| 摘要 |
<p>A microprocessor (10) including unprime registers (20) for use during normal operation, prime registers (22) for use during interrupts, a normal register set (16) for use during normal operation and conventional interrupt operations, an alternate register set (18) for use during fast interrupt operations, and a memory stack (50). Three status bits (26,28,30) are used to indicate that one or more fast interrupts have been initiated but not completed, that a fast interrupt is occurring but there are no other fast interrupts being processed, and that the CPU (14) is currently processing a fast interrupt. These status bits (26,28,30) indicate if there is a recursion jeopardy and are used to control the flow of information between the normal (18) and alternate register(18) sets and the memory stack (50) in order to prevent recursion. <IMAGE> <IMAGE></p> |
