am79c961 Advanced Micro Devices, am79c961 Datasheet - Page 101

• Manufacturer Part Number: am79c961
• Description: Pcnettm-isa Jumperless Single-chip Ethernet Controller For Isa
• Manufacturer: Advanced Micro Devices

Register Summary
Ethernet Controller Registers
(Accessed via RDP Port)
RAP Addr
16-17
18-19
20-21
22-23
24-25
26-27
28-29
30-31
32-33
34-35
36-37
38-39
40-41
42-43
44-45
48-49
50-51
52-53
54-55
56-57
58-59
60-61
62-63
00
01
02
03
04
05
06
07
08
09
10
11
12
13
14
15
46
47
Symbol
CSR10
CSR11
CSR12
CSR13
CSR14
CSR15
CSR16
CSR18
CSR20
CSR22
CSR24
CSR26
CSR28
CSR30
CSR32
CSR34
CSR36
CSR38
CSR40
CSR42
CSR44
CSR46
CSR47
CSR48
CSR50
CSR52
CSR54
CSR56
CSR58
CSR60
CSR62
CSR0
CSR1
CSR2
CSR3
CSR4
CSR5
CSR6
CSR7
CSR8
CSR9
Width
16-bit
16-bit
16-bit
16-bit
16-bit
16-bit
16-bit
16-bit
16-bit
16-bit
16-bit
16-bit
16-bit
16-bit
16-bit
16-bit
32-bit
32-bit
32-bit
32-bit
32-bit
32-bit
32-bit
32-bit
32-bit
32-bit
32-bit
32-bit
32-bit
32-bit
32-bit
16-bit
32-bit
32-bit
32-bit
32-bit
32-bit
32-bit
32-bit
32-bit
32-bit
P R E L I M I N A R Y
Am79C961
Register
User
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
PCnet-ISA
Lower IADR: maps to location 16
Upper IADR: maps to location 17
Mask Register
Miscellaneous Register
Reserved
RXTX: RX/TX Encoded Ring Lengths
Reserved
LADR0: LADRF[15:0]
LADR1: LADRF[31:16]
LADR2: LADRF[47:32]
LADR3: LADRF[63:48]
PADR0: PADR[15:0]
PADR1: PADR[31:16]
PADR2: PADR[47:32]
MODE: Mode Register
IADR: Base Address of INIT Block
CRBA: Current RCV Buffer Address
CXBA: Current XMT Buffer Address
NRBA: Next RCV Buffer Address
BADR: Base Address of RCV Ring
NRDA: Next RCV Descriptor Address
CRDA: Current RCV Descriptor Address
BADX: Base Address of XMT Ring
NXDA: Next XMT Descriptor Address
CXDA: Current XMT Descriptor Address
Next Next Receive Descriptor Address
Next Next Transmit Descriptor Address
CRBC: Current RCV Stat and Byte Count
CXBC: Current XMT Status and Byte Count
NRBC: Next RCV Stat and Byte Count
POLL: Poll Time Counter
Polling Interval
TMP0: Temporary Storage
TMP1: Temporary Storage
TMP2: Temporary Storage
TMP3: Temporary Storage
TMP4: Temporary Storage
TMP5: Temporary Storage
PXDA: Previous XMT Descriptor Address
PXBC: Previous XMT Status and Byte Count
+
controller status
Comments
AMD
1-575