User`s guide

Address Assignments
A.5 Processor Registers
Table A–1 (Cont.) Processor Registers
Number
Register
Name Mnemonic (Dec) (Hex) Type Impl Cat
I/O
Address
P0 Base
Register
P0BR 8 8 RW NVAX 1-2
P0 Length
Register
P0LR 9 9 RW NVAX 1-2
P1 Base
Register
P1BR 10 A RW NVAX 1-2
P1 Length
Register
P1LR 11 B RW NVAX 1-2
System
Base
Register
SBR 12 C RW NVAX 1-2
System
Length
Register
SLR 13 D RW NVAX 1-2
CPU
Identification
CPUID 14 E RW NVAX 2-1
Reserved 15 F 3 E100003C
Process
Control
Block Base
PCBB 16 10 RW NVAX 1-1
System
Control
Block Base
SCBB 17 11 RW NVAX 1-1
Interrupt
Priority
Level
1
IPL 18 12 RW NVAX 1-1
AST Level
1
ASTLVL 19 13 RW NVAX 1-1
Software
Interrupt
Request
Register
SIRR 20 14 W NVAX 1-1
1
Initialized on reset
(continued on next page)
A–10 Address Assignments