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Register Summary 10-3
ICCR Instruction Cache Cachability Register 1019 0x3FB 0x37F Read/Write
ICDBDR Instruction Cache Debug Data Register 979 0x3D3 0x27E Read-only
LR Link Register 8 0x008 0x100 Read/Write
PID Process ID 945 0x3B1 0x23D Read/Write
PIT Programmable Interval Timer 987 0x3DB 0x37E Read/Write
PVR Processor Version Register 287 0x11F 0x3E8 Read-only
SGR Storage Guarded Register 953 0x3B9 0x33D Read/Write
SLER Storage Little Endian Register 955 0x3BB 0x37D Read/Write
SPRG0 SPR General 0 272 0x110 0x208 Read/Write
SPRG1 SPR General 1 273 0x111 0x228 Read/Write
SPRG2 SPR General 2 274 0x112 0x248 Read/Write
SPRG3 SPR General 3 275 0x113 0x268 Read/Write
SPRG4 SPR General 4 260 0x104 0x088 Read-only
SPRG4 SPR General 4 276 0x114 0x288 Read/Write
SPRG5 SPR General 5 261 0x105 0x0A8 Read-only
SPRG5 SPR General 5 277 0x115 0x2A8 Read/Write
SPRG6 SPR General 6 262 0x106 0x0C8 Read-only
SPRG6 SPR General 6 278 0x116 0x2C8 Read/Write
SPRG7 SPR General 7 263 0x107 0x0E8 Read-only
SPRG7 SPR General 7 279 0x117 0x2E8 Read/Write
SRR0 Save/Restore Register 0 26 0x01A 0x340 Read/Write
SRR1 Save/Restore Register 1 27 0x01B 0x360 Read/Write
SRR2 Save/Restore Register 2 990 0x3DE 0x3DE Read/Write
SRR3 Save/Restore Register 3 991 0x3DF 0x3FE Read/Write
SU0R Storage User-defined 0 Register 956 0x3BC 0x39D Read/Write
TBL Time Base Lower 284 0x11C 0x388 Write-only
TBU Time Base Upper 285 0x11D 0x3A8 Write-only
TCR Timer Control Register 986 0x3DA 0x35E Read/Write
TSR Timer Status Register 984 0x3D8 0x31E Read/Clear
USPRG0 User SPR General 0 256 0x100 0x008 Read/Write
XER Fixed Point Exception Register 1 0x001 0x020 Read/Write
ZPR Zone Protection Register 944 0x3B0 0x21D Privileged
Table 10-2. Special Purpose Registers (continued)
Mnemonic Register Name
SPRN
SPRF AccessDecimal Hex