MDF for 1920x1080 LCD monitor

[Ewen Pring]

Maximum and optimal resolution of my new HD widescreen sized LCD
monitor is 1920x1080 (60Hz) with analogue input.

I can't find an MDF online, or indeed any reference to anyone
successfully using this resolution with RISC OS.

I have found an MDF mode for 1680x1050 which works, but not ideally
due to pixel interpolation.

I also found an MDF mode for 1920x1200, which obviously doesn't work
being too large vertically, although I tried altering it in !Makemodes
with no clue what I was really doing, but the monitor always
complained the signal was out of range when I tested the results.

The monitor is a ViewSonic VA2213W-2

The spec gives a normal range of frequencies viz
horiz freq 24-82 kHz
vert freq 50-75 Hz

but no mention of the timings needed by !Makemodes. 5ms is the
advertised response time.

Can anyone help?

[David Pitt]

Post by Ewen Pring
Maximum and optimal resolution of my new HD widescreen sized LCD
monitor is 1920x1080 (60Hz) with analogue input.
I can't find an MDF online, or indeed any reference to anyone
successfully using this resolution with RISC OS.
I have found an MDF mode for 1680x1050 which works, but not ideally
due to pixel interpolation.
I also found an MDF mode for 1920x1200, which obviously doesn't work
being too large vertically, although I tried altering it in !Makemodes
with no clue what I was really doing, but the monitor always
complained the signal was out of range when I tested the results.

I would start with the 192081200 MDF and decrease the display
height to 1080 and then increase the vertical borders evenly to maintain
the vertical timing totals. By that means I have a 1912*1072 mode
for VRPC that fits within a full size Windows window on a 1900*1200
display.

Original :-

# 1920 x 1200 (75Hz)
startmode
mode_name:1920 x 1200
x_res:1920
y_res:1200
pixel_rate:178000
h_timings:10,10,16,1920,0,0
v_timings:10,0,0,1200,0,0
sync_pol:0
endmode


Modified :-

# 1912 x 1072 (75Hz)
startmode
mode_name:1912 x 1072
x_res:1912
y_res:1072
pixel_rate:178000
h_timings:10,10,20,1912,4,0
v_timings:10,0,104,1072,104,0
sync_pol:0
endmode


Suggestion :-

# 1920 x 1080 (75Hz)
startmode
mode_name:1920 x 1080
x_res:1920
y_res:1080
pixel_rate:178000
h_timings:10,10,16,1920,0,0
v_timings:10,0,100,1080,100,0
sync_pol:0
endmode

If the monitor does not like that it would be necessary to start with a
mode at a frame frequency the monitor will accept.

[druck]

Post by David Pitt
Original :-
# 1920 x 1200 (75Hz)
startmode
mode_name:1920 x 1200
x_res:1920
y_res:1200
pixel_rate:178000
h_timings:10,10,16,1920,0,0
v_timings:10,0,0,1200,0,0
sync_pol:0
endmode

[snip]

Post by David Pitt
Suggestion :-
# 1920 x 1080 (75Hz)
startmode
mode_name:1920 x 1080
x_res:1920
y_res:1080
pixel_rate:178000
h_timings:10,10,16,1920,0,0
v_timings:10,0,100,1080,100,0
sync_pol:0
endmode

That wont still be 75Hz, as you haven't adjusted the pixel rate.
You need to multiply it by 1080/1200 to reflect the reduced line
count.

---druck

[Dave Plowman (News)]

Post by Ewen Pring
The monitor is a ViewSonic VA2213W-2
The spec gives a normal range of frequencies viz
horiz freq 24-82 kHz
vert freq 50-75 Hz
but no mention of the timings needed by !Makemodes. 5ms is the
advertised response time.
Can anyone help?

I knocked up an MDF with widescreen modes for a Viewsonic widescreen which
may give you a starting point. If you email me (address detail below) I'll
send it to you. Not saying it's definitive by any means.

[Ewen Pring]

I have solved the problem. My new MDF is available to download from
the URL below, along with more explanation of how I created it etc,
and will remain there, for anyone else who finds it of use.

A suggestion to use a PC was the solution - I transferred across the
timings from that.

[S G]

Post by Ewen Pring
I have solved the problem. My new MDF is available to download from
the URL below, along with more explanation of how I created it etc,
and will remain there, for anyone else who finds it of use.

Why not put it up at:
http://www.riscos.info/index.php/Monitor_Definition_Files
?