COMP 372 Assgn. # 1 IC Layout for 6800 family

The 68000 has eight 32-bit data registers (D0-D7), eight 32-bit address registers (A0-A7), a 32-bit program counter, two 32-bit stack pointers, and a 16-bit status register (Figure 7-1). The processor is capable of handling data as either 32-bit-long words, 16-bit words, bytes, or bits.

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Figure 7-1: Programmer's model of the 68000

The processor has two modes of operation, supervisor mode (operating system) and user mode (applications). The mode of operation is made available to external hardware, thereby allowing the address decoder to have separate supervisor and user spaces.

Figure 7-2: MC68000 block diagram and pinout

Reference
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