Rene Herman wrote:

> I'll try to see if I can find anything in the 1969 or 1978 docs.
> Please beat me to it though... :-)

The minimal patch I need to have things functional, is not enabling TDMA 
in sound/pci/es1968.c:

@@ -2197,10 +2197,7 @@ static void snd_es1968_chip_init(es1968_
         /* Config Reg A */
         pci_read_config_word(pci, ESM_CONFIG_A, &w);

-       /*      Use TDMA for now. TDMA works on all boards, so while its
-        *      not the most efficient its the simplest. */
         w &= ~DMA_CLEAR;        /* Clear DMA bits */
-       w |= DMA_TDMA;          /* TDMA on */

With that applied, things seem to be working fine again. With the bits 
cleared, it's set to "Distributed DMA" which is disabled via the DDMA 
control register (0x60), so this should be okay? The comment's a bit 
puzzling but doesn't this stuff apply only to the legacy DMA, which 
isn't used in this driver, anyway?

While looking there, I also noticed two bits that are reversed between 
documentation and source. One of them in fact the "Enable Legacy Audio" 
bit, so I expected that to be the trouble at first, although it wasn't. 
In the second attached patch, this bit is set in accordance with the 
documentation. Works for me... with the bit set either way, I don't seem 
to be experiencing conflicts with the CS4236 (which also has an enabled 
SBPro emulation) so I just trusted the documentation.

The other one is the "Emulate ISA timing on PCI bit". The code said and 
commented that it enabled the emulation, but according to the datasheet 
it was disabling it instead. I've left it the same, but changed the name 
of the define and the comment.

This card has Canyon-3D (ES1970MS-3D) written on the main chip, but it 
advertises itself as a 125d:1978, rev 10, which should be a Maestro-2E, 
so I've been looking at that datasheet...

As said, on this TerraTec SoundSystem DMX, version 1.2, I need the first 
patch at minimum. The second one also does the bit reversals, and works 
for me. Please apply?

Rene.