User`s guide

Configurable Machine State
NICSR6: Command and Mode Register (2000 8018)
30: Interrupt enable
0 = disabled*
28:25: Burst limit mode
maximum number of longwords transferred in a single DMA
burst. 1*,2,4,8 when NICSR<19>is clear; 1*,4 when set.
20: Boot message enable mode
0 = disabled*
19: Single cycle enable mode
0 = disabled*
11: Start/Stop transmission command
0 = SGEC transmission process in stopped state*
10: Start/Stop reception command
0 = SGEC reception process in stopped state*
9:8: Operating mode
00 = normal mode*
7: Disable data chaining mode
0 = frames too long for current receive buffer will be
transferred to the next buffer(s) in receive list*
6: Force collision mode (internal loopback mode only)
0 = no collision*
3: Pass bad frames mode
0 = bad frames discarded*
2:1: Address filtering mode
00 = normal mode*
NICSR7: System Base Register (2000 801C)
29:0: System base address - physical starting address of the
VAX system page table (unpredictable after reset)
NICSR9: Watchdog Timers Register (2000 8024)
31:16: Receive watchdog timeout
0 = never timeout*
default = 1250 = 2 ms
range = 72 µs (45) to 100 ms
15:0: Transmit watchdog timeout
0 = never timeout*
default = 1250 = 2 ms
range = 72 µs (45) to 100 ms
SSC:
----
SSCBAR: SSC Base Address Register (2014 0000)
29:0 Base Address (reset value = 20140000)
SSCCR: SSC Configuration Register (2014 0010)
27: Interrupt vector disable
0 = interrupt vector enabled*
25:24: IPL Level
00 = 14*
Configurable Machine State D–7