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Program Description
In the above program any two numbers can be stored in register A and B ( by replacing XX and YY).
Contents of B are compared with A. If B CY = 0 (reset) and if Z < B CY= 1 (set)
JNC SKIP instruction will check CY flag if CY is not it will jump to location 2009H otherwise execution will come to next location 2008H.
I e MOV A, B instruction will be executed only when CY is set which is the case when B is greater than A this instruction will copy the contents of B into A when B is greater.
OUT 01 instruction always send the contents of A to the specified output port. In the above program A will always hold the greater number before coming to this statement. Hence greater number will be displayed at port address 01H.
DCR Decrement Instruction This instruction is used to decrement the contents of any register or memory location by one. There are two formats.
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