Electronics America Computer Hardware User Manual

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CHAPTER 12 INTERRUPT FUNCTIONS
The µ PD78214 has the following two interrupt handling modes. Either mode can be selected by the program.
Interrupt handling by a macro service is limited to the interrupt request sources provided with a macro service
handling mode listed in Table 12-1.
Table 12-1 Interrupt Request Handling Modes
Interrupt request handling mode Processed by:
Vectored interrupt
Macro service
ProcessingPC and PSW contents
Saved and restored
Retained
Program control branches to a
specified service program.
Predetermined processing,
such as data transfer between
memory and I/O, is performed.
Software
Hardware
(firmware)
Maskable vectored interrupts can easily be controlled by multiple-interrupt handling with two priority levels.