, , , Page of GC20-1834-0 As Updated Auge 1979 by TNL GN25-0486 3031 AP Extened Control Program Support
The Extended Control-Program Support for VM/370 the 3031 main processor and the 3031 attached
This function is a subset of the same as the
currently. available on the processors. (ECPS:VM/370) supports
processor environment.
previous ECPS: VM/370 At initialization, the machine implemented instruction level of the
two processors in a 3031 attached processor system is tested. If the
levels of these two processors are different, the CP Assist and Extended Virtual Machine Assist portions of the ECPS subset for the 3031 is
disabled on both the main and attached processor. Otherwise, the
special 3031 ECPS package is activated.
The specific subset of functions supported are: • Control Program Assist
FREE RETURN FRET SHAREDPAGE
LINK STECPSVM PTRLK TRANBRNG PTRUL TRANLOCK • Extended Virtual Machine Assist STPT TCH • Virtual In terval Timer
There are changes to the SET CPASSIST command and the QUERY CPASSIST command for attached processor support. 1 The SET command now allows
processor distinction in the 3031 attached processor environment. The QUERY response indicates which processor (main or attached) has the
function enabled. Trace table entries are also modified to reflect
instructions assisted by ECPS (bit 0) and whether the assist occurred on
the main or attached processor (bit 1). SRL AND PROGRAM LOGIC PUBLICATIONS The following publications contain information on VM/370 support for 3031 AP Extended Control Program. GC20-1801 Planning and System Generation Guide GC2(}-1806 Operator's Guide GC20-1807 System Programmer's Guide GC20-1821 Operating Systems in a Virtual Machine SY20-1884 Data Areas and Control Block Logic SY20-1886 System Logic and Problem Determination Guide --Volume 1 Section 1. Summary of Changes to the VM/370 System 1-30.3

Page of GC20-1834-0 As Updated Aug. 1, 1979 by TNL GN25-0486
The 4331 Communications Adapter Synchronous
Data link Control Support VM/370 supports the Synchronous Data Link Control (SDLC) feature of the
communications adapter on the 4331 system. It provides the 4331
communications Adapter with the capability to operate its TP lines in
SDLC mode. SRL AND PROGRAM LOGIC PUBLICATIONS The following publications contain information on the SDLC feature of
the 4331 communications Adapter: GC20-1801 Planning and System Generation Guide SY20-1884 Data Areas and control Block Logic
1-30.4 VM/370 Release 6 Guide