Motorola 68000

68000 Stack and Queue

68000 Stack and Queue: 68000 Stack and Queue – 68000 supports stack and queue data structures with the address register indirect position direct and predecrement addressing modes. A stack operates on the principle of Last In First Out (LIFO) and, queue operates on the principle of First In First Out (FIFO). When data is added …

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Motorola 68000 Instruction Set

Motorola 68000 Instruction Set: There are actually 56 basic instructions provided in the Motorola 68000 Instruction Set. With 14 addressing modes, 56 instructions, and 5 data types, the 68000 includes more than 1000 opcodes. The basic format of all the instructions is same. The opcode for every instruction is one word. Additional extension words are …

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68000 Addressing Modes

68000 Addressing Modes: 68000 utilizes 14 different 68000 Addressing Modes which can be grouped into 6 basic types. These are 1.Direct Register Addressing a)Data Register Direct b)Address Register Direct 2.Direct Memory Addressing a)Absolute short b)Absolute long. 3.Indirect Memory Addressing a)Register Indirect b)Post-increment Register Indirect c)Pre-decrement Register Indirect d)Register Indirect with Displacement e)Register Indirect with Index …

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Motorola 68000 Pins and Signals

Motorola 68000 Pins and Signals: Fig. 11.3 illustrates the Motorola 68000 Pins and Signals. Data Transfer Control and Address Lines: D0-D15 is the bi-directional 16-bit data bus. A1-A23 is the output 24-bit address bus. The UDS (Upper Data Strobe) and LDS (Lower Data Strobe) signals determine whether data is being transferred on either the upper (most …

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Motorola 68000 Features

Motorola 68000 Features: The Motorola 68000 microprocessor is Motorola’s first 16-bit microprocessor. The 68000 is not program compatible with Motorola’s family of 8-bit microprocessors. For the designing of instruction set the Motorola has given more trace on its powerfulness and simplicity rather than compatibility. The Motorola 68000 Features are 1.It is a 16-bit microprocessor. 2.There …

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