protocols does it
support?
--
En ligne avec Thor 2.6.
Amiga: (noun) The most technologically advanced computer that hardly anyone
cares about.
Use in sentence: "I wanted to buy an Amiga for its low price and great color
graphics, but everyone else seems to be using IBMs or Macintoshes. So, to
remain compatible with the rest of the world, I spent three times as much on a
Macintosh and got only half the graphics capability of an Amiga."
Fellow collectors,
I am sending this message in the hope that some kind souls can help save
at least parts of an attic-full of classic computers.
The story is as follows: Several years ago, a computer company in
Gothenburg, Sweden, bought the entire stock of the former Swedish Sord
distributor (Sord was one of Japan's major PC manufacturers during the
80's). The contents of their warehouse were soon moved to an attic where
it has been collecting dust until today.
Now word reaches me that this company is in the process of moving and that
if nothing is done quickly, the entire attic-full of computers may be
thrown away. Trashed. Destroyed.
I once made a partial inventory of the attic in question and it contains
some 25 more or less complete Sord systems, plus a bunch of diskless PC
workstations, plus printers, monitors, disks, keyboards, various spare
parts and more software than a strong man can carry.
They may decide to keep a few complete systems for historical reasons, but
most will be lost unless something can be done. In fact, it may already be
too late as I write this.
If you live in northern Europe and if you want one or more of these
systems and if you can drive a car to Gothenburg within the very near
future then contact me as soon as possible. I have some close contacts at
the company and will make sure that you get in touch.
If there are any questions, I am of course willing to answer them as best
I am able.
/Fredrik Ekman
PS. Please forward this to ayone you think might be interested.
On Nov 24, 18:34, Richard Erlacher wrote:
> Does the '422 standard specify handshaking? Can you provide a reference,
> or, better yet, a URL?
Well, the standards document would be the definitive reference, but I only
have extracts and references in books.
--
Pete Peter Turnbull
Network Manager
Dept. of Computer Science
University of York
Hey folks,
Those of you who know HP3k gear, could you be so kind please contact Mr. Muller
to assist? The 3000's are not in my range of knowledge at all, just some
9000/300's and the good ol' ancient HP250 machine. Must be how he found me.
Wonder if he found one of you HP gurus thru the same "web" search?
Please contact him directly as he's not on the list.
Thanks much for your help!
Regards, Chris
-- --
>
> >From mailnull Mon Nov 20 14:20:14 2000
> Reply-To: <chris.muller(a)mullermedia.com>
> From: "Chris Muller" <chris.muller(a)mullermedia.com>
> To: "'gcfandt(a)netsyngcg.net'" <cfandt(a)netsync.net>
> Subject: HP 3000???
> Date: Mon, 20 Nov 2000 14:21:47 -0500
> X-Mailer: Microsoft Outlook CWS, Build 9.0.2416 (9.0.2910.0)
> Importance: Normal
>
> Hi,
>
> Saw your name on the web in connection with HP. I'm looking for information
> on the organization of backup tapes created on an HP 3000. (We write PC
> programs to read minicomputer tapes, and want to do one for the HP3k). Thanks
> for any help you can give us.
>
> Regards,
>
> Chris Muller
> Muller Media Conversions
> <http://www.mullermedia.com/>http://www.mullermedia.com
> 212-344-0474
>
Christian Fandt, Electronic/Electrical Historian
Jamestown, NY USA cfandt(a)netsync.net
Member of Antique Wireless Association
URL: http://www.antiquewireless.org/
On Nov 24, 23:25, Tony Duell wrote:
> >
> > > I'm trying to think of any interface on the Mac that is in any sense
> > > 'standard'. And no, I can't think of one...
> >
> > Their serial and printer ports are rs232 ports. their USB is entirely
normal.
>
> The serial ports on any Mac that I've seen are not RS232. They have
> differential data lines for one thing. And I believe that the RS232
> standard specifies a DB25 connector. The Mac serial ports are closer to
> RS422 than anything, but they're not strictly RS422 ports either.
Indeed. Wrong handshaking for RS422. And their DB25 SCSI isn't the same
as the original PC version, and does not meet the spec laid out in the SCSI
standard, so their SCSI is hardly a standard either.
--
Pete Peter Turnbull
Network Manager
Dept. of Computer Science
University of York
On Nov 24, 13:40, Paul Williams wrote:
> John Honniball wrote:
> > On Thu, 23 Nov 2000 18:47:12 +0000 (GMT) Tony Duell wrote:
> > >
> > > A 380Z _is_ a pile of boards and a case :-). Well, OK, there's a
> > > PSU and maybe a couple of drives as well.
> >
> > Quite right! My machine is missing the drives, wiring
> > loom, front panel, card cage and connectors.
>
> Oh come on, John. You've not got a 380Z. You've got a 19" cake tin.
LOL!
--
Pete Peter Turnbull
Network Manager
Dept. of Computer Science
University of York
--- Tony Duell <ard(a)p850ug1.demon.co.uk> wrote: > >
> > The box in question is a RML-380Z-D model, with
> dual 5
> > 1/4" drives, and I think, 32K RAM. It has two
> video
>
> There is room for 32K RAM (2 rows of 4116s) on the
> CPU card.
Oh - must have miscounted :-/
> If you have
> the RAM expansion card (which, as you imply is a CPU
> board with the CPU
> and many other chips messing and a different address
> decoder PROM) then
> you possibly have up to 56K RAM.
I has an address *prom*? I thought it was purely TTL?
I s'pose its hard to tell with all the pretty little
coloured[1] splodges all over the socketed chips
(presumably to aid the people who put the chips in...)
> COS = Cassette Operating System, and is basically a
> bootstrap loader (for
> cassette or disk) and a machine code monitor.
I figured that much out eventually :)
> I should have a system disk somewhere, but it would
> take some time to find
> it.
Kewl - any system disk, even a duplicate is good - at
least one may work.
> I also should have the COS user manual (giving
> some of the calls,
> etc)
In what format? Electronic? (i.e. easily sharable?)
> but I don't have the optional source lisitng of
> COS (and FWIW, I'm
> looking for it too).
As soon as the <insert your own expletive> person who
broke our lab's device programmer fixes it - i'll dump
the COS roms. I managed to dump the disk rom, using
an older programmer - but it wouldn't touch the older,
mainboard devices - It complained of over-current. I
suspect it was not intended to cope with *all* devices
- unlike our really fancy new one - which is broke :(
> Yes, or X to boot with the floppies swapped over
> (the 'B' drive is A:).
> The latter is useful if one drive decides to fail...
How thoughtful of RML :)
> There is an LED on the
> floppy
> > controller, it flashes with a kind of 'heart beat'
> > pattern i.e.
> Flash-flash--pause--flash-flash--pause
>
> Are you sure this is a standard RML disk controller?
> I can't find any LED
> on the schematics, and I don't remember there being
> one when I looked
> inside my machine. The standard disk controller is
> one card that fits
> onto the 50 way 'bus' ribbon cable, and which
> contains a 1771 disk
> controller (Single density only) and a 8251-based
> serial port (device SIO-4)
Um, no! I know nowt about this box - I'll check the
disk controller very carefully tonight. Its software
is certaining interesting - very wacky code, quite a
bit of it polymorphic - just to hurt your brain :-/
The card *is* on the main bus, and is connected to the
floppy and serial port. It is also stamped (C)RML,
ISTR.
I've a really nasty feeling, this machine has been a
student project, and they used the floppy controller
as a secondary cpu :) Should there be a mostek MT4802
(2Kx8 SRAM) in the socket above the eprom? It doesn't
even occupy all the socket (which is suspicious) and
the ROM does contain memory sizing routines...they're
obvious :) I *really* hope not!
Dave.
[1] Appologies if you think I spelt it wrogn ;0
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--- Tony Duell <ard(a)p850ug1.demon.co.uk> wrote: > >
> >
> > --- Tony Duell <ard(a)p850ug1.demon.co.uk> wrote:
>
> Incidentally, you don't need to send me a private
> copy of e-mail that you
> post to the list. I read classiccmp :-)
Apologies - a habit left over from another mailing
list, where it is customary.
> > OH! Something else that became obsolete before I
> > started taking things apart...(I'm only 23)
>
> Wait until you come across 1702 EPROMs. They run
> from a 14V supply,
> conventionally called +5V and -9V (there is _no_
> ground pin on the chip).
> Inputs and outputs are TTL-compatible wrt a 'ground'
> 5V below the +ve
> rail (so if you use +5V and -9V, the address and
> data lines link up to
> normal TTL).
>
> Programming 1702s is even more 'fun' and involves
> taking several pins up
> to quite high voltages...
Mmmmm! Lovely stuff! I wonder if me old mucker from
secondary school/uni still has that box of really old
smelly eproms - i'll give him a call and find out...
> > That would explain rather a lot. I'll have to
> build
> > me an eprom dumper then.
> > I'll get one of them 24 bit (8255 based) ISA IO
> cards
> > from maplin (about 25 quid ISTR) and make one up.
>
> Seems reasonable.
>
Damn damn and triple damn! I just got the latest
MAPLIN cataloge last night - they don't do the 8255
card anymore, they do a carp replacement - using TTL -
costing, wait for it, 100gbp! They can *get lost*
i'll build my own darned pc card - I wonder if farnell
still do 'blank' ISA prototyping cards?
I need to get on and build up my PCB making equipment
again - so I can build myself, and other serious
computer geeks, special cards :)
How about a dual 8255 based card? 48 bit programmable
digital IO anybody?
Single density floppy controller?
Oh! The list could be endless!
> Since the COS ROMs are readable by the 380Z's
> processor (unlike the
> address decoder, say), you could presumably read the
> ROMs by a little
> program on the 380Z and squirt the data out of the
> serial port.
I could if I had any data on it :(
> > > > > Are you sure this is a standard RML disk
> > > controller?
> > MB8877a which I believe is a 5voltonly WD1793
> >
> > i.e. A double density controller. There are
> obviously
>
> Yes... This sounds like a double-density card
> alright. And it's a card
> I've never seen and have no schematics or data on
> :-(.
>
> Which means it may well need a non-standard system
> disk as well,
> something that none of us seem to have :-( :-(...
>
Damn! Foiled! Looks like i'm going to have to go
with Dwight's (sp?) suggestion and write my own bios.
That should get me back up to speed with the old Z80
again...i'll try any system disk anybody sends me
anyway - I can alway find the correct controller card
for them. I think it was Monsier Honniball who had
some RML380Z bits...
Dave.
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