sio => uart: one port is gone

Ian Smith smithi at
Mon Sep 15 14:36:07 UTC 2008

On Mon, 15 Sep 2008, Andriy Gapon wrote:
 > This is a fairly standard and old machine with 2 COM ports.
 > Recently (last Friday) I decided to update my RELENG_7 system and also
 > to transition from sio to uart.
 > This what I had before the upgrade:
 > kernel: sio0: <16550A-compatible COM port> port 0x3f8-0x3ff irq 4 flags
 > 0x10 on acpi0
 > kernel: sio0: type 16550A
 > kernel: sio0: [FILTER]
 > kernel: sio1: <16550A-compatible COM port> port 0x2e8-0x2ef irq 3 on acpi0
 > kernel: sio1: type 16550A
 > kernel: sio1: [FILTER]
 > This is what I have now:
 > uart0: <16550 or compatible> at port 0x3f8-0x3ff irq 4 flags 0x10 on isa0
 > uart0: [FILTER]
 > This is what I have in device.hints for uart:
 > hint.uart.0.port="0x3F8"
 > hint.uart.0.flags="0x10"
 > hint.uart.0.irq="4"
 > hint.uart.1.port="0x2F8"

but it's shown as 0x2e8 above ..

 > hint.uart.1.irq="3"
 > Precisely the same hints (s/uart/sio/) I had for sio.

0x2f8 is 'standard COM2' address .. did sio1 work ok at 0x2e8 before?

cheers, Ian

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