The display was a standard NTSC raster black-and-white monitor. The main logic board used a Signetics 2650 8-bit microprocessor chip.
The video timing was generated using TTL SSI synchronous counters and standard logic gates.
The sound board was separate from the main logic board. The explosion sound was based on a pseudo-random number generator which used a resistor ladder to generate something approximating white noise (although many thought it sounded like someone coughing). There was a single tone generator as well as gating logic, all controlled by the main logic board.
The four directional control knobs were encoded using standard 12 position make-before-break wafer switches that had the detent ball removed. Each had a matrix of diodes attached which generated a 4-bit Gray code.
Main CPU : S2650 (@ 625 Khz)
Screen orientation : Horizontal
Video resolution : 256 x 240 pixels
Screen refresh : 60.00 Hz
Palette Colors : 2
Players : 4
Control : dial
Buttons : 4 (1 for each player)