EasyManuals Logo

ZiLOG Z8 Technical Manual

ZiLOG Z8
166 pages
To Next Page IconTo Next Page
To Next Page IconTo Next Page
To Previous Page IconTo Previous Page
To Previous Page IconTo Previous Page
Page #60 background imageLoading...
Page #60 background image
JR
Jump Relative
JR
cc,dst
Instruction
Foraat:
Cycles
OPC
(Hex)
Address
Mode
dot
~
__
cc
____
~
__
O_p_C
__
~1
I~
______
d_s_t
______
~
12
If
jump
taken
ccB
10
If
jump
not
taken
RA
Operation:
Flags:
Example:
5-26
cc=O
to
F
If
cc
is
true,
PC
<--
PC
+
dst
If
the
condition
specified
by
"cc"
is
true,
the
relative
address
is
added
to
the
PC
and
control
passes
to
the
statement
whose
address
in
now
in
the
PC;
otherwise,
the
instruction
following
the
JR
instruction
is
executed.
(See
Section
5.3
for
a
list
of
condition
codes).
The
range
of
the
relative
address
is
+127,
-128,
and
the
original
value
of
the
PC
is
taken
to
be
the
address
of
the
first
instruction
byte
following
the
JR
statement.
No
flags
affected
If
the
result
of
the
last
arithmetic
operation
executed
is
negative,
the
following
four
statements
(which occupy a
total
of
seven
bytes)
are
skipped
with
the
statement
JR
MI,$+9
If
the
result
is
not
negative,
execution
continues
with
the
statement
following
the
JR.
A
short
form
of
a
jump
to
label
LO
is
JR
LO
where
LO
must be
within
the
allowed
range.
The
condition
code
is
"blank"
in
this
case,
and
is
assumed
to
be
"always
true."

Table of Contents

Other manuals for ZiLOG Z8

Questions and Answers:

Question and Answer IconNeed help?

Do you have a question about the ZiLOG Z8 and is the answer not in the manual?

ZiLOG Z8 Specifications

General IconGeneral
BrandZiLOG
ModelZ8
CategoryDesktop
LanguageEnglish

Related product manuals