eZ80
®
CPU
User Manual
UM007714-0908 CPU Instruction Set
268
OUT (BC), r—also OUT (C), r for Z80 compatibility
Output to I/O
Operation
({UU, BC[15:0]}) ← r
Description
The
r
operand is any of the A, B, C, D, E, H, and L registers. The CPU outputs the con-
tents of this byte of the specified register to the I/O address {UU, BC[15:0]}. The upper
byte of the address bus, ADDR[23:16] is undefined for I/O addresses.
Condition Bits Affected
None.
Attributes
jj identifies the A, B, C, D, E, H, or L register and is assembled into one of the opcodes
indicated in Table 76.
Mnemonic Operand ADL Mode Cycle Opcode (hex)
OUT (BC),r X3ED, jj
Table 76. Register and jj Opcodes for OUT (BC), r and OUT (C), r
Instructions (hex)
Register jj
A 79
B 41
C 49
D 51
E 59
H 61
L 69
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