Messages in this thread |  | | | Date | Fri, 18 Jan 2008 13:10:29 -0500 | | From | "H. Peter Anvin" <> | | Subject | Re: [patch 2/2] 8250_pnp: register x86 COM ports at the conventional ttyS names |
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Rene Herman wrote: > > The number of places expected to contain something sensible should I > believe first be verified at 0x410 -- the equipment word. Bits 11-9 > (0x0e00) should be the number of serial ports, 0 to 4 (so 5-7 is also a > sanity check) and if BIOSes can be expected to zero out the non-used > base-addresses (at 0x400, 0x402, 0x404, 0x406) that's another sanity > check. Don't know if they can though... >
Probably not. However, the ports marked valid should be nonzero and aligned-8.
-hpa
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