Re: [linuxdc-dev]Dreamcast sound and kernel memory

[Adrian M. <ad...@mc...>]

On Sunday 02 Dec 2001 11:49 pm, Adrian McMenamin wrote:
> Various fixes I have made still don't produce any sound.


I think I am finally going to admit defeat and write some ARM code. The 
hacked version of the assembler I used doesn't work - presumably because it 
simply locks the ARM in an endless loop.

The issue seems to be what the ARM processor is doing rather than any 
difficulty of writing to the ARM registers - if its stuck in an endless loop 
with interrupts off then I don't suppose it matters what values you poke its 
registers with :->

I can see how Dan Potter manges his IPC on the simple stuff and I'll simply 
copy that (or rather produce something similar to fit in with the OSS 
interface). It should produce a working driver of sorts in a day ot two.

It's not elegant - DP's code simply polls for any new commands, but as the 
ARM is not important in terms of executing anything in either user or kernel 
space, we can afford to be I think.

Assuming nobody leaps up to tell me I've got this all wrong I will start work 
tomorrow.

Will let you know how it goes.


Adrian