From: Bill Sudbrink <bill(a)chipware.com>
>this morning... Anyway, here are the important
>bits to get the 600 (Superboard II) going:
Thank Bill, and congratulation on the IMSAI revival... I've got a few
broken ones (8080 and VDP-80) if you feel like doing any charity work....
;)
I'll let you know if the old girl ( the Superboard ) has some life left in
her.
Regards
- Mike: dogas(a)leading.net
Have you had any luck getting a response from Bill?
His home page is http://www.cs.unc.edu/~yakowenk/
previously I have been able to contact him at
yakowenk(a)cs.unc.edu
but my last message went unanswered. Maybe he is away on holiday or
something.
David
-----Original Message-----
From: Jay West <jlwest(a)tseinc.com>
To: Discussion re-collecting of classic computers
<classiccmp(a)u.washington.edu>
Date: Tuesday, 13 July 1999 9:33
Subject: Paging Bill Yakowenko!
>Sorry to all on the list for this personal traffic; I don't have an email
>address handy for Mr. Bill Yakowenko.
>
>Bill;
>
>I'm getting the eproms you wanted from overseas. Send me your mailing
>address so I can forward them to you.
>
>Thanks!
>
>Jay West
>
> J2 (to the left rear as you are looking down on the
> board with the keyboard toward you):
I should add that pin 1 is to the right given the above orientation.
Bill Sudbrink
Sorry, it turned out to be this evening instead of
this morning... Anyway, here are the important
bits to get the 600 (Superboard II) going:
J2 (to the left rear as you are looking down on the
board with the keyboard toward you):
Pin 7: casette out (to tape player mic in)
Pin 8: casette ground for both casette in and out
Pin 9: casette out (to tape player AUX in) (same as pin 7
except pin 7 has an additional 10K resistor in series)
Pin 10: casette in (to tape player headphone out)
Pin 11: video ground
Pin 12: video signal
(Other J2 pins are either no connect or are used for
serial port implementations. These are not populated
at the factory and don't look like they are populated
on your 600)
J3 (to the right of J2) gives TTL level access straight to the
USART and is not normally used.
J4 (to the left of the keyboard) gives you access to the square
wave generator circuit (not factory populated) and to part of the
keyboard logic (I guess to attach a non-analog joystick or
a numeric keypad).
J1 (the 40 pin DIP socket just above the keyboard to the right)
provides access to all address and data lines and some 6502
signals)
The board wants +5 volts usually attached at the back right
side to one of the pads labeled with a +.
The ROM code wants all caps as input, so make sure your
SHIFT LOCK key is down. If everything is working, when you
power up, you will get a screen of garbage. Don't panic.
Press the BREAK key. The screen should clear and you should
get a prompt like:
D/C/W/M?
Press C (again, case matters). Just press return if it asks for
screen width or memory size. You should then be in the BASIC
in ROM.
That should get you started,
Bill
Hello Tony:
In a message dated 7/16/99 9:52:57 PM Eastern Daylight Time,
ard(a)p850ug1.demon.co.uk writes:
> In a normal colour TV signal these are mixed together. This leads to
> several problems, including the fact that colour artifacts can occur with
> arrays of vertical lines in the image (CoCo owners will have seen this -
> and used it to get more colours). And that the luminance resolution
> (bandwidth) has to be limited to prevent the colour subcarrier from
> causing annoying moving lines in the image.
Is this what causes the infamous dot-crawl on the Spectrum?
Glen Goodwin
0/0
<P.S. - In this CI$ thread, someone mentioned how expensive the service use
<to be. I got my first modem in 1982 - a VIC-modem for the C-64. CompuServ
<was $6.00 per hour *off peak* at 300 baud. I don't remember what it was a
<1200 baud, I couldn't afford the modem, let alone the online charges. I
offpeak 1200 was 12.50 in 1984, I was on in then too.
<seem to recall that on-peak 300 baud was $22, but that might be bit rot.
sounds good to my memory.
I've been one to hae modem access since 1981'ish to BBSs and CIS a bit later
(1984). CI$ was not only 10 based both they also were one of the biggest
users of clustered 10s.
Allison
--- CLASSICCMP(a)trailing-edge.com wrote:
> > Speaking of Compuserve, what is its history?
>
> I think this goes back earlier than you wanted (to a time before
> home micros), but here's an excerpt from a summary written by
> Sandy Trevor [70000,130] I found at
>
> http://www.inwap.com/pdp10/compuserve.txt
>
> ****
>
> This may not be exactly what you had in mind, but it is a pretty accurate
> summary of how 10's have been used at CompuServe over the past 17 years. I
>
> --Sandy
>
>
> We Call Them 10's
>
>
> - A Brief History of 36-bit Computing at CompuServe -
>
> Alexander B. Trevor
> August 31, 1988
>
>
> CompuServe has one of the world's most powerful remaining thirty-six bit
> computing facilities...
> ...my two AHCL friends, Dr. John Goltz and Jeff Wilkins, went to Columbus, >
Ohio...
Wow! I worked with John Goltz around 1984-1986. We both worked at that
company I've mentioned here several times, Software Results Corp, the one
that made the COMBOARD and the one that sponsored "CPU Wars" (with the back-
cover ad). By the mid-eighties, he had moved from Ohio to Arizona, where
he still is. It's been a few years since I've talked to him.
I heard a great story about his days at CI$... He was looking over the
terminal driver and spotted ONE line of assembler with no comment. He
just _had_ to figure out why it was bare. It was, IIRC, a 36-bit immediate
compare against a constant that happened to be a packed ASCII string of all
"$" characters, with a branch. He determined that *that* compare and *that*
branch allowed a person to type ANY CompuServe user id code and use a
password of all dollar signs and log in as them! Talk about a wide-open-
back door. It was patched a short time later. I use the story as an example
of how powerful a single assembler instruction can be on a decent processor.
> By 1978 we had two computer centers - the one in Arlington full of KI's,
> and one in Dublin, Ohio...
In 1988, I worked next door to the Dublin data center, parking my car about
20 yards from the monster dish they had on the west side of the building.
With all that, I am still 10-less. :-(
-ethan
P.S. - In this CI$ thread, someone mentioned how expensive the service used
to be. I got my first modem in 1982 - a VIC-modem for the C-64. CompuServe
was $6.00 per hour *off peak* at 300 baud. I don't remember what it was at
1200 baud, I couldn't afford the modem, let alone the online charges. I
seem to recall that on-peak 300 baud was $22, but that might be bit rot.
P.P.S - in 1986 when I got my TTY with built-in data-set and touch-tone
pad (the one that is no longer installed in the unit), I wanted to test
the modem. I plugged it into the phone line and dialed up CompuServe.
It worked at 110 baud! I didn't stay on long at less than half the normal
bandwidth. but I did get on.
===
Infinet has been sold. The domain is going away. Please
send all replies to
erd(a)iname.com
_________________________________________________________
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------------------------------------------------------------------------------
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Coming this October 2-3: Vintage Computer Festival 3.0!
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[Last web site update: 05/25/99]
Well.... I was given the camera for free with the understanding it didn't
work at all. Once I did get it working, it didn't work all that well. The
viewfinder was starting to go bad, and the tape door lock was broken (duct
tape...)
I think I still have the camera part somewhere in a box. I figured that it
wasn't worth trying to fix the 'second half' of it. From what I remember,
the camera had standard RCA connections, so it would be good for a
video-capture camera.
Talking about video capture.... and video standards... On my video card,
there's three plugs: VGA, composite, and S-Video. What is S-video? my
video card didn't have a manual with it, so....
///--->>>
-Jason Willgruber
(roblwill(a)usaor.net)
ICQ#: 1730318
<http://members.tripod.com/general_1 >
-----Original Message-----
From: Tony Duell <ard(a)p850ug1.demon.co.uk>
To: Discussion re-collecting of classic computers
<classiccmp(a)u.washington.edu>
Date: Friday, July 16, 1999 3:14 PM
Subject: Re: Video standards (was Re: digital cameras)
>
>Couldn't you get the head drum anywhere? A lot of them are still
>available - the TV spares place I normally deal with has head drums for
>VHS and Betamax machines going back to the late 1970's. Prices are pretty
>reasonable - a 2 head VHS drum for a 3V01 or something is about \pounds
7.00
>
>-tony
>
>
