VESA Advanced Feature Connector
VAFC defines an open grpahics card expansion bus standard. The bus is bidirectional 16/32 bit bus with maximum clock rate of 37.5 MHz and maximum data transfer rate 150 Mbytes/s. This configuration supports graphics overlaying up to resolutions 1024x768 with 16 bit bus. The bus supports two devices connected up to 7" apart. VAFC supports genlocking of the graphics card to external source. There is limited backward output compatibility with 8-bit VESA Standard VGA Passthrough Connector (VSVPC).
Connector
The VAFC connector is a 80-pin high density connector with .100x.050 pin spacing. The cable used for connecting to that connector is 0.025" spaced ribbon cable.The connector has following pinout:
RSRV0 1 41 GND RSRV1 2 42 GND GENCLK 3 43 GND OFFSET0 4 44 GND OFFSET1 5 45 GND FSTAT 6 46 GND VRDY 7 47 GND GRDY 8 48 GND BLANK* 9 49 GND VSYNC 10 50 GND HSYNC 11 51 GND EGEN* 12 52 GND VCLK 13 53 GND RSRV2 14 54 GND DCLK 15 55 GND EVIDEO* 16 56 GND PO 17 57 P1 GND 18 58 P2 P3 19 59 GND P4 20 60 P5 GND 21 61 P6 P7 22 62 GND P8 23 63 P9 GND 24 64 P10 P11 25 65 GND P12 26 66 P13 GND 27 67 P14 P15 28 68 GND P16 29 69 P17 GND 30 70 P18 P19 31 71 GND P20 32 72 P21 GND 33 73 P22 P23 34 74 GND P24 35 75 P25 GND 36 76 P26 P27 37 77 GND P28 38 78 P29 GND 39 79 P30 P31 40 80 GND