Lockout for terminal keys

Details Lockout for terminal keys Lockout for terminal keys

1987-05-29

1989-05-02

Malzahn, David H.

Boots, shoes, and leggings

341 23, G06F 100

Patent

active

048274402

ABSTRACT:
Method and apparatus are disclosed for locking out the keys of a personal computer keyboard such that information conveyed by pressing certain keys are not processed by the PC. The method includes the steps of selecting certain keys to be locked out. A lockout routine is addressed which is used to lock out the selected keys. During the lockout procedure keys are identified which are to be locked out. Keys which are not capable of being locked out are used to change the lockout status of a key or to exit the lockout routine.

REFERENCES:
patent: 4092527 (1978-05-01), Luecke
patent: 4140883 (1979-02-01), Zielke
patent: 4267578 (1981-05-01), Vetter
patent: 4688020 (1987-08-01), Kuehneman
"Software Security Key", IBM Tech. Disclosure Bulletin, vol. 28, No. 11, Apr. 1986, pp. 5108-51 12.

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