[alsa-devel] [PATCH] ALSA: Support Media Vision Jazz16 chips

Rene Herman rene.herman at gmail.com
Wed Mar 28 01:11:35 CEST 2007

On 03/27/2007 10:14 PM, Rask Ingemann Lambertsen wrote:

(dropped Adam Belay from the CC)

> Texas Instruments/Acer TravelMate 5000 series has one on-board. 
> Interestingly, the User's Reference Guide lists 1, 3, 5 and 7 as
> valid DMA channels for both 8-bit and 16-bit playback. Since the chip
> is only capable of half-duplex AFAIK, why have two DMA channels? What
> am I missing?

Nothing much I'd say. As far as I know, the card's half-duplex. I just 
now installed the Media Vision DOS driver (*) and it allows the 
following settings. Defaults starred:

Jazz I/O Port:		210, *220, 230, 240, 250, 260 (<-- align 10?)
Jazz IRQ:		2, 3, *5, 7, 10, 15
8 bit DMA:		*1, 3
16 bit DMA:		1, 3, *5, 7
MPU-401 Enable:		Yes (<-- yes, no "No")
MPU-401 I/O Port:	300, 310, 320, *330
MPU-401 IRQ:		*2, 3, 5, 7 (<-- you're also listing 10 and 15?)
CD ROM Port:		320, *340

That "CD ROM Port" seems to be a version glitch; mine only has an NCR 
SCSI chip with a 2x8 pin connector but the install asked  me if I had a 
Sony, Panasonic or Mitsumi CD-ROM (those old proprietary CD-ROM interfaces).

Not much idea what that 1 and 3 are doing under "16-bit DMA". Things do 
seem to work when I pick 1 for the 8-bit and 3 for the 16-bit. But the 
DOS drivers at least don't list 5 and 7 as valid 8-bit DMAs...

(*) This driver: http://members.home.nl/rene.herman/jazz16.img

1440K FAT floppy image.

Would you happen to have a description of the DIP switches/jumpers? On 
mine, there's a red block of 8 DIP switches marked

MAB0 | MAB1 | DISMPU | DAB2 | DAB1 | DAB0 | DISJS | <empty>

which with the exception of the two DIS switches isn't completely 
self-evident; especially not since the chip's not on the bus before 
being programmed to be through software. There's also two 2x3 jumper 
blocks J10 and J11 that I've no idea about.


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