BOOT ADDRESS CONVERTER

PROBLEM TO BE SOLVED: To obtain an improved interface with respect to a microprocessor by providing a specific address preventing means and an address replacing means. SOLUTION: A boot address locator 194 is provided with a bus input, a bus output and an input for indicating whether the contents of...

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Bibliographic Details
Main Authors RECTOR RUSSELL M, SABERNICK FRED C, RAHMAN MIZANUR M, GROSZ MARTIN J, FU PETER, SPROUSE JEFF A
Format Patent
LanguageEnglish
Published 22.01.1999
Edition6
Subjects
CALCULATING
COMPUTING
COUNTING
ELECTRIC DIGITAL DATA PROCESSING
PHYSICS
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Summary:PROBLEM TO BE SOLVED: To obtain an improved interface with respect to a microprocessor by providing a specific address preventing means and an address replacing means. SOLUTION: A boot address locator 194 is provided with a bus input, a bus output and an input for indicating whether the contents of a bus are addresses to be outputted to Ibus. When the contents of a bus are not addresses to be outputted to Ibus, data is put through to the locator 194 without changing data. An AND gate 400 is provided with two inputs, one of them is from a boot exception vector indicator register (BEV-PIC) 218 and the other is an input for indicating whether an input is an address to Ibus. When both of them are true, the AND gate 400 outputs a logic 1 (SELECT = 1) to the selective input of a multiplexer (1...6) to generate the relocation of the address of the bus.
Bibliography:Application Number: JP19980147065