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1 | ------------------------------------------------------------------------------- | |
2 | Realtek ALC655: AC'97 data | |
3 | ------------------------------------------------------------------------------- | |
4 | ||
5 | This is set of example captures of the AC'97 data on a Realtek ALC655 | |
6 | six-channel AC'97 2.3 audio codec. The data is a snippet of the traffic | |
7 | that occurs on an ASUS A8NE-FM/S mainboard (which contains the ALC655) | |
8 | during BIOS power-up. | |
9 | ||
10 | Details: | |
11 | https://en.wikipedia.org/wiki/AC%2797 | |
12 | http://realtek.info/pdf/alc655.pdf | |
13 | ||
14 | ||
15 | Logic analyzer setup | |
16 | -------------------- | |
17 | ||
18 | The logic analyzer used was a Saleae Logic16 (at 50 MHz): | |
19 | ||
20 | Probe ALC655 | |
21 | ------------------ | |
22 | 0 BIT-CLK | |
23 | 1 SDATA-OUT | |
24 | 2 SDATA-IN | |
25 | 3 SYNC | |
26 |