G - Physics – 06 – F
Patent
G - Physics
06
F
354/237
G06F 12/06 (2006.01)
Patent
CA 1191273
ABSTRACT Memory module selection and reconfiguration apparatus in a data processing system wherein a modular working memory formed by a plurality of memory modules sends during the system initialization to a central processing unit information related to the capacities of the constituting modules. The central unit processes such information and provides the memory with a set of information representative of the capacity of the first module, of the sum of the capacities of the first and second modules, of the sum of the capacities of the first, second and third modules and so on, up to the total capacity of the working memory. This information set is stored in registers, each related to a respective module, of a module selection unit included inside the working memory. When the memory is addressed a most significant address portion is compared at the same time by several comparators, one for each register, with the content of the several registers. The comparison result signals in outputs from the comparators are applied to a decoder which, according to such signals, generates signals selecting one among the several memory modules. The module selection unit is carried out by means of simple and fast circuits so that the module selection time is very short.
416159
Gelmetti Marco
Mantellina Calogero
Zanzottera Daniele
Honeywell Information Systems Italia S.p.a.
Ridout & Maybee Llp
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