mcd
—
Mitsumi CD-ROM driver
mcd0 at isa? port 0x300 irq 10
options MCD_PROMISC
The mcd
driver provides support for Mitsumi CD-ROM
controller and drive on the isa(4)
bus.
- /dev/cd[0-9][a-h]
- block mode Mitsumi CD-ROM devices
- /dev/rmcd[0-9][a-h]
- raw mode Mitsumi CD-ROM devices
The mcd
hardware is difficult to probe accurately.
Historically, the mcd
probe would accept any return
values as indicating that an mcd
drive was present.
Other devices, particularly ne(4) or
we(4), would then be incorrectly
claimed by the mcd
driver. The driver now only accepts
result codes known to indicate Mitsumi-compatible CD controllers, but may
reject some mcd
hardware which returns other result
codes.
options MCD_PROMISC
enables the original
promiscuous probe behaviour. Use with extreme caution.