ThinkPad T21: sio0 detected as 8250 UART

James Long james_mapson at
Wed Aug 6 21:44:04 PDT 2003

Is this correct?  I can't find any specs on the IBM website which
specify what UART the serial port uses/emulates, but FreeBSD thinks
its an 8250:

sio0: configured irq 4 not in bitmap of probed irqs 0
sio0 at port 0x3f8-0x3ff irq 4 flags 0x10 on isa0
sio0: type 8250

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