Now that's interesting.
So Amiga 2000 Models were availalable in PAL composite out for this side
of the water. (I'm in the UK)
Rod Smallwood
-----Original Message-----
From: cctech-bounces at classiccmp.org
[mailto:cctech-bounces at classiccmp.org] On Behalf Of Jim Leonard
Sent: 28 November 2007 06:42
To: General at icky.berkhirt.com; On-Topic and Off-Topic Posts
Subject: Re: Amiga TV Out
Rod Smallwood wrote:
> I'm sure that I heard that some Commodore systems could do TV out
Composite only, but yes. You could get better results with a "genlock"
device; a few of them supported Y/C ("s-video").
I produced a DVD last year with footage of running Amiga programs and I
had to resort to scan-converting the RGB port itself to get acceptable
quality. My signal path was RGB port->vga adapter->R/G/B/H/V breakout
cable->scan converter->Y/Cr/Cb output->Y/Cr/Cb video capture card. That
sounds heinous, but the scan converter and the video capture card were
very high-end broadcast-quality units (scan converter was RGB Spectrum
Videolink 1650x; capture card was Black Magic Designs Decklink SP) and
there were really only two generational losses (RGB->scan converter and
scan converter->capture card). The quality from this process was an
order of magnitude better than the A500 and A4000's composite video
output port.
> and were in fact used to produce CGI stuff for 'Babylon Five"
That was a NewTek Video Toaster, not a stock Amiga :-) The Video
Toaster hardware had it's own set of video output ports, IIRC, although
I could be wrong as I've never used one.
> Does anybody know which ones and could they do PAL or just NTSC?
All models except the A4000 (and maybe the A3000, but I'm not sure) were
made in NTSC or PAL specific versions, with a different color generator
and crystal to match. The A4000 had a jumper on the motherboard that
selected either NTSC or PAL timings.
You could get any model to "emulate" the other by using free utilities
like Degrader, but these only affected the RGB video output timing. I
used Degrader extensively on my NTSC A1200 to get European PAL games to
run, since they required a 50Hz display, but that didn't affect the
composite video output port, which was still NTSC (although it output
some quasi-NTSC-50-gibberish when running in "pal" mode).
--
Jim Leonard (trixter at oldskool.org) http://www.oldskool.org/
Help our electronic games project: http://www.mobygames.com/
Or check out some trippy MindCandy at http://www.mindcandydvd.com/
A child borne of the home computer wars: http://trixter.wordpress.com/
>
>Subject: Re: Teaching kids about computers...
> From: woodelf <bfranchuk at jetnet.ab.ca>
> Date: Mon, 26 Nov 2007 20:47:21 -0700
> To: General Discussion: On-Topic and Off-Topic Posts <cctalk at classiccmp.org>
>
>Chuck Guzis wrote:
>
>> So, I propose that programming be taught first in machine language,
>> then assembly. That's how I learned to do it.
>
>Real or fictional machine?
Real, use PDP-8 it's simple enough and not too many instructions.
>
>> Cheers,
>> Chuck
>>
>PS. I bet with the right fictional machine, it could be a
>easy step to building hardware.
PISC Pitiful instruction set computer. A varient of TOY idea.
There are others inlcusing a 4bitter.
Allison
Date: Tue, 27 Nov 2007 16:49:10 -0700
From: woodelf <bfranchuk at jetnet.ab.ca>
Subject: Re: IBM mechnical devices
>M H Stein wrote:
>> But I didn't have anything as modern as a 407; In My Day we only had 402s!!!
>> BTW, my claim to fame was making it multiply; they said it couldn't be done, so...
>Has look up " 402 IBM " on the web. That is old stuff, a little more on topic than
>what I have seen lately.
>> Haven't seen any with peripherals on eBay lately though...
>So how many of the those old beasts are still around?
>Ben alias woodelf.
>PS. How did you get it to multiply?
----------
Actually, I think there are a few still around, but by the time you add all the
necessary "peripherals" you've filled a large room...
Don't ask me to do it today, but it was the "add and shift" method used by
most mechanical calculators. Doubt if I still have the "coding form" though
(lots of little circles connected with lines drawn to represent wires; a *real*
machine language, none of that wussy octal & hex nonsense of Kids Today...)
m
Date: Tue, 27 Nov 2007 16:15:29 -0800
From: "Chuck Guzis" <cclist at sydex.com>
Subject: Re: IBM mechnical devices
On 27 Nov 2007 at 16:49, woodelf wrote:
>> PS. How did you get it to multiply?
>Added a 602-A?
>Cheers,
>Chuck
----------
Actually, it was a Big Day when we replaced the 602-A with a 604;
lots o' blinkenlights and warm glowing tubes instead of all those
clicking relays and turning cams.
Only electronic gear in the place until we replaced most of it with
Canada's first Burroughs B-260, grandson of the famous Lost in Space
B-205.
Picture of B-260 (and some other interesting pix & facts) at:
http://ed-thelen.org/comp-hist/BRL64-b.html#B260/B270/B280
Ah, the good old days...
m
We all know decent emulators are a click away. But
what do you do once you're downloaded and installed
the emulator? Much C64 s/w was copy protected to begin
with, so does having an emulator give you the ability
to do much more then code from scratch? Is there s/w
out there?
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-----------Original Messages:
Date: Tue, 27 Nov 2007 15:54:54 -0800
From: davis <davis at saw.net>
Subject: Re: IBM mechnical devices
woodelf wrote:
> M H Stein wrote:
>
>> But I didn't have anything as modern as a 407; In My Day we only had
>> 402s!!!
>> BTW, my claim to fame was making it multiply; they said it couldn't
>> be done, so...
>
> Has look up " 402 IBM " on the web. That is old stuff, a little more
> on topic than
> what I have seen lately.
>
>> Haven't seen any with peripherals on eBay lately though...
>
> So how many of the those old beasts are still around?
> Ben alias woodelf.
> PS. How did you get it to multiply?
>
>
>
How can you do any business work on hardware that can't multiply? The
mind boggles!
Jim Davis
-------------Reply:
Ah, no, for that there was the 604 Calculating punch, equivalent to
a numeric co-processor (but in two somewhat larger cabinets !); since
it was in big demand it made sense to do simple multiplication on the
402s instead of waiting for your turn.
m
Hi,
> I believe some Microsoft Bus Mouse cards had this facility too....
Indeed, all of the ones I've seen have a "slot 8" jumper on them.
I've still got a couple knocking around somewhere along with their
associated meeces.
TTFN - Pete.
> --- Jules Richardson <julesrichardsonuk at yahoo.co.uk>
> wrote:
>
> > Chris - you probably have something quite unique
> > there. Whilst things calling
> > themselves SASI interfaces are common in old
> > 8-bitters, this is the first I've
> > heard of one for the PC...
>
> They're not specific to anything AFAIK. They're not
> ISA cards if that's what you were led to believe.
> They're the same size as a floppy, or old klunker of a
> hard drive (similar to an Ampro Little Board).
> The guy who gave them to me supposedly had a drawing
> for an interface that would allow *any* computer with
> a *parallel* connection to utilize these boards. Kelly
> Leavitt (who sailed off the end of the earth
> apparently, haven't seen him around) should know a bit
> more about these things. I could e-mail Roy Soltoff
> about the schematics, but I doubt he held onto them.
The rumors of my death have been greatly exaggerated.
I've just spent the last 8 months working on a personal project that I'm not quite finished with yet. Nothing to do with classic computers though.
I have a bunch of these boards. They are WD SASI to MF boards. See the WD1002-SHD docs on bitsavers.
Kelly
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so what's a SASI board good for?
I found and took pictures of my Acculogic sIDE-1/16
board (XT/IDE) if anyone would like to take a look.
Besides 1 PAL chip, all standard TTL. Would be nice to
get these things cloned.
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