| IOAT(4) | Kernel Interfaces Manual | IOAT(4) | 
ioat0   at isa? port 0x220 irq 5
com2    at ioat? slave ?
com3    at ioat? slave ?
com4    at ioat? slave ?
com5    at ioat? slave ?
com6    at ioat? slave ?
com7    at ioat? slave ?
Each ioat device is the master device for up to six com devices. The kernel configuration specifies these com devices as slave devices of the ioat device, as shown in the synopsis. The slave ID given for each com device determines which bit in the interrupt multiplexing register is tested to find interrupts for that device. The port specification for the ioat device is used to compute the base addresses for the com subdevices. The port for the interrupt multiplexing register is not programmable.
| January 24, 2000 | NetBSD 7.0 |