Z-World OP7100, User Manual

Page: 104 / 122

OP7100 104 s Memory, I/O Map, and Interrupt Vectors
Table C-5. Interrupt Vectors for Z180 Internal Devices
Address Name Description
—
NMI_VEC
Used for power-failure detection
—
INT0
Available for use.
0x00 INT1_VEC Available for use as expansion bus attention
INT1
vector
0x02
INT2_VEC
Reserved for Development Board (CM7100),
not available for use on CM7200
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
CSI/O_VEC
Available for programming (CM7200), not
available for use on CM7100
0x0E
SER0_VEC
Asynchronous Serial Port Channel 0
0x10
SER1_VEC
Asynchronous Serial Port Channel 1
$
Interrupt Vectors
Table C-5 presents a suggested interrupt vector map. Most of these
interrupt vectors can be altered under program control. The addresses are
given here in hex, relative to the start of the interrupt vector page, as
determined by the contents of the I-register. These are the default interrupt
vectors set by the boot code in the Dynamic C EPROM.
To “vector” an interrupt to a user function in Dynamic C, use a directive
such as the following.
#INT_VEC 0x10 myfunction
The above example causes the interrupt at offset 10H (Serial Port 1 of the
Z180) to invoke the function
myfunction()
. The function must be
declared with the
interrupt
keyword, as shown below.
interrupt myfunction() {
...
}
Refer to the Dynamic C manuals for further details on interrupt
functions.