>
> Stay away, stay away! This guy has a track record of misrepresenting his
> products, talking your money, and then ... nothing. No refund, no regrets,
> nothing.
>
>
> -----Original Message-----
> From: cctech-bounces at classiccmp.org [mailto:cctech-bounces at classiccmp.org]
> On Behalf Of David Griffith
> Sent: Sunday, October 19, 2008 4:06 PM
> To: cctalk at classiccmp.org
> Subject: imsai.net
>
>
> Does anyone know what's going on with imsai.net regarding the Series 2
> machines? I looked at the site hoping to get a drive chassis, but that's
> gone along with related to communication with Todd Fischer.
I had heard something to this affect as well. Several people had placed
orders and paid deposits and all went into a black hole. The word on the
street was that he abandoned the idea but left the web site up. I sent him
email about six months ago asking about one of his replacement part kits for
the Imsai and never got a response back.
In response to James regarding whether or not I will ship to UK. Yes, I
will ship worldwide if:
1) Paypal is accepted
2) You pay for shipping of course...
Note that there is going to be a HUGE lot of stuff that is going to be
listed. There is just too many
things and the we are moving. The wife is complaining too :-) I will of
course keep some of the rarer
transputer hardware, but majority of the other stuff is going. The books
and documents I collected are massive
and that will be the next to go up. I really hope someone in the newsgroup
gets them as I really want these preserved
and scanned (if possible)...
Hi, All,
I'm just finishing up assembling a PET "Video Mixer" from an old JPG
of a much older scan of said circuit. This particular one is annotated
as being from the "Commodore Pet Users Club of England - Newsletter
issues 1 & 2, page 9". It's the variant with three NOR gates ('LS02),
with a few resistors, capacitors, and a diode. The part that I'm
curious about is how much variation is allowed in the caps.
The schematic shows the horizontal sync coupled to a gate via a "2200 mf"
non-polarized cap. I don't know that I have any disc or ceramic caps that
large lying around. The output of that gate (which NORs the inverted
vertical sync with the massaged horizontal sync) feeds unto a "47mf"
tantalum cap (then pulled down to ground by a diode, and wire-ored to
inverted video out/composite out via a 470 Ohm resistor). I have 47uF caps,
but that seems pretty large to me.
I have a basic understanding of RS-170-type video, and I know this circuit
is probably going to produce a signal that "modern" IC-based video inputs
will not like (much the same way the classic RCA CDP1861 video behaves),
but fortunately, I have an old B&W security-type monitor to plug this into
(which has already been tested with a CDP1861).
I'm just curious why the caps are so large. I think I get what's going
on with this circuit (the way it combines the syncs and video), and I've
heard of similar circuits being used successfully by others, so with
luck, it'll work the first time.
Oh... in case anyone is wondering why I'm bothering, I have a couple of
naked PET boards here, no chasses, no CBM monitors. I did cobble up a
DC-based harness (+5, +12, -5V, no tape motor voltage, but then no tape
drive, either) for testing, and I do get "interesting" looking pips on
a 'scope when I check for video, so I'm hopeful that the boards are
working well enough to at least give me a screen full of _something_,
even if it's the classic "garbage" screen you get when the machine
isn't running well enough to zero video RAM.
So has anyone here made an external PET video adapter and have any
experiences to share about what worked and what might not have worked?
Thanks,
-ethan
P.S. - I found another type of composite circuit using a CD4011 as an
inverter and a CD4066 to mix the signals, but for some reason I don't
have all the components labelled on my drawing - the cap on hsync in
particular. One interesting variation with that one is that the 'LS02
circuit has a 1.5K pulldown on hsync between the cap and the gate,
while the CD4011/CD4066 circuit has a 10K pot. How much adjustment on
hsync is likely to be needed between the PET and the first gate of the
composite circuit?
--
Ethan Dicks, A-333-S Current South Pole Weather at 13-Oct-2008 at 03:50 Z
South Pole Station
PSC 468 Box 400 Temp -54.4 F (-48.0 C) Windchill -76.4 F (-60.2 C)
APO AP 96598 Wind 5.1 kts Grid 65 Barometer 671.7 mb (10943 ft)
Ethan.Dicks at usap.govhttp://penguincentral.com/penguincentral.html
Here's a short (10 question) 'old computer quiz'. It'll probably only be up for a week or so, but should be in the quiz archives after that.
Admittedly, the last 3 questions are rather modern, but fit within the 10 year rule (except possibly Q10).
http://news.bbc.co.uk/1/hi/magazine/7671677.stm
For the record I failed the 1st question which I know I should have got after the recent discussion on Space War. I scored 8 out of 10, though with some questions only having 2 answers it's a bit 50:50!
Regards,
Andrew B
aliensrcooluk at yahoo.co.uk
Does anyone know what's going on with imsai.net regarding the Series 2
machines? I looked at the site hoping to get a drive chassis, but that's
gone along with related to communication with Todd Fischer.
--
David Griffith
dgriffi at cs.csubak.edu
A: Because it fouls the order in which people normally read text.
Q: Why is top-posting such a bad thing?
A: Top-posting.
Q: What is the most annoying thing in e-mail?
Hi,
I am moving and hence I need to sell some of my transputer hardware, books,
and other stuff since space is limited.. In the coming weeks, I am going to
post a ton of stuff on ebay..Check out the current stuff at:
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=260303159467
Cheers,
Fin Engineer
I've been taking an inventory of my storage and the following terminals
need to go, free to anyone who can come and pick them up. I don't have the
time or inclination to ship them. Take one, take ten, I need them gone in
the next month. These were all working when put into storage.
Sorry, these are the dull ones. There will be more interesting ones later.
4 x VT320 (1 x -B3, 3 x -C3)
3 x VT420 (2 x -A4, 1 x -B4)
1 x VT510-B4
8 x VT520 (4 x -A4, 3 x -B4, 1 x -C4)
> 13 x LK201 keyboards
> 10 x LK401 keyboards
approx. 20 Wyse WY-420 terminals + keyboards
1 x LA100-BB DEC Letterwriter 100
1 x DECserver 200/MC
1 x Wyse WY-50 + keyboard
> IIRC it's called a 'Princeton Ultra-X'
Thought so. I worked for Princeton at one point, or rather, the company
scooped them up. Inherited a warehouse full of them that they couldn't
get rid on. Put them to reasonable use with Dell SVR4 servers on the
back end. Unfortunately, they code was long in the tooth and full of
bugs even then, so I don't image that they lasted too long.
Used to have the source code, and the TI 34010 dev environment for Sun3.
Undoubtedly gone in one purge or another.
KJ
P.S. - Dell SVR4 was an awfully good distro.
