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Browse Prior Art Database

128 Bit Streaming Data Procedure for the Micro Channel

IP.com Disclosure Number: IPCOM000112315D
Original Publication Date: 1994-Apr-01
Included in the Prior Art Database: 2005-Mar-27
Document File: 2 page(s) / 27K

Publishing Venue

IBM

Related People

Arimilli, RK: AUTHOR [+2]

Abstract

Disclosed below is a protocol to achieve 128 bit Streaming Data protocol on the Micro Channel*. The extra pins are provided by a level D connector.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 100% of the total text.

128 Bit Streaming Data Procedure for the Micro Channel

      Disclosed below is a protocol to achieve 128 bit Streaming Data
protocol on the Micro Channel*.  The extra pins are provided by a
level D connector.

PINS   SIGNAL NAME     DEFINITION

 64    D64-D127        Upper 64 Data Bits for 128 bit Streaming Data.

 8    DPAR8-DPAR15    Upper 8 Parity Bits for 128 bit Streaming Data.

 1    -MSDR128        Slave Request of 128 bit Streaming Data.

1     -SD128_ACK     Master Acknowledgment of 128 bit Streaming Data.

      The 128 bit Streaming Data Protocol is identical to the 64 bit
Streaming Data Protocol with the addition of a master acknowledgment
signal.  During 128 bit Streaming Data Protocol, the upper 64 bits
are non-multiplexed.  Thus, an early indication from the master of
128 bit Streaming Data Protocol is allowed.  This allows -SD128_ACK
to have the same timings as the +TR32 signal.  The slave's -MSDR128
would have the same timings as the current -MSDR.  With this protocol
(and the added connector), one can provide an extremely high speed
channel for high performance I/O devices, while maintaining complete
compatibility with the existing Micro Channel Architecture.

*  Trademark of IBM Corp.