       OPEN PARAMETERS for multidisk.device:

Software interface to multidisk.device is similar to that of
trackdisk.device with one big difference:

It supports 15 diskformats.

Opening a device requires you to pass two parameters, a unitnumber
and a flag field.

The unitnumber is 0 or 1 for one of the two floppies connected to
the cable.

The flagfield is used to pass the format and device flags:

formatnumbers:
 0  AMIGA DD disk       880kB    3.5"  DD
 1  AMIGA HD disk      1760kB    3.5"  HD
 2  MS-DOS DD disk      720kB    3.5"  DD
 3  MS-DOS HD disk     1440kB    3.5"  HD
 4  ATARI 10 sector     800kB    3.5"  DD
 5  ATARI 11 sector     880kB    3.5"  DD <not tested>
 6  C64 1581 disk       800kB    3.5"  DD
 7  EXTRA HD      :-)  2380kB    3.5"  HD
 8  MS-DOS HD 20 sec   1600kB    3.5"  HD
 9  MAC DD              800kB    3.5"  DD
10  MAC DD single-dided 400kB    3.5"  DD <read-only>
11  MS-DOS DD disk      640kB    3.5"  DD (256 byte sectors, 82 cyls)
12  MS-DOS HD disk     1640kB    3.5"  DD (10 1024 byte sectors, 82 cyls)
13  MS-DOS HD disk     1804kB    3.5"  DD (11 1024 byte sectors, 82 cyls)
14  MS-DOS HD disk     1968kB    3.5"  DD (12 1024 byte sectors, 82 cyls)


16  C64 1541 disk :-)   170kB    5.25" DD (40 tracks allowed, makes more than 170k)
17  MS-DOS 1200        1200kB    5.25" HD
18  MS-DOS 360          360kB    5.25" DD
19  AMIGA 880           880kB    5.25" DD
20  MS-DOS 720          720kB    5.25" DD <not tested>
21  MS-DOS 180          180kB    5.25" DD <not tested>
22  Apple II e          140kB    5.25" DD <read-only>
23  Atari 800XL         130kB    5.25" DD <read-only>
24  Atari 800XL Enh-D   360kB    5.25" DD <read-only>
25  C64 1571 disk       340kB    5.25" DD <wite not tested>


32  AMIGA DD disk       913kB    3.5"  DD <not tested>, 83 cyls
33  AMIGA HD disk      1826kB    3.5"  HD <not tested>, 83 cyls
34  MS-DOS DD disk      747kB    3.5"  DD <not tested>, 83 cyls
35  MS-DOS HD disk     1494kB    3.5"  HD <not tested>, 83 cyls
36  ATARI 10 sector     830kB    3.5"  DD <not tested>, 83 cyls
37  ATARI 11 sector     913kB    3.5"  DD <not tested>, 83 cyls



add 256 to flags to make device reset-proof (device ONLY, no DOSnodes)
   <this is used by the tool 'bootCAT'>
add 512 to flags to toggle HDselect bit on floppy (for old 5.25"s)
   <HDselect-toggle not implemented yet>


known bugs:
  - mounting multidisk.device without the hardware may cause trouble.
     An Amiga 3000 or 4000 may stop completely in the harware detection.
  - setting resetproof may fail or crash on expansion RAMs and turboboards
     Those boards do not meet the Commodore specs on the membits.
  - only one CATweasel supported. (Relates to the first bug)
  - no floppy detect. If no drive is present, it does open the unit anyway.

unsolveable bugs:

  - it is not possible to detect 3.5" or 5.25" drive by hardware.
    it is your task to use correct mountlists only. The installscript
    will help you a little. Using wrong mountlists (eg. AMIGA 1760kB 3.5"
    format on a 5.25" drive) will simply produce a lot of unreadable
    disks...
  - You cannot read the backside of a double-sided C64 1541 disks or
    an Apple IIe disks written on the original system by flipping
    them. There is no way to solve the problem by modifying our
    controller or driver. (We tried it, believe us!)
    If your drive does not allow you to read the back of those disks,
    your DRIVE must be modified...  :-(
