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BASIC COMPUTER STRUCTURE AND THE MC6809
THE INSTRUCTION SET
8 other sections not shown
accumulator ACIA ADCA ADDA ADDD addressing modes arithmetic ASCII assembly language assembly language program binary buffer calling sequence carry bit chapter character clock cycle code byte condition code bits condition code register contents coroutine data structure DECB decimal deque device direct addressing discussed dot product DOTPRD effective address example executed exponent Figure floating-point numbers global variables hardware hexadecimal high byte index addressing index register input input/output instruction set integers interrupt handler label LBSR LEAS LEAX load loop low byte machine code macro memory locations microcomputer microprocessor mnemonics Motorola multiply NBYTES offset operand operation overflow passing parameters program counter program segment PSHS PULS push queue representation result return address signed significand stack marker stack pointer stored string subroutine subtract technique TRS-80 Color Computer two's-complement unsigned number vector word write zero