Browse Prior Art Database

Dual Purpose Activation Tags

IP.com Disclosure Number: IPCOM000085491D
Original Publication Date: 1976-Apr-01
Included in the Prior Art Database: 2005-Mar-02
Document File: 1 page(s) / 11K

Publishing Venue

IBM

Related People

Aichelmann, FJ: AUTHOR

Abstract

Described is a technique that expands the present role of activation tags, to include command or control for unique storage data transfers between engine and basic storage module (BSM), as well as designating the actual bandwidth of such transfers. In this mode of operation, the activation tags first reflect the memory transfer of the specific operation when a memory execution is signalled, followed by the actual units of transfers during subsequent transfers.

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Dual Purpose Activation Tags

Described is a technique that expands the present role of activation tags, to include command or control for unique storage data transfers between engine and basic storage module (BSM), as well as designating the actual bandwidth of such transfers. In this mode of operation, the activation tags first reflect the memory transfer of the specific operation when a memory execution is signalled, followed by the actual units of transfers during subsequent transfers.

Activation tags (or lines) are presently used to indicate the number of bytes of memory data that are to be active for read/write cycles. Single byte data transfers are assumed, if no lines are active. The term presently reflects the bandwidth rather than the sequence of such transfers of data.

The present technique eliminates certain interface control lines, for example, the instruction-fetch (I-fetch) line, as an advantage of the expanded definition or dual-purpose activation tags. The conventions shown in Table I are characteristic of this operation.

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