ibm:vm370-lib:cp:dmkscn.assemble_abs
Table of Contents
DMKSCN Abstract
Statistics
Type ASSEMBLE
Source Lines : 1,539
Fixes Applied : 2
Most Recent Version : Thursday, December 14, 1978
Last Fix ID : [R11217DK]
Synopsis
Module
DMKSCN
Function
TO RETURN TO THE CALLER THE ADDRESSES OF THE REAL CHANNEL, CONTROL UNIT, AND DEVICE BLOCKS FOR A GIVEN REAL DEVICE.
Attributes
REENTRANT, RESIDENT, CALLED VIA BALR
Operation
1. THE CHANNEL BITS OF THE REAL DEVICE ARE INDEXED BY DMKRIOCT AND DMKRIOCH TO PRODUCE THE ADDRESS OF THE REAL CHANNEL BLOCK (RCHBLOK) IN GPR 6 (IF IT EXISTS). 2. THE CONTROL UNIT BITS OF THE REAL DEVICE ARE INDEXED BY THE RCHBLOK (FROM STEP 1) AND DMKRIOCU TO PRODUCE THE ADDRESS OF THE REAL CONTROL UNIT BLOCK (RCUBLOK) IN GPR 7 (IF IT EXISTS). 3. THE DEVICE BITS OF THE REAL DEVICE ARE INDEXED BY THE RCUBLOK (FROM STEP 2) AND DMKRIODV TO PRODUCE THE ADDRESS OF THE REAL DEVICE BLOCK (RDEVBLOK) IN GPR 8 (IF IT EXISTS).
Calls to Other Routines
NONE
ibm/vm370-lib/cp/dmkscn.assemble_abs.txt ยท Last modified: 2023/08/06 13:37 by Site Administrator