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
Software
Interrupt
Summary
Register
1
SISR 21 15 RW NVAX 1-1
Reserved 22–23 16 3 E1000058
Interval
Counter
Control
/Status
ICCS 24 18 RW NCA 2-7 E1000060
Next
Interval
Count
NICR 25 19 RW NCA 3-7 E1000064
Interval
Count
ICR 26 1A RW NCA 3-7 E1000068
Time
of Year
Register
TODR 27 1B RW SSC 2-3 E100006C
Console
Storage
Receiver
Status
CSRS 28 1C RW SSC 2-3 E1000070
Console
Storage
Receiver
Data
CSRD 29 1D R SSC 2-3 E1000074
Console
Storage
Transmitter
Status
CSTS 30 1E RW SSC 2-3 E1000078
Console
Storage
Transmitter
Data
CSTD 31 1F W SSC 2-3 E100007C
1
Initialized on reset
(continued on next page)
Address Assignments A–11