Data processing unit for transferring data between devices suppo

Details Data processing unit for transferring data between devices suppo Data processing unit for transferring data between devices suppo

1995-04-26

1997-02-04

Chan, Eddie P.

Boots, shoes, and leggings

395411, 39542101, 39542102, 3954211, 395307, 364DIG1, 3642291, 3642386, 3642541, 3642548, G06F 1310

Patent

active

056008147

ABSTRACT:
A data processing system comprising a main memory 10 with a 32-bit longword data bus 11 and an address bus 12, and a link unit 20 using 16-bit shortwords. The link unit has two shortword memories 26 and 28 for descriptor and message shortwords. Descriptor shortwords are exchange individually with the memory 10, residing in the lower halves of longword locations; message shortwords are exchanged with the memory 10 through a concatenation and deconcatenation unit 40 so that they are stored in pairs in longword locations. Unit 20 passes descriptor addresses (with top bit 1) from a register 25 and message addresses (with top bit 0) from a register 27 to the main memory through address processing means 36, which comprises a multiplexer 43 with its two data inputs fed with two versions of the address with a 1-bit shift between them. The top address bit controls the multiplexer, so that the main memory address steps by 1 for every step of a descriptor address or every second step of a message word address.

REFERENCES:
patent: 4716527 (1987-12-01), Graciotti
patent: 4831514 (1989-05-01), Turlakov et al.
patent: 4878166 (1989-10-01), Johnson et al.
patent: 5280598 (1994-01-01), Osaki et al.
patent: 5303353 (1994-04-01), Matsumura et al.
patent: 5357622 (1994-10-01), Parks et al.
patent: 5394528 (1995-02-01), Kobayashi et al.
Dictionary of Computers, Information Processing & Telecommunications 2nd Edition, Jerry M. Rosenberg, John Wiley & Sons, New York 1984.

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