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data
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MCS-48™
INSTRUCTION
SET
SYMBOLS AND ABBREVIATIONS USED
Accumulator
Auxiliary
Carry
12-Bit Program Memory Address
Bit Designator (b=0-7)
Bank
Switch
BUS
Port
Carry
Clock
Event
Counter
Conversion Result Register
Mnemonic
for
4-Bit
Digit
(Nibble)
8-Bit
Number
or
Expression
Memory
Bank Flip-Flop
Flag
0,
Flag 1
Interrupt
Mnemonic
for
"in-page"
Operation
Program
Counter
Port Designator (p=1, 2
or
4-7)
Program
Status Word
Register Designator
(r=O,
1
or
0-7)
Stack
Pointer
Timer
Timer
Flag
Test
0,
Test 1
Mnemonic
for
External RAM
Immediate Data Prefix
Indirect
Address Prefix
Current
Value
of
Program
Counter
Contents
of
X
Contents
of
location
Addressed by X
Is Replaced by
Mnemonics
copyright
Intel
Corporation
1976.
4-8