04488231 is referenced by 39 patents and cites 9 patents.

A data processing system includes a communication subsystem having an I/O microprocessor for communicating with a central processing unit and a main memory; and a line microprocessor for communicating with a number of devices. The I/O microprocessor and the line microprocessor communicate with each other through mailboxes stored in a shared memory. The line microprocessor interrupts the I/O microprocessor to process data bytes being transferred between main memory and a device requesting service when the line microprocessor has responded to the requesting device and loaded the mailbox.

Title
Communication multiplexer having dual microprocessors
Application Number
192126
Publication Number
4488231
Application Date
July 11, 1983
Publication Date
December 11, 1984
Inventor
Gary J Goss
Acton
MA, US
Kin C Yu
Burlington
MA, US
Agent
Nicholas Prasinos
George Grayson
Assignee
Honeywell Information Systems
MA, US
IPC
G06F 13/00
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