Re: APUS bus access

[Sven L. <lu...@dp...>]

On Tue, Jul 18, 2000 at 07:57:36AM -0400, fh...@at... wrote:
> In <200...@su...>, on 07/18/00 
>    at 01:21 PM, gri...@ps... (Arno Griffioen) said:
> 
> >Is there another register which you can abuse in some way? Is there
> >perhaps a status/control register which will enable you to test some
> >read/write actions by flipping some bits? 
> 
> Yes.  There may be some.  I was browsing the programmers manual last
> night.  There are some various debugging registers.
> 
> BTW  Gerard said the driver should be MMIO and not IO_MAPPED. I may try
> turning off I/O mapped and see what happens.  He also said he would have
> liked to work on MMIO, on non-PC hardware I presume, but has no hardware
> to do the work.  Does anyone have any ideas on MMIO vs IO MAPPED?  On
> first thought I'm not sure I understand the differences.

Is not mmio when you see the registers as one big memory chunk, like we are
used to on amiga, and io_mapped, when you see the register as a pair address +
data to be passed to the device like they used to do on pc hardware ?

Friendly,

Sven LUTHER