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MICROPROCESSOR INSTRUCTION REFERENCE->SUB

SUB     Subract Memory from Register
SUBA    
SUBB
SUBD

A <- A - M or B <- B - M or D <- D - M

Condition Code Register:

H  Undefined
N  Set if result Negative, else cleared
Z  Set if result Zero, else cleared
V  Set on overflow, else cleared
C  Set if borrow, else cleared

    
Addressing modeNo of cyclesNo of bytes
Immed.:2  (4)2  (3)
Direct:4  (6)2  (2)
Extended:5  (7)3  (3)
Index/Indirect:4+ (6+)2+ (2+)
Bracketed values refer to double accum.