1) Add (B) - Hitachi H8/300H Series Programming Manual

2.2.1 (1) ADD (B)

ADD (ADD binary)
Operation
Rd + (EAs) → Rd
Assembly-Language Format
ADD.B <EAs>, Rd
Operand Size
Byte
Description
This instruction adds the source operand to the contents of an 8-bit register Rd (destination
operand) and stores the result in the 8-bit register Rd.
Available Registers
Rd: R0L to R7L, R0H to R7H
Rs: R0L to R7L, R0H to R7H
Operand Format and Number of States Required for Execution
Addressing
Mnemonic
Mode
Immediate ADD.B
Register direct ADD.B
Notes
Operands
1st byte
#xx:8, Rd 8 rd
Rs, Rd 0 8
42
Condition Code
I UI H U
— — —
H: Set to 1 if there is a carry at bit 3;
otherwise cleared to 0.
N: Set to 1 if the result is negative; otherwise
cleared to 0.
Z: Set to 1 if the result is zero; otherwise
cleared to 0.
V: Set to 1 if an overflow occurs; otherwise
cleared to 0.
C: Set to 1 if there is a carry at bit 7;
otherwise cleared to 0.
Instruction Format
2nd byte 3rd byte
IMM
rs rd
Add Binary
N Z V C
No. of
States
4th byte
2
2