Microprocessor instruction that allows system routine calls...

Details Microprocessor instruction that allows system routine calls... Microprocessor instruction that allows system routine calls...

2011-08-09

2011-08-09

Alrobaye, Idriss N (Department: 2183)

Electrical computers and digital processing systems: processing

Processing control

Mode switch or change

C712S228000, C712S220000, C712S043000

Reexamination Certificate

active

07996659

ABSTRACT:
An apparatus comprises register means for storing a return context upon initiation of a supervisor call instruction and restoring means to restore a privilege level and status register upon execution of a supervisor return instruction. The supervisor call instruction can be called from all contexts.

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