ZiLOG eZ80 User Manual

eZ80
®
CPU
User Manual
UM007714-0908 CPU Instruction Set
77
eZ80
®
CPU Instruction Set Description
The following pages provide detailed descriptions of the assembly language instructions
available with the eZ80
®
CPU. Some CPU-based products may not support all instruc-
tions, registers, operating modes, etc. Refer to the eZ80
®
and eZ80Acclaim!
®
product
specifications for information on CPU usage. The instruction set descriptions on the fol-
lowing pages are organized alphabetically by mnemonic.
eZ80
®
CPU Instruction Cycle Times
The instruction execution cycle time information provided for each of the following CPU
instructions refers to the bus cycles required to execute the instruction. This cycle time
information appears in the Attributes tables under the heading
Cycle . The number of clock
SUB A,s
A ←
A – s
(HL) 96 *** V 1*
ir DD/FD 94-95
(IX/Y+d) DD/FD 96 dd
n D6
r 90-97
TST A,s
A AND s
(HL) ED 34 **1 P 00
n ED 64
r ED 04-3C
TSTIO n
{0000h, C} AND n
ED 74 **1 P 00
XOR A,s
A ←
A XOR s
(HL) AE **0 P 00
ir DD/FD AC–AD
(IX/Y+d) DD/FD AE dd
n EE
r A8-AF
Table 37. Instruction Summary (Continued)
Instruction and Operation
Address Mode
Opcode(s)
(Hex)
Flags Affected
Dest Source S Z H P/V N C
Note: *This flag value is a function of the result of the affected operation.
— = No Change.
0 = Set to 0.
1 = Set to 1.
V = Set to 1 if overflow occurs.
X = Undetermined.
P = Set to the parity of the result (0 if odd parity, 1 if even parity).
IEF2 = The value of Interrupt Enable Flag 2.

ZiLOG eZ80 Specifications

General

Brand	ZiLOG
Model	eZ80
Category	Computer Hardware
Language	English