Re: PC-card (4)
Date: 2001-04-12 22:15:37

Hallo David, Nicolas,

> > I think, if you enable Ultimax mode, there is no RAM that can be 
> written to.
> > This way you can use about every memory location above $1000 to map in 
> your
> > own I/O. I just wonder if the SCPU is compatible with this mode.
> After _very_ careful interpretation of the PLA's reverse-engineered
> sourcecode, Bogax and I have decided that unless you're writing to the I/O
> page, you can't not write to ram.  The only thing that throttles the WE 
> line
> on the internal dram is the I/O outputs on the PLA

The only thing I know, and even that could be wrong, is that Ultimax is a 
"way" to replace the Kernal with an external one.

Could someone give me some more info/docs/URLs about this subject, please?

Groetjes, Ruud

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