DATA TRANSFER EQUIPMENT

DATA TRANSFER EQUIPMENT

PURPOSE:To open a bus and to attain a direct memory access by using a means which inhibits the input/output information delivered from a processor when an access device gives an access to a memory. CONSTITUTION:In a DMA mode an access device 3 delivers a request signal DCS for the execution of the D...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Hauptverfasser: NISHIOKA SATORU, SHIODA TAKUJI
Format: Patent
Sprache:eng
Schlagworte:
CALCULATING
COMPUTING
COUNTING
ELECTRIC DIGITAL DATA PROCESSING
PHYSICS
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Beschreibung
Zusammenfassung:PURPOSE:To open a bus and to attain a direct memory access by using a means which inhibits the input/output information delivered from a processor when an access device gives an access to a memory. CONSTITUTION:In a DMA mode an access device 3 delivers a request signal DCS for the execution of the DMA. Then an inhibiting means 2 inhibits the transmission of the input/output information delivered to a bus 5 from a processor 1. Thus the bus 5 is opened and the DMA is possible. Here the input/output information of the CPU 1 is sent to a bus 6 but not to the bus 5 since the bus 5 is cut by the means 2.