INSTRUCTION DESCRIPTIONS
A - 132 INSTRUCTION SET DETAILS MOTOROLA
Instruction Format:
JSET #n,X:ea,xxxx
JSET #n,Y:ea,xxxx
Opcode:
Instruction Fields:
#n=bit number=bbbbb,
ea=6-bit Effective Address=MMMRRR
xxxx=16-bit Absolute Address in extension word
Effective
Addressing Mode M M M R R R Memory SpaceS Bit Number bbbbb
(Rn)-Nn 0 0 0 r r r X Memory 0 00000
(Rn)+Nn 0 0 1 r r r Y Memory 1 •
(Rn)- 0 1 0 r r r •
(Rn)+ 0 1 1 r r r •
(Rn) 1 0 0 r r r 10111
(Rn+Nn) 1 0 1 r r r
-(Rn) 1 1 1 r r r
where “rrr” refers to an address register R0-R7
Timing: 6+jx oscillator clock cycles
Memory: 2 program words
23 16 15 8 7 0
ABSOLUTE ADDRESS EXTENSION
00001010 01MMMRRR1S1bbbbb
JSET Jump if Bit Set