PCI-SIO4 User Manual
General Standards Corporation
8302A Whitesburg Drive Huntsville, AL 35802, Phone: (256) 880-8787
31
D0
RW
Device Status INTERRUPT PENDING
D1
RW
I/O Status INTERRUPT PENDING
D2
RW
Transmit Data INTERRUPT PENDING
D3
RW
Transmit Status INTERRUPT PENDING
D4
RW
Receive Data INTERRUPT PENDING
D5
RW
Receive Status INTERRUPT PENDING
D6..7
INTERRUPT PENDING Command (encoded as follows):
00
Null Command
01
Reset INTERRUPT PENDING and IUS
10
Reset INTERRUPT PENDING
11
Set INTERRUPT PENDING
2.3.14.2
High RW: (LOC 0xn1B)
D0
RW
Device Status IUS
D1
RW
I/O Status IUS
D2
RW
Transmit Data IUS
D3
RW
Transmit Status IUS
D4
RW
Receive Data IUS
D5
RW
Receive Status IUS
D6..7
IUS Command (encoded as follows):
00
Null Command
01
Null Command
10
Reset IUS
11
Set IUS
2.3.15
M
ISCELLANEOUS
I
NTERRUPT
S
TATUS
R
EGISTER
(MISR)
2.3.15.1
Low: (LOC 0xn1C)
D0
RW
BRG0 ZC Latched/Unlatch
D1
RW
BRG1 ZC Latched/Unlatch
D2
RW
DPLL SYNC Latched/Unlatch
D3
RW
RCC Overflow Latched/Unlatch
D4
RO
/CTS
D5
RW
/CTS Latched/Unlatch
D6
RO
/DCD
D7
RW
/DCD Latched/Unlatch
2.3.15.2
High: (LOC 0xn1D)
D0
RO
TxREQ
D1
RW
/TxREQ Latched/Unlatch
D2
RO
/RxREQ
D3
RW
/RxREQ Latched/Unlatch
D4
RO
/TxC
D5
RW
/TxC Latched/Unlatch
D6
RO
/RxC
D7
RW
/RxC Latched/Unlatch
2.3.16
STATUS INTERRUPT CONTROL
R
EGISTER
(SICR)