On Sat, Jan 17, 2026 at 11:58:53AM -0800, Greg Steuck wrote:
> Thank Jonathan!
>
> Jonathan Gray <jsg@jsg.id.au> writes:
>
> >> Question: Is there any way to redirect kernel console to com4 after PCI
> >> is up, or is console device fixed at boot? If it's fixed, I presume
> >> that's a fundamental limitation?
> >
> > find the address for the uart io bar with pcidump -v
>
> 0:26:0: Intel C3000 UART
> 0x0000: Vendor ID: 8086, Product ID: 19d8
> 0x0004: Command: 0147, Status: 0010
> 0x0008: Class: 07 Communications, Subclass: 00 Serial,
> Interface: 02, Revision: 11
> 0x000c: BIST: 00, Header Type: 80, Latency Timer: 00,
> Cache Line Size: 00
> 0x0010: BAR io addr: 0x0000e060/0x0008
> 0x0014: BAR mem 32bit addr: 0xdf519000/0x00000100
>
> > then at the boot prompt or in /etc/boot.conf
> > machine comaddr 0x...
>
> machine comaddr 0x0000e060/0x0008
the '/0x0008' is not needed
> stty com4 9600
> set tty com4
> boot
>
> Works like a charm!
>
>
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