ZiLOG Z8 User Manual page 206

Z8 Microcontrollers
Instruction Descriptions and Formats
SRP
Set Register Pointer
SRP src
Instruction Format:
Operation:
RP <— src
The specified value is loaded into the Register Pointer (RP) (Control Register FDH). Bits 7-4 determine the
Working Register Group. Bits 3-0 selects the Expanded Register Bank. Addressing of un-implemented Working
Register Group, while using Expanded Register Banks, will point to Bank 0.
Example: SRP TD addresses Working Register Group 7 of Bank 0.
Register Pointer
(FDH)
Contents (Bin)
1111 0000
1110 0000
1101 0000
1100 0000
1011 0000
1010 0000
1001 0000
1000 0000
0111 0000
0110 0000
0101 0000
0100 0000
0011 0000
0010 0000
0001 0000
0000 0000
12-66
Working
Register Group
(Hex)
F
E
D
C
B
A
9
8
7
6
5
4
3
2
1
0
SET REGISTER POINTER
Actual
Registers
(Hex)
F0-FF
E0-EF
D0-DF
C0-CF
B0-BF
A0-AF
90-9F
80-8F
70-7F
60-6F
50-5F
40-4F
30-3F
20-2F
10-1F
00-0F
UM001601-0803
ZiLOG
SRP