Contec BUF-PCI(98), Руководство пользователя

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Programming
BUF-PCI(PC), BUF-PCI(98)
79
Detailed Description
Access these ports using either byte access or word access on even ports.
Neither word access on odd bytes nor double-word access is allowed.
Each port is detailed below.
General-purpose access ports
(+00h tF7h) [input and output]
D7 D6 D5 D4 D3 D2 D1 D0
+0
(+00h)
+1
(+01h)
+247
(+F7h)
General-purpose output port F7h
:
General-purpose output port 00h
General-purpose output port 01h
:
These ports are for accessing boards in the I/O expansion unit.
Accessing these ports allow input and output to and from xx00h
through xxF7h.
Interrupt request mask register
(+F8h tF9h) [input and output]
D7 D6 D5 D4 D3 D2 D1 D0
+248 IRQ7 IRQ6(INT2) IRQ5(INT1) IRQ4 IRQ3(INT0)
(+F8h) Mask Mask Mask Mask Mask
+249 IRQ15 IRQ14 (INT6) IRQ12(INT5) IRQ11 IRQ10(INT4) IRQ9(INT3)
(+F9h) Mask Mask Mask Mask Mask Mask Mask
1 1 1
1
Set the mask for an interrupt request signal from a board in the I/O
expansion unit. Also, input the mask status of the interrupt request
signal which has been set up.
An interrupt request signal whose bit is set to 1 is masked and an
interrupt request signal from a board in the I/O expansion unit is
disabled. On the other hand, an interrupt request signal whose bit is set
to 0 is non-masked. An interrupt request signal from a board in the I/O
expansion unit is enabled and an interrupt request is generated. When
the power is turned on, all are masked.
Parentheses indicate notation of the C-bus interrupt request signal.