1This is a first attempt to create an `improved' driver for the Mitsumi drives.
2It is able to "live together" with mcd.c, if you have at least two Mitsumi
3drives: each driver can use its own drive.
4
5To allow this "coexistence" as long as mcdx.c is not a superset of mcd.c,
6this driver has to use its own device files. We use MAJOR 20 for it. So,
7you have to do
8
9 # mknod /dev/mcdx0 b 20 0
10 # mknod /dev/mcdx1 b 20 1
11
12and so on, one entry for each drive to support, once.
13
14If you are using the driver as a module, you can specify your ports and IRQs
15like
16
17 # insmod mcdx.o mcdx=0x300,11,0x304,5
18
19and so on ("address,IRQ" pairs).
20This will override the configuration in mcdx.h.
21
22This driver:
23
24    o   handles XA and (hopefully) multi session CDs as well as
25        ordinary CDs;
26    o   supports up to 5 drives (of course, you'll need free 
27        IRQs, i/o ports and slots);
28    o   uses much less kernel memory than the standard mcd driver
29        (no extra driver internal buffers!).
30    o   plays audio (like the `old' driver, I hope)
31
32This version doesn't support yet:
33
34    o   shared IRQs (but it seems to be possible - I've successfully
35                connected two drives to the same irq.  So it's `only' a 
36                problem of the driver.)
37
38This driver never will:
39
40    o   Read digital audio (i.e. copy directly), due to missing
41        hardware features. 
42
43
44heiko@lotte.sax.de
45