Type ASSEMBLE
Source Lines : 1,212
Fixes Applied : 12
Most Recent Version : Thursday, December 7, 1978
Last Fix ID : [HRC064DK]
Module
DMKVCN
Function
TO HANDLE THE SIMULATION OF ALL USER SIO'S TO A VIRTUAL
CONSOLE
Attributes
REENTRANT, RESIDENT, ENTERED VIA GOTO FROM DMKVIOEX
Operation
1. MARK THE VIRTUAL DEVICE AND SUBCHANNEL BUSY, CLEAR THE
CSW AND SAVE THE STORAGE KEY.
2. VERIFY THAT THE DEVICE IS READY; IF NOT SET INTERVENTION
REQUIRED IN THE VIRTUAL SENSE BYTE AND INDICATE UNIT
CHECK.
3. IF THE CCW OP-CODE IS LEGAL CONTINUE PROCESSING FOR THE
GIVEN CCW OP-CODE TYPE; OTHERWISE SET COMMAND REJECT IN
THE VIRTUAL SENSE BYTE AND INDICATE UNIT CHECK.
Calls to Other Routines
DMKFREE, DMKFRET - TO GET AND RETURN A DATA BUFFER FROM FREE
STORAGE
DMKQCNWT - TO WRITE DATA TO THE USER IN RESPONSE TO A
WRITE CCW, AND TO WRITE THE VIRTUAL BELL MESSAGE
IN RESPONSE TO AN ALARM CCW
DMKQCNRD - TO READ DATA FROM THE USER IN RESPONSE TO A VIRTUAL
READ CCW
DMKCFMBK - TO PLACE THE USER IN CONSOLE FUNCTION MODE IF 2
OR MORE ATTENTIONS ARE HIT
DMKSCNVU - TO SCAN FOR VIRTUAL CONSOLE DEVICE AFTER
READ OR WRITE RETURN - IT MAY HAVE MOVED.
DMKDSPCH - TO AWAIT COMPLETION OF CONSOLE I/O
DMKCFMAT - TO SET AN ATTN INT PENDING
DMKPSASC - TO CHECK STORAGE PROTECTION KEY
DMKPSACC - TO CHECK IF SHARED PAGE HAS BEEN CHANGED
DMKVMAPS - TO UNSHARE A NAMED SHARED SYSTEM FROM RUNUSER
HDKD58EN - TO HANDLE DIAGNOSE X'58' FULL SCREEN I/O HRC058DK