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Table 3-8. Cirrus Logic CD2401 Serial Port Memory Map (Continued)
Base Address = $FFF45000
Register Description
Modem Priority Interrupt Level Register
Modem Interrupt Register
Modem (/Timer) Interrupt Status Register
Modem End Of Interrupt Register
DMA Mode Register (write only)
Bus Error Retry Count
DMA Buffer Status
A Receive Buffer Address Lower
A Receive Buffer Address Upper
B Receive Buffer Address Lower
B Receive Buffer Address Upper
A Receive Buffer Byte Count
B Receive Buffer Byte Count
A Receive Buffer Status
B Receive Buffer Status
Receive Current Buffer Address Lower
Receive Current Buffer Address Upper
A Transmit Buffer Address Lower
A Transmit Buffer Address Upper
B Transmit Buffer Address Lower
B Transmit Buffer Address Upper
A Transmit Buffer Byte Count
B Transmit Buffer Byte Count
A Transmit Buffer Status
B Transmit Buffer Status
Transmit Current Buffer Address Lower
Transmit Current Buffer Address Upper
MVME167/D3
Register
Name
Modem Interrupt Registers
MPILR
MIR
MISR
MEOIR
DMA Registers
DMR
BERCNT
DMABSTS
DMA Receive Registers
ARBADRL
ARBADRU
BRBADRL
BRBADRU
ARBCNT
BRBCNT
ARBSTS
BRBSTS
RCBADRL
RCBADRU
DMA Transmit Registers
ATBADRL
ATBADRU
BTBADRL
BTBADRU
ATBCNT
BTBCNT
ATBSTS
BTBSTS
TCBADRL
TCBADRU
Memory Maps
Offsets
Size
Access
E3
B
R/W
EF
B
8B
B
86
B
F6
B
8E
B
R/W
19
B
42
W
R/W
40
W
R/W
46
W
R/W
44
W
R/W
4A
W
R/W
48
W
R/W
4F
B
R/W
4E
B
R/W
3E
W
3C
W
52
W
R/W
50
W
R/W
56
W
R/W
54
W
R/W
5A
W
R/W
58
W
R/W
5F
B
R/W
5E
B
R/W
3A
W
38
W
3
R
R
W
W
R
R
R
R
R
3-21
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