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FUNDAMENTALS OF 16BIT
INTRODUCTION TO THE 68000
THE 68000 INSTRUCTION SET
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ACIA address bus address lines address mode address register assembler BERR buffers bus cycle bus error byte causes chip select circuit clock command Condition Codes contents control register coprocessor Courtesy of Motorola data bus data cache data register data transfer decoder decremented descriptor destination display DTACK effective address Enable EPROM example exception routine executed fetched Figure flag floating point index register indicates initially input interface interrupt acknowledge interrupt mask interrupt request keyboard loaded location $00 logical address long word loop lower word memory location memory management unit microprocessor Motorola MOVE.W occurs opcode operand operation output parity peripheral port processor program counter pulse Receive Data reset otherwise result sign extended signal stack pointer status register stored subroutine subtraction supervisor Table timer translation transmit vector voltage word Syntax zero