Method and apparatus for adjusting output current values for exp

Details Method and apparatus for adjusting output current values for exp Method and apparatus for adjusting output current values for exp

1996-04-25

1998-03-10

Chan, Eddie P.

Static information storage and retrieval

Magnetic bubbles

Guide structure

39549703, 36518905, G06F 1200

Patent

active

057271828

ABSTRACT:
A memory access control apparatus, which is employed for a computer system in which an expansion memory can be installed in addition to a standard memory and which controls the access to the memory by one or more signal lines, comprises an identification circuit for reading identification data of the installed expansion memory, a determination circuit for determining the optimal output current values for the signal lines based on the identification data; and a memory controller for adjusting the output current values of the signal lines based on the results obtained by the determination means. Even when multiple types of expansion memories (DIMM cards) whose memory capacities and memory chip arrangements are different are installed, the waveforms and the timings for the output signal lines (RAS, CAS, WE, and MA) of the memory controller can be dynamically compensated for.

REFERENCES:
patent: 5179686 (1993-01-01), White
patent: 5237674 (1993-08-01), Mohme et al.

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