A600 8Mb fast expansion

[Piru]

@alexh

24-bit = 16Mb

Of which 8MB is available in linear fashion for Autoconfig(TM).

9.5MB would be possible if some of the memory would occupy some other memory areas.

[Piru]

@alexh

I was wondering if you could add a register that when you write a particular value to it, it stops decoding addresses in the upper 4 Mbyte range.

You could then switch on/off the upper 4Mbytes in software.

card.resource checks for existance of the memory at address 0x600000. If any is present, it will not initialize the resource. Thus, even if you could turn off the memory later on, it would not bring PCMCIA back.

If the state would survive a reboot then it would work, naturally.

[Piru]

@countzero

I wonder if it would be possible to hack card.resource to map this area instead of 200000-9FFFFF.

Not with software only.