AY-3-8500

AY-3-8500

The TV Master MK IV uses the AY-3-8500 integrated circuit (IC) by General Instrument Microelectronics. They were one of the pioneers MOS large-scale integration (LSI) microelectronic circuitry. It is a single chip solution for a pong game, which became very popular in 1977.

There were two versions of the AY-3-8500 IC. One was for a 625-line raster for PAL standard televisions, whilst AY-3-8500-1 was for a 525-line raster for NTSC standard televisions.


Pong Chip

Pong Chip

This IC has six selectable games.

  • Tennis
  • Soccer
  • Squash
  • Practice
  • Rifle 1
  • Rifle 2

Pinout

Pinout
PIN Function
1 Not Connected
2 Vss (Ground)
3 Sound Output
4 Vcc
5 Ball Angles
6 Ball Output
7 Ball Speed
8 Manual Serve
9 Right Player Output
10 Left Player Output
11 Right Bat Input
12 Left Bat Input
13 Bat Size
14 Not Connected
15 Not Connected
16 Sync Output
17 Clock Input
18 Rifle Game 1
19 Rifle Game 2
20 Tennis
21 Soccer
22 Squash
23 Practice
24 Score and Field Output
25 Reset Input
26 Shot Input
27 Hit Input
28 Not Connected

Rifle Games

PCB Connections

Pin 26, and pin 27 are for the rifle games. It is possible to enable this functionality to make the games work as shown in the following sections of this article.

These ICs are hard to find these days, however now that everyone knows that this console has this chip, many people will get the console instead of making one. These consoles were mass-produced and sold throughout the world, however there are less and less every year.

This Article Continues...

Binatone TV Master MK IV
Binatone TV Master MK IV Inside
Binatone TV Master MK IV PCB
AY-3-8500
Binatone TV Master MK IV Controls
Binatone TV Master MK IV Power
Binatone TV Master MK IV Packaging
AY-3-8500 Rifle Game Mod & Circuit