Method for replacing keyboard data using single step process mod

Details Method for replacing keyboard data using single step process mod Method for replacing keyboard data using single step process mod

1989-05-31

1992-06-09

Lee, Thomas C.

Boots, shoes, and leggings

3642342, 3642344, 3642377, 3642801, 3642804, 3642808, 3642813, 3642844, 3642842, 3642817, 364DIG1, G06F 3023, G06F 922, G06F 9455, G06F 945

Patent

active

051214725

ABSTRACT:
In a computer system including a central processing unit, a program memory, a control program, a keyboard hardware interrupt handler routine and a single step interrupt handler routine, a method for replacing conventional data from a keyboard with user defined data including placing the central processing unit into single step mode, determining with the single step interrupt handler routine whether a keyboard hardware interrupt handler routine involves a keyboard data input instruction, and, if so, replacing the conventional data with user defined data, followed by either repeating the process or returning the system from single step mode to the main control program.

REFERENCES:
patent: Re32040 (1985-11-01), Bagley
patent: 4488258 (1984-12-01), Struger et al.
patent: 4641262 (1987-02-01), Bryan et al.
patent: 4718029 (1988-01-01), Morino et al.
patent: 4860234 (1989-08-01), Lapeyre
patent: 4924431 (1990-05-01), Lapeyre
patent: 4937778 (1990-06-01), Wolf et al.

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