Input and Output

Input a character

CIF, SKI ; Check input flag BUN CIF ; Flag is 0, branch to check again INP ; Flag is 1, input character OUT ; Output the character STA CHR ; Store the input character in location CHR HLT ; Halt the program

CHR, DEC 0 ; Memory location to store the input character

END ; End of symbolic program

Output a character

LDA CHR ; Load the character from location CHR into the accumulator COF, SKO ; Check the output flag BUN COF ; Flag is 0, branch to check again OUT ; Flag is 1, output the character HLT ; Halt the program

CHR, HEX 0057 ; Memory location to store the character to be output (ASCII value for 'W')

END ; End of symbolic program