Hello, last week I reported bug #2325: capturing sound on the M-Audio Revolution 5.1 does not work. While trying to figure out the cause of the problem, I encountered the following question: What are the GPIO pins of the Envy24GT connected to for this card? Since there is already a driver, somebody will probably have figured this out, but I could not find documented anywhere. What I did find out: 1) The ice1712/revo.h header file (shared by Revolution 7.1 and 5.1) defines the following: #define VT1724_REVO_CCLK 0x02 #define VT1724_REVO_CDIN 0x04 /* not used */ #define VT1724_REVO_CDOUT 0x08 #define VT1724_REVO_CS0 0x10 /* not used */ #define VT1724_REVO_CS1 0x20 /* front AKM4381 chipselect */ #define VT1724_REVO_CS2 0x40 /* surround AKM4355 chipselect */ #define VT1724_REVO_MUTE (1<<22) /* 0 = all mute, 1 = normal operation */ Why are the "not used" ones there? 2) From visual inspection of the card (a photo is at http://seehuhn.de/comp/hardware/revoboard.jpg ) I think that the following GPIO pins are connected to something: 0x01 (seems to go to the PCI bus) 0x02 0x04 0x20 0x40 0x80 (1<<22) Note that 0x80 is not mentioned in the header file. Is this a problem? 3) I think that AK4381 and AK4355 as mentioned in the header file are DACs. The Revolution 5.1 has only one DAC (an AK4358), not two. Could this cause problems? Many thanks, Jochen -- http://seehuhn.de/
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