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    Subject: ISA Proxy - possible?
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> Subject: 
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> ISA Proxy - possible?
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> Date: 
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> Tue, 19 Jun 2007 14:01:50 +0200
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> Would it be possible to register a set of io ports and io memory locations 
> with qemu and have all read write operations passed on to the host system? 
>
> A quick look at the source shows me the two look-up tables
> IOPortReadFunc *ioport_read_table[3][MAX_IOPORTS];
> IOPortWriteFunc *ioport_write_table[3][MAX_IOPORTS];
> Instead of the default function (which just generates debug output) it should 
> be possible to register functions which call the ioport read/write commands 
> on the host system (qemu would have to be launched as root to acquire io 
> permissions). 
>
> Same should work with io memory using the cpu_register_io_memory function.
> Or am I far off base?
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> Reason is that I'd like to emulate some very old linux installations which 
> access custom ISA hardware. For some of the ISA boards we have no source 
> code, only binaries linked to a 2.0.something kernel...
>
> Daniel Schwen
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