MC6800 Motorola, MC6800 Datasheet - Page 22

• Manufacturer Part Number: MC6800
• Description: 8-BIT MICROPROCESSING UNIT (MPU)
• Manufacturer: Motorola

L
via the..~t~~~?{~us.
eithe&~{~~@:or
w@.@/~,~s
actloh
8-bit word
from
more than
The
tions.
ha$~~tinique
program
MPU’S internal
user as the source
The M P&%~&$ates
These addressing
Selection
programmer
the fact that
on 197 of the 256 possibilities
causes the MPU to obtain
length.
one addressing
encountered
of the desired
instructions,
an instruction
registers
must
This larger number
many
statements
A given
modes
on 8-bit binary numbers
@
have a method
and all of the external
in the control
of the executive
mode.
addressing
however,
refer to the manner
to be executed,
number
are written.
MOTOROLA
its instructions
that can occur
it recognizes
(byte)
of instructions
mode
program.
for addressing
instructions
Translation
is made
may
presented
depending
memory
in which
The Mm
and takes
and data.
rePresent
using an
results
by the
have
loca-
to it
into
the
the
on
E
=
1
1
1
1
1
1
1
1
22
Semiconductor
BOOLEAN
appropriate
manual
in the opcode.
and Extended
tion.
adecimal
tion
generate
selected
symbol
field
the mnemonic
to determine
Relative
A+CCR
CCR+A
The source
O+c
O+v
l+C
l-v
0+1
1+1
OPERATION
for the
causes
The
in the operand
translation
mode applies to the branch instructions,
by the Assembler
notation)
the opcode.
proper
opcode
selection
the
addressing
modes
statement
m
For example,
instruction
HI
CO ND. COOE
Indexed
00m*
R****
.mm
Ore**
S.
**O
mode
Products Inc. ~
is used, the addressing
8B, 9B, AB,
then
may all be used with
NZVC
For instance,
field.
if an assembler
w
\*
format
mode.
*Q.
is determined
depends
itself is enough for the Assembler
mode
REG.
whenever
the immediate,
Similarly,
R.
s.
R
s
or BB, respectively.
includes
to
on the method
the Immediate
be selected.
an “X”
it encounters
program
by selecting
adequate
the ADD instruc-
mode
Direct,
in the operand
is inherent
is used to
therefore,
Only
Indexed,
informa-
mode
used.
the “#”
(hex-
the
is
If
—.