Z-World XP8900 Manuel d'utilisateur télécharger pdf (Page 79)

PK2100

Appendix D: I/O Map and Interrupt Vectors s D-7

Jump Vectors

These special interrupt vectors occur in a different manner. Instead of

loading the address of the interrupt routine from the interrupt vector, these

interrupts cause a jump directly to the address of the vector, which will

contain a jump instruction to the interrupt routine. This is an example of

such a vector.

0x66 nonmaskable power-failure interrupt

Since non-maskable interrupts can be used for Dynamic C communica-

tions, the interrupt vector for power failure is normally stored just in front

of the Dynamic C program. A vector may be stored there by the command

#JUMP_VEC NMI_VEC name

The Dynamic C communication routines relay to this vector when the

nonmaskable interrupt is caused by a power failure rather than by a serial

interrupt.

Table D-4. Interrupt Vectors for Z180 Internal Devices

Address Name Description

0x00 INT1_VEC Expansion bus attention INT1 vector.

0x02 INT2_VEC INT2 vector, can be jumpered to output of

the real-time clock for periodic interrupt.

0x04 PRT0_VEC PRT timer channel 0

0x06 PRT1_VEC PRT timer channel 1

0x08 DMA0_VEC DMA channel 0

0x0A DMA1_VEC DMA channel 1

0x0C CSIO_VEC Clocked Serial I/O

0x0E SER0_VEC Asynchronous Serial Port Channel 0

0x10 SER1_VEC Asynchronous Serial Port Channel 1

1 2 ... 74 75 76 77 78 79 80 81 82 83 84 ... 113 114

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Z-World XP8900 Manuel d'utilisateur Page 79