Boots – shoes – and leggings
Patent
1993-06-11
1995-04-18
Chan, Eddie P.
Boots, shoes, and leggings
364DIG1, 3642802, 3642803, 3642222, 3642417, 3644752, G06F 9445, G06F 1300
Patent
active
054086663
ABSTRACT:
A processor has a local data bus to which an external read-only memory and a mailbox for exchanging data with a host computer may be connected. The processor is re-initialized, and a series of instructions is executed to write a program to be loaded into a program memory. The series of instructions includes an initial test of a state of the mailbox to determine whether data has been written to the input register of the mailbox from the host computer during the activation of the re-initialization signal. Depending on the results of this initial test, the program to be loaded is read either from the input register of the mailbox, or from the external read-only memory through the local data bus.
REFERENCES:
patent: 4430704 (1984-02-01), Page et al.
patent: 5068780 (1991-11-01), Bruckert et al.
patent: 5247659 (1993-09-01), Curran et al.
Electronics & Wireless World, vol. 94, No. 1626, Apr. 1988, Surrey, GB, pp. 344-345, J. Cooke "Z80 Bootstrapping and Communication Interface".
Datebase WPIL, Week 9004, Derwent Publications Ltd., London, GB, AN 90-029493 & TP 128901 (Anon).
Menut Patrick
Odinot Charles
Chan Eddie P.
SGS-Thomson Microelectronics S.A.
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