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Author Topic: Check my math  (Read 3349 times)
daitod
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Posts: 14


« on: June 22, 2014, 10:26:47 PM »

If my video card BIOS is decoded as follows:

Code:
R687OGD.F5  :
GV-R687OC-1GD/F5

Subsystem Vendor ID: 1458
       Subsystem ID: 21fa
Object Header Structure Size: 407
Connector Object Table Offset: 52
Router Object Table Offset: 0
Encoder Object Table Offset: 12a
Display Path Table Offset: 12
Connector Object Id [19] which is [DISPLAY_PORT]
encoder obj id [0x21] which is [INTERNAL_UNIPHY2 (osx txmit 0x12 [duallink 0x2] enc 0x4)] linkb: false
Connector Object Id [19] which is [DISPLAY_PORT]
encoder obj id [0x21] which is [INTERNAL_UNIPHY2 (osx txmit 0x22 [duallink 0x2] enc 0x5)] linkb: true
Connector Object Id [12] which is [HDMI_TYPE_A]
encoder obj id [0x20] which is [INTERNAL_UNIPHY1 (osx txmit 0x11 [duallink 0x1] enc 0x2)] linkb: false
Connector Object Id [3] which is [DVI_D]
encoder obj id [0x20] which is [INTERNAL_UNIPHY1 (osx txmit 0x11 [duallink 0x1] enc 0x2)] linkb: false
Connector Object Id [2] which is [DVI_I]
encoder obj id [0x1e] which is [INTERNAL_UNIPHY (osx txmit 0x10 [duallink 0x0] enc 0x0)] linkb: false
Connector Object Id [2] which is [DVI_I]
encoder obj id [0x15] which is [INTERNAL_KLDSCP_DAC1 (osx txmit 0x00 enc 0x10?)] linkb: false

And OS X stupidly uses the 4-port Duckweed personality for the card instead of the more-correct 5-port Gibba personality

Then the following edit to the Duckweed portion of AMD6000Controller.kext should enable both DVI ports of the video card to work.

Code:
0004 0000 0403 0000 0001 0000 1204 0401
0400 0000 1402 0000 0001 0000 1000 0305
0200 0000 4000 0000 2905 0000 0000 0004
0004 0000 0403 0000 0001 0000 1102 0101

Correct?
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