Fwd: VGA output
david at lang.hm
david at lang.hm
Tue May 19 00:01:35 EDT 2009
On Mon, 18 May 2009, John Watlington wrote:
> I guess Ian never put this info on the Wiki.
> Ian Daniher (it.daniher at gmail.com) was doing this
> as recently as this fall using connectors scavenged from
> A-phase boards.
> The problem is going to be obtaining the VGA connector.
> As far as I know, they are not available in small quantities.
> The pinout is attached.
it shouldn't be that hard to get a 15 pin D sub HD connector. Fry's or
Jamco have lots of options. is there something special about this
> Begin forwarded message:
>> From: John Watlington <wad at laptop.org>
>> Date: January 9, 2008 1:28:54 PM EST
>> To: it.daniher at gmail.com, seth at isforinsects.com
>> Cc: John Watlington <wad at laptop.org>
>> Subject: VGA output
>> OK. Absolutely no guarantees here --- the last time I tried to get a VGA
>> from Linux, it was broken. But as was pointed out on IRC, if your monitor
>> 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
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