Samsung S3F80JB - Manual (Page 58)

S3F80JB ADDRESSING MODES
3-5
INDIRECT REGISTER ADDRESSING MODE (Continued)
dst
OPCODE ADDRESS
4-bit
Working
Register
Address
Point to the
Woking Register
(1 of 8)
Sample Instruction:
OR R3, @R6
Program Memory
Register File
src
3 LSBs
Value used in
instruction
OPERAND
Selected
RP points
to start of
woking register
block
RP0 or RP1
MSB Points to
RP0 or RP1
~ ~
~ ~
Figure 3-5. Indirect Working Register Addressing to Register File