This is a small fix for 'AMI_ATX.lha' (by Rafal 'MASTER' Siedlaczek). Rafal
has kindly given me source files and permission to modify and upload them.
This fix solves the problem of incompatibility with X-Copy and similar
programs: they would turn off the amiga, because AMI_ATX used a signal
driveselect for software shutdown.

The fix uses same signal, but requires a series of ones and zeros, to avoid
unwanted shutdown. I modified some timeouts, too. Now it waits 1sec instead of
2sec after poweroff button signal.

Archive also contains an external floppy drive pinout and related information.
Only the PIC_16F628 hex file is provided (no 16F84A as I couldn't test it).
The original archive (AMI_ATX.lha) is required as it contains schematics and
other info.

Because of its simplicity, this fix (and the original) should work on any
Amiga. I have tested it on A1200 with BPPC, and it works in both OS3.9 and
OS4.0. Still, I'm not sure if using driveselect this way is ok.  It might be a
good idea to remove diskettes from drives before using software shutdown.

PERMISSION  UID  GID    PACKED    SIZE  RATIO METHOD CRC     STAMP     NAME
---------- ----------- ------- ------- ------ ---------- ------------ ----------
[generic]                  724    1246  58.1% -lh5- fc5c May 12  1980 AMI_ATX_fix/AMI_ATX_fix.readme
[generic]                  589    1359  43.3% -lh5- 1d71 May 11  1980 AMI_ATX_fix/pinout.txt
[generic]                 1887    2628  71.8% -lh5- 9b4b Apr 28  1980 AMI_ATX_fix/program/aaoff2
[generic]                  329     574  57.3% -lh5- 02b1 Apr 28  1980 AMI_ATX_fix/program/aaoff2.c
[generic]                  633    1827  34.6% -lh5- 51d4 Apr 29  1980 AMI_ATX_fix/program/AMI_ATX(16F628).hex
[generic]                  589    1924  30.6% -lh5- 4b40 Feb  7  1980 AMI_ATX_fix/program/AMI_ATX.mpas
---------- ----------- ------- ------- ------ ---------- ------------ ----------
 Total         6 files    4751    9558  49.7%            May 14 22:00