Port expansion adapter for video game port

Amusement devices: games – Aerial projectile game; game element or accessory therefor... – Target

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Details

273148B, 273DIG28, 307115, A63B 6700

Patent

active

045881871

ABSTRACT:
A game port expander for a video game input port includes a plurality of first multi-pin ports respectively connectable to four different game controllers, and a second multi-pin port connectable to the input port of a video game. Each game controller has a "fire control" switch which is connected to a selected pin of the corresponding first port for applying a signal to that port when the switch is actuated. That signal is converted by a decimal-to-binary converter to a binary representation of that first port which is applied to the inputs of a two-bit IC latch. The switch signal is also applied through an OR gate to an RC timing circuit which activates the latch after the signal is present for a predetermined time, to actuate an IC switching circuit which provides an interconnection between predetermined terminals of the second port and the corresponding terminals of the selected one first port.

REFERENCES:
patent: 3368200 (1968-02-01), McNicol
patent: 4353552 (1982-10-01), Pepper, Jr.
patent: 4381456 (1983-04-01), Saito et al.
patent: 4501424 (1985-02-01), Stone et al.
Radio Shack 1984 Catalog, p. 178 and Radio Shack's TRS-80 Multi-Pak Interface Owners Manual.

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