The Little Man Computer

Program 1 - Input and Output
INP
OUT
HLT
Program 2 - Using Memory
INP
STA FIRST
INP
STA SECOND
LDA FIRST
OUT
LDA SECOND
OUT
HLT
FIRST DAT
SECOND DAT
Program 3 - Addition and Subtraction
INP
STA FIRST
INP
ADD FIRST
OUT
INP
SUB FIRST
OUT
HLT
FIRST DAT
Program 4 - Making decisions
INP
STA FIRST
INP
STA SECOND
SUB FIRST
BRP SECONDBIG
LDA FIRST
OUT
BRA PROGRAMEND
SECONDBIG LDA SECOND
OUT 
PROGRAMEND HLT
FIRST DAT
SECOND DAT
Program 5 - Multiply two numbers
INP
STA X
INP
STA Y
LOOP LDA Y
BRZ END
LDA ANSWER
ADD X
STA ANSWER
LDA Y
SUB ONE
STA Y
BRA LOOP
END LDA ANSWER
OUT
HLT
ONE DAT 1
ANSWER DAT 0
X DAT 0
Y DAT 0