??About hardware mapped memory

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odNewby

??About hardware mapped memory

Post by odNewby »

How to deal with those hardware mapped memory like Video RAM in a000:0000(esp.in pmode)? If unknown hardware just map anything in physical memory out of protection,the system may CRASH!
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The_Legend

Re: ??About hardware mapped memory

Post by The_Legend »

As far as I know, you won't find hardware mapped memory not over the 1MB-Mark (not sure about PCI-Hardware ...).
Don't use that memory area until you have probed the complete hardware of the computer.
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Tim

Re: ??About hardware mapped memory

Post by Tim »

Use the BIOS int 15h memory map to work out which memory you can use. There are all kinds of complications arising from ROMs and device memory, not just below 1MB.
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