Electronic apparatus

Details Electronic apparatus Electronic apparatus

1993-10-21

1996-02-20

Beausoliel, Jr., Robert W.

Boots, shoes, and leggings

395550, 3649415, 358337, G06F 1134, G06F 100, G06F 300, H04N 595

Patent

active

054936748

ABSTRACT:
In control using a patch correctable microcomputer, the patch correction can have no effect on the timing of the control operation of the micro computer. Call instructions CALL 1, CALL 2 . . . for shifting, in synchronism with the operation of the microcomputer, over to a patch correction program in a RAM, are intermittently inserted into a control program stored in a ROM. A reciprocal number of invalid instructions NOP are put after this patch correction program in accordance with the length of the patch correction program. After a patch correction program has been carried out, the program in the ROM is returned to after a passage of time set according to the number of invalid instructions, so that the time for execution of the program in the RAM which is based on the microcomputer call instruction can be made constant irrespective of the length of time of the patch correction program, and will therefore have no effect on the timing for carrying out the program in the ROM.

REFERENCES:
patent: 4542453 (1985-09-01), Patrick et al.
patent: 4745572 (1988-05-01), Wilburn
patent: 4751703 (1988-06-01), Picon et al.
patent: 4802119 (1989-01-01), Heene et al.
patent: 4831517 (1989-05-01), Crouse et al.
patent: 4982360 (1991-01-01), Johnson et al.

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