Samsung KS57C2308 Manual page 143

KS57C2308/P2308/C2316/P2316
LDI
— Load Data Memory and Increment
LDI dst,src
Operation: Operand
A,@HL
Description: The contents of a data memory location are loaded into the accumulator, and the contents of the
register L are incremented by one. If an overflow occurs (e.g., if the resulting value in register L
is 0H), the next instruction is skipped. The contents of data memory and the carry flag value are
not affected.
Operand
A,@HL
Example: Assume that register pair HL contains the address 2FH and internal RAM location 2FH contains
the value 0FH:
LD
LDI
JPS
JPS
The instruction "JPS XXX" is skipped since an overflow occurred after the "LDI A,@HL" and the
instruction "JPS YYY" is executed.
Operation Summary
Load indirect data memory to A; increment register L
contents and skip on overflow
Binary Code
1 0 0
HL,#2FH
A,@HL
XXX
YYY
0 1 0 1 0
; A (HL) and L
; Skip
; H 2H and L
SAM47 INSTRUCTION SET
Bytes
1
Operation Notation
A (HL), then L
skip if L = 0H
L+1
0H
Cycles
2 + S
L+1;
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