Motherboard chipsets that support D-DMA

Discussion about old sound cards, MIDI devices and sound related accessories.

Re: Motherboard chipsets that support D-DMA

Postby cyclone3d » 2018-12-04 @ 22:16

j^aws wrote:^^ You don't have this chipset on the list:

SiS 600/5595

I've tested this with SB-Link and IIRC, S-IRQ and PC/PCI DMA settings, so should have a fallback for DDMA.


Yeah, all of them with the 5595 south bridge should work. Thanks for the heads up on the north bridge though.
User avatar
cyclone3d
l33t
 
Posts: 2331
Joined: 2015-4-08 @ 06:06
Location: Huntsville, AL USA

Re: Motherboard chipsets that support D-DMA

Postby Kamerat » 2018-12-05 @ 03:19

appiah4 wrote:ICH 5 and earlier support DDMA AFAIK but onwards is nono?

There's no mention of DDMA in the datasheets of the original ICH and ICH5. The datasheet of the PIIX4 southbridge has a lot of information regarding DDMA, so it should also work on the LX chipset.
User avatar
Kamerat
Oldbie
 
Posts: 856
Joined: 2014-3-14 @ 19:09
Location: Oslo, Norway

Re: Motherboard chipsets that support D-DMA

Postby Kamerat » 2018-12-05 @ 03:23

Baoran wrote:Any chance to get VIA VT8237 southbridge to work without dsdma?

There's no mention of DDMA in the datasheets for VT8237R but the southbridge itself actually got pins for PC/PCI and serial IRQ signals but I'm pretty sure that no motherboard exists with a PC/PCI connector.
User avatar
Kamerat
Oldbie
 
Posts: 856
Joined: 2014-3-14 @ 19:09
Location: Oslo, Norway

Re: Motherboard chipsets that support D-DMA

Postby LSS10999 » 2018-12-05 @ 06:32

Kamerat wrote:
appiah4 wrote:ICH 5 and earlier support DDMA AFAIK but onwards is nono?

There's no mention of DDMA in the datasheets of the original ICH and ICH5. The datasheet of the PIIX4 southbridge has a lot of information regarding DDMA, so it should also work on the LX chipset.


ICH southbridges do not have DDMA. This document already mentioned about it.

2.1.1.1 Distributed DMA

Distributed DMA is not supported in any of Intel’s I/O Controller Hub variants.
LSS10999
Member
 
Posts: 119
Joined: 2009-10-28 @ 14:32

Re: Motherboard chipsets that support D-DMA

Postby Kamerat » 2018-12-05 @ 07:36

LSS10999 wrote:ICH southbridges do not have DDMA. This document already mentioned about it.

2.1.1.1 Distributed DMA

Distributed DMA is not supported in any of Intel’s I/O Controller Hub variants.

Thank's for the link, should be added to the first post.
User avatar
Kamerat
Oldbie
 
Posts: 856
Joined: 2014-3-14 @ 19:09
Location: Oslo, Norway

Re: Motherboard chipsets that support D-DMA

Postby Baoran » 2018-12-14 @ 22:20

cyclone3d wrote:So looking into chipsets that support DDMA but that don't work in practice at least on some motherboards, I am thinking that DDMA is not being enabled by the BIOS.

This looks to be a possible issue with some VIA chipset based motherboards at least. I have not looked into other chipsets yet.

I'm going to see if I can make a utility that will change the register settings to enable DDMA on these chipsets when they don't work by default.

I wonder if PCISet or WPCREDT/WPCRSET would be able to do this.... going to test and see if it does. If it does, then that would make it that much easier to make a stand-alone utility just for this purpose.


Any luck figuring out if you can enable ddma in the via chipsets?
Baoran
Oldbie
 
Posts: 1080
Joined: 2017-4-01 @ 08:39
Location: Finland

Previous

Return to Sound

Who is online

Users browsing this forum: No registered users and 2 guests