Installation guide

Registers 1-11
Table 1-3 KA7AA Internal Processor Registers
Mnemonic Register Name
Address
Dec Hex Type
KSP
Kernel Stack Pointer 0 0 R/W
ESP
Executive Stack Pointer 1 1 R/W
SSP
Supervisor Stack Pointer 2 2 R/W
USP
User Stack Pointer 3 3 R/W
ISP
Interrupt Stack Pointer 4 4 R/W
P0BR
P0 Base 8 8 R/W
P0LR
P0 Length 9 9 R/W
P1BR
P1 Base 10 A R/W
P1LR
P1 Length 11 B R/W
SBR
System Base 12 C R/W
SLR
System Length 13 D R/W
CPUID
CPU Identification
1
14 E R/W
PCBB
Process Control Block Base 16 10 R/W
SCBB
System Control Block Base 17 11 R/W
IPL
Interrupt Priority Level
1
18 12 R/W
ASTLVL
AST Level
1
19 13 R/W
SIRR
Software Interrupt Request 20 14 WO
SISR
Software Interrupt Summary
1
21 15 R/W
ICCS
Interval Clock Control/Status
1
24 18 R/W
NICR
Next Interval Count 25 19 WO
ICR
Interval Count 26 1A RO
TODR
Time-of-Day 27 1B R/W
MCESR
Machine Check Error Summary 38 26 WO
SAVPC
Console Saved PC 42 2A RO
SAVPSL
Console Saved PSL 43 2B RO
1
Initialized on reset.