User`s guide

Address Assignments
A.4 Global Q22–bus Address Space Map
A.4 Global Q22–bus Address Space Map
Q22-bus Memory Space
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Q22-bus Memory Space (Octal) 0000 0000 - 1777 7777
Q22-bus I/O Space (BBS7 Asserted)
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Q22-bus I/O Space (Octal) 1776 0000 - 1777 7777
Reserved Q22-bus I/O Space 1776 0000 - 1776 0007
Q22-bus Floating Address Space 1776 0010 - 1776 3777
User Reserved Q22-bus I/O Space 1776 4000 - 1776 7777
Reserved Q22-bus I/O Space 1777 0000 - 1777 7477
Interprocessor Comm Reg 1777 7500
Reserved Q22-bus I/O Space 1777 7502 - 1777 7777
A.5 Processor Registers
Table A–1 Processor Registers
Number
Register
Name Mnemonic (Dec) (Hex) Type Impl Cat
I/O
Address
Kernel
Stack
Pointer
KSP 0 0 RW NVAX 1-1
Executive
Stack
Pointer
ESP 1 1 RW NVAX 1-1
Supervisor
Stack
Pointer
SSP 2 2 RW NVAX 1-1
User Stack
Pointer
USP 3 3 RW NVAX 1-1
Interrupt
Stack
Pointer
ISP 4 4 RW NVAX 1-1
Reserved 5–7 5 3 E1000014
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Address Assignments A–9