custom screen modes on an o2 - Printable Version
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+- IRIX Network Forums (//forums.irixnet.org)
+-- Forum: SGI/MIPS (//forums.irixnet.org/forum-3.html)
+--- Forum: IRIX/Software (//forums.irixnet.org/forum-7.html)
+--- Thread: custom screen modes on an o2 (/thread-2215.html)
custom screen modes on an o2 - soviet - 06-13-2020
Is possible to have a custom screen mode 1366x768 on an o2 ?.
Maybe some one have try it or already done ?.
RE: custom screen modes on an o2 - callahan - 06-13-2020
Should be. What display is this for? It's generally best to try to match the modeline/edid data for the specific monitor.
Lots more info on custom video formats here (note vfc is not installed by default in Irix): https://wiki.preterhuman.net/Video_Format_Object_(VFO)_Files.
If you send me the monitor info I can probably get something working in a few days.
RE: custom screen modes on an o2 - mgtremaine - 06-14-2020
It is. I run 1600x900 oddly enough. I can post my vfo file tomorrow if it helps. [I literally just powered the o2 down :( ]
-Mike
Added: Below are the 2 pieces I used to generate my 1600x900 custom resolution. The trick is to look up your monitor specs create a VFS file using them (name it you monitor type so you remember) then generate your vfo file using the vfc.command it will move it place for you.
my vfc.command file
#!/bin/sh
/usr/sbin/vfc -c chip=/usr/gfx/ucode/vfc/rules/O2_Chip.def,board=/usr/gfx/ucode/vfc/rules/O2_Board.def HP2009M.vfs
mv a.vfo /usr/gfx/ucode/CRM/vof/1600x900_60.vfo
######
my HP2009M.vfs file
General
{
FieldsPerFrame = 1;
FramesPerSecond = 60;
TotalLinesPerFrame = 1002;
TotalPixelsPerLine = 1800;
ActiveLinesPerFrame = 900;
ActivePixelsPerLine = 1600;
FormatName = "1600x900@60 LCD";
}
Active Line {
HorizontalFrontPorch = 24 pixels;
HorizontalSync = 80 pixels;
HorizontalBackPorch = 96 pixels;
}
Field
{
Vertical Sync =
{
{
Length = 1.0H;
Low = 0.0 usec;
}
repeat 3
{
Length = 1.0H;
}
}
Initial Low;
Vertical Back Porch =
{
{
Length = 1.0H;
High = HorizontalSync;
}
repeat 96
{
Length = 1.0H;
Low = 0.0 usec;
High = HorizontalSync;
}
}
Initial High;
Active =
{
repeat 900
{
Length = 1.0H;
Low = 0.0 usec;
High = HorizontalSync;
}
}
Vertical Front Porch =
{
repeat 1
{
Length = 1.0H;
Low = 0.0 usec;
High = HorizontalSync;
}
}
}
#if 0
postprocess
{
dump edge;
}
#endif
RE: custom screen modes on an o2 - lohmos - 02-25-2021
http://mirror.rqsall.com/misc/sgi/SGI_O2_VPro_VFO_Various.zip