Patent
1994-12-20
1998-02-10
Harvey, Jack B.
39520005, 395290, 395280, 395729, G06F 940
Patent
active
057179310
ABSTRACT:
A master device (11) can access slave devices (12) either speculatively or non-speculatively. The slave devices (12) can be either non-hazardous devices or hazardous devices which exhibit status changes on reading. The master device (11) issues an access request including information as to whether the request is speculative or non-speculative, the slave device (12) then responds to the master device (11) with a negative acknowledgment that access is denied if the access request is speculative and the slave device (12) is hazardous. Otherwise, if the slave device (12) can deal with the request, a positive acknowledgment is sent. If the master device (11) receives a negative acknowledgment, it continues to reissue updated access requests until a positive acknowledgment is received.
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Eifert James B.
Harwood, III Wallace B.
Pardo Ilan
Sapir Adi
Shterman Danny
Dharia Rupal D.
Harvey Jack B.
Hayden Bruce E.
Hill Susan C.
Motorola Inc.
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