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X80: Difference between revisions
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address of the stack pointer. It then halts the Z80, and performs the floating | address of the stack pointer. It then halts the Z80, and performs the floating | ||
point operations, reading the calculator instructions as native op-codes until it | point operations, reading the calculator instructions as native op-codes until it | ||
reads the a | reads the a FCE instruction. At this point it replaces the contents of the stack | ||
pointer with the next address after the | pointer with the next address after the FCE instruction, forces a RET instruction | ||
onto the bus and returns control to the Z80. | onto the bus and returns control to the Z80. | ||
