Some time ago, i inherited this old computer from friend, and bcause i'm old computer hobbyist, so i wanted to run it. Unfortinately, the video output is in SOG, that is unaccepted by my VGA monitor. Because i cannot find adapter SOG->VGA, at resonable price, i decided to modify the GPX 8-plane card in my box. Suprasingly it wasnt so hard, the sync signal i take from RAMDAC PIN, (this signal purpose is mixing with G analog signal), and put onto 7414 with a capacitor to separate Hsync+Vsync (as H ) and Vsync. It works fine, but is still one problem - the G signal is mixing with csync, and signal level is shifted up, so the color balance is distorted (the screeen is in green). To eliminate this problem, i grounded RAMDAC PIN, to force normal operation without SOG, then the signal was right, but appear new problem - the card after initialisation computer detect as faulty. After some investigation, i discover, that the mainboard probe the SOG output somewhere beetwen GPX and Video connector, and if detect missing csync, the card is marked as faulty. Because the PCB of mainboard is multilayer, i can't find the trace of connections.
PS: I hope, I'll be understanded (I know, my english is bad) .
I have another, possibly easyer solution for your Problem. I use a Samsung Syncmaster 17GLSi and it works fine with SOG machines. I just connect the RGB lines to the BNC connectors (just like the original DEC monitor) and that's it.
Maybe there are other multisync monitors with BNC connectors who can handle SyncOnGreen...
Try Ebay to find a Samsung GLSi... but not a GLi, this one has no BNC's.
Another possibility is to look for an SOG to VGA converter. There exist small boxes who do that.
malmberg March 24 2018 Probably. More people hang out on the comp.os.vms newsgroup.
vaxpert March 23 2018 I have a PE42A and other Alpha system stuff for sale. I'm in So California. Any interest out there?
goodbyespy February 27 2018 To Prohorenko. Please, visit group OpenVMS in the ok.ru
peteherrera February 24 2018 How much does it cost to buy a complete OpenVMS hardcopy documentation set of the latest version
prohorenko February 17 2018 Please help to obtain the license on OpenVMS
malmberg December 12 2017 HPE only makes the most current version of OpenVMS Alpha / IA64 /VAX available to hobbyists. When I had access to the Alliance 1 program it was the same. No public downloads are allowed by HPE.
nmbonao December 08 2017 Is anybody knows OpenVMS 8.2 version downloadable version? or CD copy? Thank you very much
aarommes December 02 2017 Bitcoin and Blockchain enthusiasts ( plus distributed computing ) please connec / reply: http://www.openvmshobbyis t.com/forum/viewthread.ph p?forum_id=130&thread_id= 2991
malmberg September 10 2017 https://sourceforge.net/p /vms-ports/wiki/VMSInstal lation/ For the most part just use VMS 6.1 media instead of 7.3. But why run the older release?
DoeveR August 07 2017 Where can I find the write up on running VMS 6.1 using the simh emulator?
Bart March 20 2017 Happy to have found my password again!