LMC Branching – Instructions To Implement Decisions

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The following program will demonstrate the use of the three branch instructions: BRZ, BRP and BRA.

Running the program: INPUT a number and the program will OUTPUT a sequence of numbers, starting at 1 and finishing with the INPUT number. The program will continue until a 0 is entered.

start LDA zero
STA count
INP
BRZ finish
STA maxNumber
loopTop LDA count
ADD step
STA count
OUT
SUB maxNumber
BRP endLoop
BRA loopTop
endLoop BRA . . .

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