#FIG 3.2  Produced by xfig version 2.3
Portrait
Center
Metric
A4
100.00
Single
-2
1200 2
2 1 0 1 0 7 50 -1 -1 0.000 1 0 -1 1 0 2
	1 1 1.00 90.00 180.00
	 1125 1350 1125 1800
2 1 0 1 0 7 50 -1 -1 0.000 1 0 -1 1 0 2
	1 1 1.00 90.00 180.00
	 1125 2250 1125 2700
2 1 0 1 0 7 50 -1 -1 0.000 1 0 -1 1 0 2
	1 1 1.00 90.00 180.00
	 1125 3150 1125 3600
2 1 0 1 0 7 50 -1 -1 0.000 1 0 -1 1 0 2
	1 1 1.00 90.00 180.00
	 1575 1800 1575 1350
2 1 0 1 0 7 50 -1 -1 0.000 1 0 -1 1 0 2
	1 1 1.00 90.00 180.00
	 1575 3600 1575 3150
2 4 0 1 0 7 51 -1 20 0.000 0 0 7 0 0 5
	 1800 1350 900 1350 900 900 1800 900 1800 1350
2 4 0 1 0 7 51 -1 20 0.000 0 0 7 0 0 5
	 1800 2250 900 2250 900 1800 1800 1800 1800 2250
2 4 0 1 0 7 51 -1 20 0.000 0 0 7 0 0 5
	 1800 4050 900 4050 900 3600 1800 3600 1800 4050
2 4 0 1 0 7 51 -1 20 0.000 0 0 7 0 0 5
	 1800 3150 900 3150 900 2700 1800 2700 1800 3150
2 1 0 1 0 7 50 -1 -1 0.000 1 0 -1 1 0 2
	1 1 1.00 90.00 180.00
	 1350 450 1350 900
2 1 0 1 0 7 50 -1 -1 0.000 1 0 -1 1 0 2
	1 1 1.00 90.00 180.00
	 1575 2700 1575 2250
4 2 0 50 -1 16 8 0.0000 4 105 270 1080 1485 want\001
4 2 0 50 -1 16 8 0.0000 4 120 255 1035 3285 stop\001
4 0 0 50 -1 16 8 0.0000 4 105 270 1665 3510 want\001
4 1 0 50 -1 16 10 0.0000 4 120 735 1350 1080 STOPPED\001
4 1 0 50 -1 16 10 0.0000 4 120 795 1350 3780 DISABLED\001
4 1 0 50 -1 16 10 0.0000 4 120 555 1350 2880 ACTIVE\001
4 1 0 50 -1 16 10 0.0000 4 120 540 1350 1980 READY\001
4 0 0 50 -1 16 8 0.0000 4 90 210 1665 2565 may\001
4 2 0 50 -1 16 8 0.0000 4 105 240 1035 2430 cant\001
4 1 0 50 -1 16 8 0.0000 4 120 240 1350 1260 R,!A\001
4 1 0 50 -1 16 8 0.0000 4 120 210 1350 2160 R,A\001
4 1 0 50 -1 16 8 0.0000 4 120 240 1350 3060 !R,A\001
4 1 0 50 -1 16 8 0.0000 4 120 270 1350 3960 !R,!A\001
4 0 0 50 -1 16 8 0.0000 4 120 255 1665 1710 stop\001
4 0 0 50 -1 16 10 0.0000 4 150 855 2520 1125 R=ready flag\001
4 0 0 50 -1 16 10 0.0000 4 150 885 2520 1290 A=active flag\001
4 0 0 50 -1 16 10 0.0000 4 150 1365 2520 2475 fd_want sets A flag\001
4 0 0 50 -1 16 10 0.0000 4 150 1440 2520 2640 fd_stop clears A flag\001
4 0 0 50 -1 16 10 0.0000 4 150 1905 2520 3300 update() updates the poller.\001
4 0 0 50 -1 16 10 0.0000 4 150 2190 2520 2970 fd_cant clears R flag (EAGAIN)\001
4 0 0 50 -1 16 10 0.0000 4 150 2115 2520 3135 fd_rdy sets R flag (poll return)\001