Virtual Hometerm Subsystem (VHS) Manual (H06.03+)

Introduction to VHS
Virtual Hometerm Subsystem (VHS) Manual—429311-001
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VHS and the Application Environment
VHS and the Application Environment
You configure your applications to send home terminal messages to VHS. If your
applications go into Inspect or Debug, VHS will handle the Inspect prompt or let you do
it, depending on your configuration.
VHS Components
VHS has three major components:
The VHS process receives messages of many types from many sources. VHS
manages six types of messages: open messages, display messages, Inspect prompts,
Debug prompts, application prompts, and reply messages.
The following table summarizes how VHS responds to messages and prompts.
VHS process Emulates a 6530 terminal.
VHS conversational
interface
(VHSCI)
Enables you to interact with and configure the VHS
process in a standard conversational interface.
VHS Browser Enables you to look at primary log file messages and
application prompts and to reply to application
prompts.
Type of message VHS Action
Open message Determines the object file of the process and acts accordingly
Display messages Saves the message in the text part of an EMS event, sends the
event to the collector if configured to do so (see parameter
GENERATE-DISPLAY-EVENT), and logs the message in the primary
log file
Inspect prompts Depending on the VHSINSP file and the AUTOMATIC-INSPECT-
PROCESSING parameter, VHS will handle the Inspect prompt by
sending commands found in the VHSINSP file, will also create a
saveabend file to save the application’s context and will stop the
application, or VHS will let you handle the prompt by writing to its
prompt file. VHS will log Inspect messages in its primary log file.
VHS can also send EMS events to the collector if configured to do so
(see the GENERATE-INSPECT-EVENT parameter)