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Hardware Compatibility
The computer supports most of the interfaces used by the IBM
Personal Computer AT* and the Personal System/2* (PS/2*)
products. In many cases, the command and status organization of
these interfaces is maintained.
The functional interfaces for the computer are compatible with the
following:
The Intel 8259 interrupt controllers (edge trigger mode).
The Intel 8254 timers driven from 1.193 MHz (channels 0, 1, and
2).
The Intel 8237 DMA controller-address/transfer counters, page
registers, and status fields only. The command and request
registers, and the rotate and mask functions, are not supported.
The mode register is partially supported.
The NS16550 serial communications controller.
The Intel Pentium microprocessor.
The Intel 8086**, 8088**, 80286**, 80386**, and i486DX
microprocessors.
The Intel 8087**, 80287**, 80387** math coprocessors.
The Intel 82077AA** diskette drive controller.
The keyboard interface at addresses hex 0060 and hex 0064.
Display modes supported by the IBM Monochrome Display and
Printer Adapter, the IBM Color/Graphics Monitor Adapter, and the
IBM Enhanced Graphics Adapter.
The parallel printer ports (Parallel 1, Parallel 2, and Parallel 3) in
compatibility mode.
2-34 System Board