1st method: use the instruction

CJNE A,addr,label
continue
...
label: check carry flag (JC , JNC )
.....
if the value in A is equal to value in addr then continue else go to label
and check the CY
if the value in A is less than the value in addr then CY=1.
____________
2nd method : Use SUBB

SUBB A,R1
JZ equal (if A=0 go to equal)
JC A_less_R1 (if CY=1 A<R1)
.....
....
....

equal:
....
A_less_R1:.....

build the source code (it is only some bytes ) and try it with a simulator

Good luck ..B.X