Multiple system disk

Details Multiple system disk Multiple system disk

1984-07-02

1985-12-31

Stellar, George G.

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

360 69, 360135, G11B 2336, G11B 2732, G11B 3100, G11B 2108

Patent

active

045624950

ABSTRACT:
A multiple system data storage disk adapted for use with more than one type of computer. The disk is specially formatted to include software for each computer. The disk includes four discrete recognition headers, one for each target computer, placed at locations on the disk where each computer expects to being its data loading operation. Each header further includes software directing the computer to step out to a discrete group of data tracks located elsewhere on the disk. Each data track group contains an identical program, written in each target computer's language. The disk is suited to video games for multiple computers. An alternative embodiment of the disk includes a header or headers containing a magnetic signature for copy protection. A disk can be produced with twenty-four such headers, one for each type of computer on the market, which can be mass produced to provide low-cost copy protection for all machines.

REFERENCES:
patent: 4016603 (1977-04-01), Ottesen
patent: 4321635 (1982-03-01), Tsuyuguchi
patent: 4338644 (1982-07-01), Staar
patent: 4507693 (1985-03-01), Matsuda et al.
IBM Technical Disclosure Bulletin, vol. 23, No. 2, Jul. 1980, pp. 554-555, Hybrid Storage Disks, Iseminger et al.

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