Message Broadcast Facility
Original Publication Date: 1987-Apr-01
Included in the Prior Art Database: 2005-Feb-01
The program's function is to give MVS (multiple virtual storage) operators the ability to send messages to 3250 and 5080 graphics terminals running CADAM*. CADAM already provides an interrupt routine to allow operators to use the CADAM STOP and NEXT commands. This interrupt is modified to add a third command called MSGS. CADAM also already provides a monitor program which has the interrupt function and attaches the interactive CADAM module. When the CADAM monitor program gets on MSGS interrupt, the broadcast program will be called. The broadcast program finds the necessary graphics address and buffer information used by CADAM so that the 3250 and 5080 can be shared. The message sent with the MSGS command is then written to the graphics buffer at the location CADAM uses for its third line of data.