MPU-3
5.One condition code register (CC)
6.72 instructions
7.Five addressing modes
8.System clock range of 100 kilohertz to 1 megahertz
9.Program interrupt capability
Accumulators
The MPU contains 2 accumulators designated ACCA and ACCB. Each accumulator is 8 bits (one byte) long and is used to hold operands and data from the arithmetic logic unit. Instructions which involve one or both accumulators are:
ABA - Add accumulator A to accumulator B
ADC - Add with carry
ADD - Add without carry
AND - Logical AND
ASL - Arithmetic shift left
ASR - Arithmetic shift right
BIT - Bit test
CBA - Compare accumulators
CLR - Clear
CMP - Compare
COM - Complement
DAA - Decimal adjust ACCA
DEC - Decrement
EOR - Exclusive OR
