Configurable Machine State
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 20140000 = Base address*
SSCCR:
SSC Configuration Register
(2014 0010)
---------------------------------------
27: Interrupt vector disable
0 = interrupt vector enabled*
25:24: IPL Level
00 = 14*
23: ROM access time
0 = 350 ns*
22:20: ROM size
101 = 256KB
18:16:
Halt protected space
101 = 20040000 - 2007FFFF (historical)
15:
Control P enable
0 = 20 spaces recognized as break*, not control-p
(historical)
14:12: Terminal UART baud rate
101 = 9600 (historical)
6: Programmable address strobe 1 ready enable (for BDR)
1 = ready asserted after address strobe
E–8 Configurable Machine State