MCD(4) | Device Drivers Manual | MCD(4) |
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.
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.
November 29, 1994 | NetBSD 10.99 |