VGA: Difference between revisions

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(New page: John Watlington said: OK. Absolutely no guarantees here --- the last time I tried to get a VGA output from Linux, it was broken. But as was pointed out on IRC, if your monitor has a...)
 
m (AAA16 moved to VGA over redirect: revert)
 
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Latest revision as of 20:17, 17 September 2009

John Watlington said:

OK.   Absolutely no guarantees here --- the last time I tried to get a VGA output
from Linux, it was broken.   But as was pointed out on IRC, if your monitor has
a wide enough lock range this might work on production machines (we fixed
a problem between B2 and B3 that was also causing problems.)
Components that were depopulated on C2 (MP machines) needed to support
VGA output are:
U2, U3: 74AHCT1G125GW    (sync drivers)
C152:    0.1 uF
R1, R2, R3:  75 ohm
To support the VGA I2C link (UART 2 on the CS5536 southbridge):
R122, R123:  10K
Q7, Q8:  2N7002
R115, R116:  10K
D6:  CH501H-40PT  (just about any schottky diode should do, this is inline
    in the +5V supplied to the monitor)
Good luck finding that VGA connector, I don't have a part number for it.
The pinout is attached.
The signal/pin mapping is:
Red - 1
Green - 2
Blue - 3
NC - 4,11
GND - 5,6,7,8,10
VSYNC - 14
HSYNC - 13
EDID_DATA - 12
EDID_CLK - 15