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Adding and Subtracting in Binary
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16-bit quantity addressing mode ALPHA APPLE APPLE monitor array assembly language form assembly language program BASIC statement binary number BNE LOOP branch breakpoint bytes reversed called carriage return carry flag cdab cell with address character code CLC ADC constant contains cycles decimal mode decimal number example EXERCISES FORTRAN GETLNZ hexadecimal hexadecimal digits index register indirect addressing input integer JSR COUT label LDA Q LDA T,X leftmost bit line number LISA assembler LISA program load lower half machine language form memory multiply Note nybble operation code output PL/I program counter pseudo-operation RDKEY relative address return address SEC SBC shift stack string subroutine subtract Suppose three bytes two-byte quantities unsigned upper half variable zero status flag