[Qemu-devel] Re: Audio output for CS4231, patch/RFC

[Blue Swirl]

> One comment: you could move the DMA related functions and registers to 
> sparc32_dma.c because it seems reasonnable that the DMA stuff was really 
> implemented outside of the cs4231 chip (I believe the same chip was used in 
> some PC cards with an ISA based DMA).

I had thought about that, but the CS and DMA registers are located in nearby 
addresses. Cleanest solution from the driver point of view would be that 
Qemu handled the case correctly where several drivers register 
non-overlapping memory areas of less than one page size within the same 
page. That way the DMA controller could reside in sparc32_dma.c and not know 
anything about CS registers and vice versa.

Looks like the PC cards were called Windows Sound System compatible and 
there were several manufacturers in the early '90s.

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