Stop-On-Address Function for Processors Attached to the Ibm Series/1
Original Publication Date: 1984-Aug-01
Included in the Prior Art Database: 2005-Feb-04
When a Stop-On-Address function is required by the computer user, but this function is not part of the console logic, it is at times desirable to provide a method of implementing a Stop-On-Address without requiring extensive address comparison circuitry. This design enables a processor to monitor the address bus and perform an address comparison during storage access cycles to provide Stop-On-Address functions. The design involves the situation where there is an external microprocessor attached to a main processor in such a manner as to provide an auxiliary (common) storage area. This common portion of storage is not visible in normal execution to any of the software residing in the main processor. Auxiliary storage may only be accessed by means of a special interrupt, referred to here as Console Request.