Floppsy: Changes for apple2 interface & output enable

[jepler]

GW and fluxengine host software will need changes to get Apple Disk ][ fluxing working again, but with a 1-liner change, GW v1.21 can talk to floppsy and see flux on a Disk ][....

diff --git a/src/greaseweazle/tools/util.py b/src/greaseweazle/tools/util.py
index 25cb4e7..33c2316 100644
--- a/src/greaseweazle/tools/util.py
+++ b/src/greaseweazle/tools/util.py
@@ -125,6 +125,7 @@ class Drive:
             '0': (USB.BusType.Shugart, 0),
             '1': (USB.BusType.Shugart, 1),
             '2': (USB.BusType.Shugart, 2),
+            'APPLE2': (USB.BusType.Apple2, 0),
         }
         if not letter.upper() in types:
             raise argparse.ArgumentTypeError("invalid drive letter: '%s'"

You have to use --tracks step=4 because our GW-compatible firmware steps 1/4 track each time a step is commanded.

I had a random floppy left over in the drive and it reads consistently but with errors:

$ gw read --drive APPLE2 --format apple2.nofs.140 /tmp/apple2.img  --device /dev/serial/by-id/usb-Adafruit_Floppsy_E4634012C72D5B24-if00  --tracks step=4
…
Cyl-> 0         1         2         3    
H. S: 01234567890123456789012345678901234
0. 0: .X....X..X.XX.XX.XX.XX.XX.X..X.XX.X
0. 1: .X..X..X.X..X.XX.XX.XX.XX.XX.XX.X..
0. 2: .XX.XX.X..X....X..X.XX.XX.XX.XX.XX.
0. 3: .XX.XX.XX.XX.X....XX.X..X.XX.XX.XX.
0. 4: ..X.XX.XX.XX.XX.XX.X....X..X.XX.XX.
0. 5: .....X.XX.XX.XX.XX.X..XX.X..X.XX.XX
0. 6: X..X....X..X.XX.XX.XX.XX.XX.X..X..X
0. 7: .X.X..X..X....X..X.XX.XX.XX.XX.XX.X
0. 8: XX.XX.X..X..X..X.X..X.XX.XX.XX.XX.X
0. 9: XX.XX.XX.XX.XX.X..X..X.XX.X.XX.XX.X
0.10: .X..X.XX.XX.XX.XX.XX.X..X..X.XX.X.X
0.11: ..X....X..X.XX.XX.XX.XX.XX.X..X.XX.
0.12: X.X..X..X.X..X..X.XX.XX.XX.XX.XX.X.
0.13: X.XX.XX.X..X..X.X..X.XX.XX.XX.XX.XX
0.14: X.XX.XX..X.XX.X..X....X..X.XX.XX.XX
0.15: X..X.XX.XX.XX.XX.XX.X..X.XX.X.XX.XX
Found 264 sectors of 560 (47%)

[jepler]

Now I can write & read a whole floppy in the Disk ][.