Boots – shoes – and leggings
Patent
1992-06-22
1994-01-18
Fleming, Michael R.
Boots, shoes, and leggings
395250, 364DIG1, 364239, 364246, 36424611, G06F 1206, G06F 1336
Patent
active
052805905
ABSTRACT:
A support chip includes substantially all the AT core logic, namely most of the X-bus peripherals (except for the keyboard controller), memory controllers, and swapper. The normal AT data paths are altered to reduce the pin count, with a resulting surprising improvement in capability. The chip interfaces to the microprocessor's local address and data buses and provides a 16-bit data bus corresponding to a 16-bit version of the X-bus data portion (XD-bus). External buffers coupled to the XD-bus provide a system data bus (SD-bus) corresponding to the S-bus data portion. The I/O channel is coupled to the SD-bus while system ROM is coupled to the XD-bus. To accommodate the fact that the swapper is internal, the support chip provides independent direction control of the high and low order buffers between the XD-bus and the SD-bus.
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patent: 4727509 (1988-02-01), Johnson et al.
patent: 4811203 (1989-03-01), Hamstra
patent: 4920477 (1990-04-01), Colwell et al.
patent: 5045998 (1991-09-01), Begun et al.
patent: 5125080 (1992-06-01), Pleva et al.
Catlin Robert W.
Pleva Robert M.
Chips and Technologies, Incorporated
Fleming Michael R.
Sheikh Ayaz R.
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