Instruction set, Register, Table 32 – Zilog Z80180 User Manual
Page 223: Register values
Z8018x
Family MPU User Manual
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Instruction Set
This section explains the symbols in the instruction set.
REGISTER
g, g', ww, xx, yy, and zz specify a register to be used. g and g' specify an
8-bit register. ww, xx, yy, and zz specify a pair of 8-bit registers. Table 32
describes the correspondence between symbols and registers.
Note: Suffixed H and L to ww, xx, yy, zz (ex. wwH, IXL) indicate upper and lower
8-bit of the 16-bit register respectively.
BIT
b specifies a bit to be manipulated in the bit manipulation instruction.
Table 33 indicates the correspondence between b and bits.
Table 32. Register Values
g,g' Reg.
ww Reg.
xx
Reg.
yy
Reg.
zz
Reg.
000 B
00
BC
00
BC
00
BC
00
BC
001 C
01
DE
01
DE
01
DE
01
DE
010 D
10
HL
10
IX
10
IY
10
HL
011 E
11
SP
11
SP
11
SP
11
AF
100 H
101 L
111
A