INSTRUCTION DESCRIPTIONS
MOTOROLA INSTRUCTION SET DETAILS A - 205
S1 D1 D1 Y Effective
Register w S1, D1 e e S/L Sign Ext Zero Addressing Mode mm r r
Read S1 0 X0 0 0 no no no (Rn) +Nn 0 1 t t
Write D1 1 X1 0 1 no no no (Rn) - 1 0 t t
A 1 0 yes A2 A0 (Rn) + 1 1 t t
B 1 1 yes B2 B0 (Rn) 0 0 t t
where “tt” refers to an address register R4 - R7 or R0 - R3 which is in the opposite
address register bank from the one used in the X effective address, previously described
S2 D2 D2
Register W S2, D2 f f S/L Sign Ext Zero
Read S2 0 Y0 0 0 no no no
Write D2 1 Y1 0 1 no no no
A 1 0 yes A2 A0
B 1 1 yes B2 B0
Timing: mv oscillator clock cycles
Memory: mv program words
X: Y: XY Memory Data Move X: Y: