JAVIER CASTELLAR (javier++at++mar.madrid.sgi.com)
Wed, 4 Jan 1995 18:24:58 -0800
You have two options: work with fields or work with frames.
A) FRAMELOCKING:
In order to get it framelocked we have four dedicated vofs for the DG2
(it means: Video Output Formats for the Reality Engine graphics output (DG2)).
1280x1024_50f (PAL) It suports field swapbuffering on the traslation from the
graphics frame buffer (RE2) up to the Sirius field
buffers.
It does as well the frame locking. (I LIKE IT)
1280x1024_25f (PAL) It support only complete frame updates on the translation
from the gfx frame buffer (RE2) up to the pairs of
field buffers (Sirius)
1280x1024_60f and 1280x1024_30f are the couple of vofs for NTSC
You can use "setmon ..." to use it. Please refer to the on line manual
pages. See before the example at (C)
Then you have framelocked the Reality Engine swapbuffers to the Sirius
but you need to GENLOCK the video signals.
B) GENLOCKING:
One possible aproach is:
g.o.: Genlock out
g.i.: Genlock in
Sync pattern -------> Video Source ---->Sirius------>Reality Engine
g.o. g.i. g.o. g.i g.o. g.i. (DG2) g.o.
terminated
In order to enable the genlocking in the RealityEngine you have to use
the -g option when you use "setmon". Be careful, if you don't receive genlock
in the graphics display will not retrace: use a text terminal on a serial port
or a network rlogin to rearrange it.
C) SETTING UP for FRAMELOCKING + GENLOCKING for PAL:
Reality Engine:
su
setenv DISPLAY :0.0
/usr/gfx/setmon -g 1280x1024_50f
(if you wish to make it permanent after reboot)
or
/usr/gfx/setmon -n -g 1280x1024_50f (if you wish to make some trials)
Sirius:
use the video control panel (vcp)
vcp
and select the proper genlock option using the nice interface (house)
D) FINAL POINTERS:
You should have the documentation. On 5.3 it is online in Insight.
Hope to help.
-Javier
-- ******************************************************************** * Javier Castellar * Email: javier++at++madrid.sgi.com * * Systems Engineer * Vmail: x59665 * * Gfx guru * Phone: ++34-1-4429077 * * Silicon Graphics Spain* Fax: ++34-1-4420150 * ******************************************************************** Nobody said that the life was a fair play Javier Castellar
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