** Here is the firmware of the 1570, 1571 and 1571CR drives.  There are some
** differences between these drives.  The 1570 is single-sided, while the
** others are double-sided.  See the README file for details.

schematics/
  Schematic diagrams

1570-rom.315090-01.bin
  The firmware of a 1570 disk drive.  The board may say "1571 disk", but
  the 1570 and 1571 were very similar anyway, the most remarkable difference
  being that the 1570 has single-sided drive mechanism.

1571-rom.310654-03.bin
  The firmware of a 128D's built-in 1571 disk drive, or of a stand-alone 1571.
1571-rom.310654-05.bin
  An upgrade of the above.  Corrects the bug of 310654-03 that moves the
  R/W head between each sector when writing on the disk's top side.

1571cr-rom.318047-01.bin
  The firmware of a 128DCR's built-in 1571CR disk drive.

