Re: Legacy I/O ports and text mode

Hi,

> Then I included the same code into Cromwell, but nothing happened.
> I have no idea why - perhaps the Linux framebuffer driver "xboxfb"
> does some setup that is required? The driver does not seem to do
> any Port- I?o anyway, but it does access many MMIO ports. Perhaps
> someone can help?

As far as I understand it the legacy IO registers are mirrored in the 
"PCIO" MMIO-ports. So basically all calls to VGA_WR08 and VGA_RD08 
that use the PCIO-ports could be done on the legacy ports as well, 
once they are active. 

On the other hand that means that all the wonderfull stuff which is 
done using VGA_WR08 and VGA_RD08 in xboxfb may possibly influence the 
behaviour of the legacy ports.

Another problem you may face sooner or later is the missing VGA BIOS, 
as it usually contains the font definition for text mode. So you'll 
have to find out how to supply your own font once the text mode is 
enabled.

/Oliver



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