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CHAPTER 7 DETAILED EXECUTION INSTRUCTIONS
7.130 LDM1 (Load Multiple Registers)
The LDM1 instruction accepts registers in the range R8 to R15 as members of the
parameter "reglist" (See Table 7.130-1.).
Registers are processed in ascending numerical order.
If "R15" is specified in the parameter "reglist", the final contents of "R15" will be read
from memory.
■ LDM1 (Load Multiple Registers)
Assembler format: LDM1 (reglist)
Operation: The following operations are repeated according to the number of registers specified in the
parameter "reglist".
(R15) → Ri
R15 + 4 → R15
Flag change:
N, Z, V, and C: Unchanged
Execution cycles: If "n" is the number of registers specified in the parameter "reglist", the execution cycles
required are as follows.
If n=0: 1 cycle
For other values of n: a (n – 1) + b + 1 cycles
Instruction format:
NZVC
––––
MSB LSB
10001101
reglist