Reference Manual

PMAC 2 Software Reference
PMAC I/0 and Memory Map 397
PMAC Memory Mapping
$0000
$00FF
$0100
$17FF
$1800
$BBFF
$BC00
$BFFF
$C000
$C03F
$D000
$DFFF
$E000
$F000
$FFFF
Internal DSP
Memory
DSP-Gate
Registers
Dual-Ported
RAM
VME bus
registers
I/O
Registers
External
Static
RAM
(Battery
Backed)
X-Memory Y-Memory
823 16 15 7 0 23 16 15 8 7 0
Fixed-Use Calculation Registers
User Buffer Storage Space
User-Written Servo Storage
M-Variable Definitions
Mailbox Registers
VME Setup Registers
Global Servo Calculation Registers
In the listing below, the hexadecimal address is listed first, followed by the decimal address in
parentheses.
Bits Global I-Variables
X:$0000 (0)
Servo interrupt cycle counter (servo cycles)
Y:$0000
Servo count for next real time interrupt
X:$0001 (1)
0,1 I5
2 I2
4,5 I9
6,7 I3
10,11 I4
14,15 I6
18,19 I1