Patent
1991-06-11
1994-10-11
Dixon, Joseph L.
395400, G06F 1200, G06F 1204, G06F 1300
Patent
active
053554655
ABSTRACT:
A data storing device has at least first to third registers. When the first register is accessed, the second register is set into an accessible state in a preset cycle succeeding to a cycle in which the first register is accessed. The same address as that of the second register is assigned to the third register and access to the third register is inhibited in a preset cycle in which the second register is accessed. An access control circuit controls permission/inhibition of access to the second and third registers.
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patent: 4344130 (1982-08-01), Fung et al.
patent: 4368515 (1983-01-01), Nielson
patent: 4432067 (1984-02-01), Nielson
patent: 4713748 (1987-12-01), Magar et al.
patent: 4811202 (1989-03-01), Schabowski
"Software-Controlled Memory Duplication", by H. Al-Riahi, Microprocessors and Microsystems, vol. 9, No. 1, pp. 21-23, Jan. 1985.
Asta Frank J.
Dixon Joseph L.
Kabushiki Kaisha Toshiba
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