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Conference wrksys::alphastation

Title:Alpha Workstation Conference
Notice:See note 1.* for conference notices
Moderator:WRKSYS::HOUSE
Created:Wed Sep 07 1994
Last Modified:Fri Jun 06 1997
Last Successful Update:Fri Jun 06 1997
Number of topics:1996
Total number of notes:9122

1879.0. "Question re: ZLXp-E1 and sync-on-green" by ASGMKA::DAY () Thu Feb 27 1997 19:23

    I have a customer who believes that the ZLXp-E1 has a jumper 
    setting that will force sync on green. Is that the case and, 
    if so, what is it?
    
    This customer has been quite insistent and a final answer to 
    this question would be very much appreciated.
    
    Rich
T.RTitleUserPersonal
Name		DateLines
1879.1There is an Environment VariableWRKSYS::DONALDSo Long, And Thanks For All The FishThu Feb 27 1997 20:1517
Hi Rich,

I don't think there was a hardware switch, but there is an SRM enviroment 
variable that the driver would check. Here's a blurb from the 
AlphaStation 200 Service Guide:

tga_sync_green	This variable is used to control the composite video signal  
                for monitors on the ZLXp controller that cannot detect the 
                presence of composite video or v/h signals.  The possible 
                values are:

                1 - Composite video for first ZLXp.
                2 - Composite video for second ZLXp.
                3 - Composite video for first and second ZLXp.

Cheers,
Terry
1879.2See note 41.* for tables, extensive discussion...XDELTA::HOFFMANSteve, OpenVMS EngineeringFri Feb 28 1997 17:3412
   The Synch-on-Green is an Environment variable, and only under SRM.

   There is a switch setting on the ZLXp-E1 module that can force-select
   synch-on-green, but NT cannot switch the console between the bootstrap
   console display *and* the run-time displays.  (ie: one gets garbage
   during the bootstrap, until NT is up and running.  These systems must
   be set to auto-boot, as the AlphaBIOS/ARC lacks support for a serial
   console and for the TGA_SYNC_GREEN environment variable.)

   See WRKSYS::ALPHASTATION 41.13, 41.21, and 41.23, etc.