Boots – shoes – and leggings
Patent
1994-03-31
1994-10-18
Rudolph, Rebecca L.
Boots, shoes, and leggings
364DIG1, 3642327, 364245, 364248, 365 63, G06F 1200
Patent
active
053576241
ABSTRACT:
A Single Inline Memory Module (SIMM) support system enables a computer system to recognize and address 1-Mbyte, 4-Mbyte and 16-Mbyte SIMMs installed in a receiving socket having only a number of pins sufficient to address the 1-Mbyte and 4-Mbyte SIMMs. The capacity of the SIMM is determined by a TYPE signal on a predetermined pin of the installed SIMM which is connected to a pull-up resistor of the SIMM support circuitry and generates a TYPE signal. If the TYPE signal is a logic low, the installed SIMM has a 1-Mbyte capacity. If the TYPE signal is a logic high, the installed SIMM has a 4-Mbyte or a 16-Mbyte capacity. In order to remain pin compatible with 1-Mbyte and 4-Mbyte SIMMs, a 16-Mbyte SIMM cannot have any additional pins to address the additional memory locations. Thus, the TYPE signal shares a pin with the most significant address bit required to address the 16-Mbyte SIMM. The sharing is controlled so that the most significant address bit is only active when the TYPE signal is in its inactive high state.
REFERENCES:
patent: 4545010 (1985-10-01), Salas et al.
patent: 4787060 (1988-11-01), Boudreau et al.
patent: 5036481 (1991-07-01), Lunsford et al.
patent: 5253357 (1993-10-01), Allen et al.
patent: 5272664 (1993-12-01), Alexander et al.
AST Research Inc.
Nadig Sheela N.
Rudolph Rebecca L.
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