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POTxDAT
These addresses each read a pair of 8 bit pot counters.
(4 counters total). The bit assignment for both
addresses is shown below. The counters are stopped by signals
from 2 controller connectors (left-right) with 2 pins each.
BIT# 15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 00
RIGHT Y7 Y6 Y5 Y4 Y3 Y2 Y1 Y0 X7 X6 X5 X4 X3 X2 X1 X0
LEFT Y7 Y6 Y5 Y4 Y3 Y2 Y1 Y0 X7 X6 X5 X4 X3 X2 X1 X0
+--------------------------+-------+
| CONNECTORS | PAULA |
+-------+------+-----+-----+-------+
| Loc. | Dir. | Sym | pin | pin |
+-------+------+-----+-----+-------+
| RIGHT | Y | RX | 9 | 33 |
| RIGHT | X | RX | 5 | 32 |
| LEFT | Y | LY | 9 | 36 |
| LEFT | X | LX | 5 | 35 |
+-------+------+-----+-----+-------+
With normal (NTSC or PAL) horiz. line rate, the pots will
give a full scale (FF) reading with about 500kohms in one
frame time. With proportionally faster horiz line times,
the counters will count proportionally faster.
This should be noted when doing variable beam displays.
For Paddles:
X7-X0 Left Paddle counter (0 = completely CCW)
Y7-Y0 Right Paddle counter (0 = completely CCW)
For Proportional Joystic:
X7-X0 Horizontal counter (0 = stick pushed left)
Y7-Y0 Vertical counter (0 = stick pushed down)
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