am79c961a Advanced Micro Devices, am79c961a Datasheet - Page 127

• Manufacturer Part Number: am79c961a
• Description: Pcnet?-isa Ii Jumperless, Full Duplex Single-chip Ethernet Controller For Isa
• Manufacturer: Advanced Micro Devices

Register Summary
Ethernet Controller Registers (Accessed via RDP Port)
Note:
Although the PCnet-ISA II controller has many registers that can be accessed by software, most of these registers are intended
for debugging and production testing purposes only. The registers with a "Y" are the only registers that should be accessed by
network software.
RAP Addr
104-105
108-109
64-65
66-67
68-69
70-71
84-85
88-89
96-97
98-99
112
114
124
126
72
74
76
78
80
82
86
92
94
CSR104
CSR108
CSR112
CSR114
CSR124
CSR126
Symbol
CSR64
CSR66
CSR68
CSR70
CSR72
CSR74
CSR76
CSR78
CSR80
CSR82
CSR84
CSR86
CSR88
CSR92
CSR94
CSR96
CSR98
Width
32-bit
32-bit
32-bit
32-bit
16-bit
16-bit
16-bit
16-bit
16-bit
16-bit
32-bit
16-bit
32-bit
16-bit
16-bit
32-bit
32-bit
32-bit
32-bit
16-bit
16-bit
16-bit
16-bit
Am79C961A
User Register
Y
Y
Y
Y
Y
Y
Y
Y
NXBA: Next XMT Buffer Address
NXBC: Next XMT Status and Byte Count
XSTMP: XMT Status Temporary
RSTMP: RCV Status Temporary
RCVRC: RCV Ring Counter
XMTRC: XMT Ring Counter
RCVRL: RCV Ring Length
XMTRL: XMT Ring Length
DMABR: Burst Register
DMABAT: Bus Activity Timer
DMABA: Address Register
DMABC: Byte Counter/Register
Chip ID Register
RCON: Ring Length Conversion Register
XMTTDR: Transmit Time Domain Reflectometry
SCR0: BIU Scratch Register 0
SCR1: BIU Scratch Register 1
SWAP:16-bit Word/Byte Swap Register
BMSCR: BMU Scratch Register
Missed Frame Count
Receive Collision Count
BMU Test Register
Reserved
Comments
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