am79c974 Advanced Micro Devices, am79c974 Datasheet - Page 114

• Manufacturer Part Number: am79c974
• Description: Pcnettm-scsi Combination Ethernet And Scsi Controller For Pci Systems
• Manufacturer: Advanced Micro Devices

Control and Status Registers (continued)
114
RAP Addr
AMD
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
Symbol
CSR22
CSR23
CSR24
CSR25
CSR26
CSR27
CSR28
CSR29
CSR30
CSR31
CSR32
CSR33
CSR34
CSR35
CSR36
CSR37
CSR38
CSR39
CSR40
CSR41
CSR42
CSR43
CSR44
CSR45
CSR46
CSR47
CSR48
CSR49
CSR50
CSR51
CSR52
CSR53
CSR54
CSR55
CSR56
CSR57
CSR58
CSR59
CSR60
CSR61
CSR62
CSR63
CSR64
Default Value
see reg. desc.
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H_RESET
After
P R E L I M I N A R Y
NRBAL: Next RCV Buffer Address Lower
NRBAU: Next RCV Buffer Address Upper
BADRL: Base Address of RCV Ring Lower
BADRU: Base Address of RCV Ring Upper
NRDAL: Next RCV Descriptor Address Lower
NRDAU: Next RCV Descriptor Address Upper
CRDAL: Current RCV Descriptor Address Lower
CRDAU: Current RCV Descriptor Address Upper
BADXL: Base Address of XMT Ring Lower
BADXU: Base Address of XMT Ring Upper
NXDAL: Next XMT Descriptor Address Lower
NXDAU: Next XMT Descriptor Address Upper
CXDAL: Current XMT Descriptor Address Lower
CXDAU: Current XMT Descriptor Address Upper
NNRDAL: Next Next Receive Descriptor Address Lower
NNRDAU: Next Next Receive Descriptor Address Upper
NNXDAL: Next Next Transmit Descriptor Address Lower
NNXDAU: Next Next Transmit Descriptor Address Upper
CRBC: Current RCV Byte Count
CRST: Current RCV Status
CXBC: Current XMT Byte Count
CXST: Current XMT Status
NRBC: Next RCV Byte Count
NRST: Next RCV Status
POLL: Poll Time Counter
POLLINT: Polling Interval
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
SWS: Software Style
IR: IR Register
PXDAL: Previous XMT Descriptor Address Lower
PXDAU: Previous XMT Descriptor Address Upper
PXBC: Previous XMT Byte Count
PXST: Previous XMT Status
NXBA: Next XMT Buffer Address Lower
Am79C974
Comments
Use
T
T
S
S
T
T
T
T
S
S
T
T
T
T
T
T
T
T
T
T
T
T
T
T
T
S
T
T
T
T
T
T
T
T
T
T
S
T
T
T
T
T
T