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EM9010 register map
| Register | Description | Value / Bit | Value / Bit description |
|---|---|---|---|
| 1,2 | 16-bit address | ||
| 3,4 | 16-bit data | ||
| 6 | Stability | ||
| 7 | Jitter | bit 3-0 | Jitter control |
| bit 7,6 | 00 = Video on black background | ||
| 01 = Video and VGA signal mixed | |||
| 10 = VGA only | |||
| 8 | 0x80 | Default value | |
| 9 | Unknown (default 0x4) | bit 0 | When set the video window turns cyan |
| bit 2 | If this bit is cleared the video image covers the entire screen and goes out of sync. | ||
| 0xa | Chroma key function | bit 4,0 | Blue component chroma key funtion |
| bit 5,1 | Green component chroma key funtion | ||
| bit 6,2 | Red component chroma key funtion | ||
| 0xb | Have no idea | 0xaa | This value is send to the chip followed by a read and if the same value comes back the chip is considered present. |
| 0xb | 0xc8 | This value is sent before color key auto-calibration | |
| 0xb | 0x14 | This value is sent before offset autocalibration | |
| 0xc | bit 7 | Gamma Enable | |
| bit 0-6 | Default value: 0xe | ||
| 0xd | Has something to do with horizantal sync | 0x44 | Value used by NT driver |
EM9010 16-bit register map
| Register | Description | Value / Bit | Value / Bit description |
|---|---|---|---|
| 0x1 | Has something to do with horizontal sync. | ||
| 0x8 | Chroma keying red component interval | bit 7-0 | Lower Limit (LL) |
| bit 15-8 | Upper limit (UL) | ||
| 0x10 | Chroma keying green component interval | bit 7-0 | Lower Limit (LL) |
| bit 15-8 | Upper limit (UL) | ||
| 0x20 | Chroma keying blue component interval | bit 7-0 | Lower Limit (LL) |
| bit 15-8 | Upper limit (UL) |
Chroma key function
C = Color component value| Value | Condition |
|---|---|
| 00 | L < C < UL |
| 01 | C < UL |
| 10 | LL < C |
| 11 | Always true |
