7.0 8-BITS, 16-BITS AND 32-BITS MICROPROCESSOR GENEOLOGY
8086 16-BIT MICROPROCESSOR PROGRAMMING MODEL
68000(68K) 16-BIT MICROPROCESSOR PROGRAMMING MODEL
8086 16-BIT MICROPROCESSOR •The 8086 was the first 16-bit microprocessor introduced by Intel. •The 8086 use 9 (nine) Addressing Modes to perform on data, memory and I/O. devices.
The 8086 Main Register •4 (four) general-purpose register labeled AX, BX, DX and DX. •The Indexed Registers •The Instruction Pointer •The Status Register •
8086 ADDRESSING MODES 1.Immediate Mode 2.Register addressing 3.Direct addressing 4.Register indirect addressing 5.Based Addressing 6.Indexed Addressing 7.Based Indexed Addressing 8.String Addressing 9.I/O Addressing Modes
68000 16-BIT MICROPROCESSOR •The 68000 was the first developed and marketed by Motorola in late 1970s. •The 8086 use 9 (nine) Addressing Modes to perform on data, memory and I/O. devices.
The 8086 Main Register •4 (four) general-purpose register labeled AX, BX, DX and DX. •The Indexed Registers •The Instruction Pointer •The Status Register •
8086 ADDRESSING MODES 1.Immediate Mode 2.Register addressing 3.Direct addressing 4.Register indirect addressing 5.Based Addressing 6.Indexed Addressing 7.Based Indexed Addressing 8.String Addressing 9.I/O Addressing Modes