Aaah! - reminiscence time.
We built a video game using these in about 1975 - 1976. Yep, 22 years old
would be about right.
This was THE gee whizz chip to have at that stage. It had a fantastic FOUR
games as I recall. I probably have it in the deep dark dungeon still (aka
my Museum :-)).

Before that Electronics Australia did firstly a horrendous design with TTL
and several boards to do just Pong and then followed this by a cunning
design using CMOS and cheating as hard as possible. AFAIR this design first
introduced me to the use of CMOS gates with R/C as required as analog
delays, monostables etc. This was crucial in this design as it generated TV
V & H sync, bat position (horizontal only?) x 2 and the incredible moving
ball with X and Y freedom - amazing! (or, it was then). Also delays needed
for bat and ball width & depth etc. Nowadays the circuit would hardly rate
a second glance but then it was an eye opener to me.


Russell McMahon

=============================


Hi!
I've got a very old but brand new chip:

AY-3-8500
GIMT 7706

As you see it's 22 years old!
I bought it when I was an Electronics Engineering student, but never built
the unit.
It's yours for free if you want it.
The only matter is we're (the chip and me) in Argentina (in Patagonia, at
the far south), so it'll take a long by surface mail.
Anyway I'll be waiting your coordinates.

Ing. Marcelo M. Fornaso
Vte. Lopez y Planes 285
8324 Cipolletti
Argentina
Te: (299)477-4469
www.sysameri.com/marcelo/



  ----- Original Message -----
  From: Marco DI LEO
  To: PICLIST@MITVMA.MIT.EDU
  Sent: Tuesday, August 31, 1999 12:20 PM
  Subject: Re: PIC history, PIC1650, AY-3-8910, SP0256 et al.

  Question:

  Is there someone on the list that happen to have (and wishing to sell,
  even surplus) some AY-3-8500, AY-3-860x or AY-3-8765 (they are listed in
  the book)? These are the chips for the (very) old videogames like: balls
  & paddle, roadrace, motor cycle, etc. I would just *love* to have one to
  build an unit...

  Ciao
    Marco
  ----
  Marco DI LEO
  m.dileo@bigfoot.com
  http://members.tripod.com/~mdileo/