參數(shù)資料
型號: PCPIC
英文描述: PC(ISA)BUS I/O CARD
中文描述: 電腦(ISA)總線的I / O卡
文件頁數(shù): 16/40頁
文件大?。?/td> 468K
代理商: PCPIC
RINT. Pointer value 13H
This register lets you read the interrupt status. Bit 7 if high says an
interrupt has occurred. Bits 2, 1 and 0 contain the priority-encoded
value of the group 1 input which produced the interrupt. For
example, if group 1 bit 2 and group 1 bit 5 both created an interrupt,
this register will contain the value 85(hex), because the group 1 bit 5
input is a higher priority than the bit 2 input. You can, of course,
read all the inputs anyway from the G1IN register; the purpose of
the RINT register is to capture a transient interrupt input. The
LKN1-5 interrupt link (LK1) does not have to be connected. If it is
not, you can still read and clear the RINT and CLINT registers but
the PC will not receive any interrupts.
CLINT. Pointer value 13H
Writing any value to this register clears bit 7 of the RINT register
ready for the next interrupt.
J230 PCPIC
Page 16
2192-09155-000-000
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