Intel D2500CC motherboard and strange RS232/UART behavior
    Poul-Henning Kamp 
    phk at phk.freebsd.dk
       
    Fri Apr 12 13:20:47 UTC 2013
    
    
  
In message <98147894.20130412171822 at serebryakov.spb.ru>, Lev Serebryakov writes
:
> I mean, there is no good way to distinguish between this (hardware)
> implementation and "true" 4 single UART chips, when it is identify
> itself as "generic 16550 UART", 4 times, at 4 I/O addresses.
That is a kernel configuration issue entirely separate from the
question about the hardware being built to allow and support
interrupt sharing in the first place.
Many old ISA cards also were not recognizable and required hint'ing,
for the exact same reason.
-- 
Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
phk at FreeBSD.ORG         | TCP/IP since RFC 956
FreeBSD committer       | BSD since 4.3-tahoe    
Never attribute to malice what can adequately be explained by incompetence.
    
    
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