add joy(1): joystick script for all emulators, and docs

remove old /sys/src/games/nes/joynes in favor of joy(1).
joy(1) has more buttons for the other emulators;  there is
no longer a significance in the order of the keys.
document nusb/joy, add information in each emulator manpage.

1 files changed, 39 insertions, 0 deletions

diff --git a/rc/bin/joy b/rc/bin/joy
new file mode 100755
index 000000000..47a0fe4c0
--- /dev/null
+++ b/rc/bin/joy
@@ -0,0 +1,39 @@
+#!/bin/rc
+# usage: nusb/joy epX.Y | joy [N]
+~ $#* 0 && *=''
+awk -safe -v 'joy='$1 '
+	/^axis 0 0/   { k[0] = "left " }
+	/^axis 0 255/ { k[0] = "right " }
+	/^axis 0 128/ { k[0] = "" }
+
+	/^axis 1 0/   { k[1] = "up " }
+	/^axis 1 255/ { k[1] = "down " }
+	/^axis 1 128/ { k[1] = "" }
+
+	/^down 1$/ { k[3] = "b " }
+	/^down 5$/ { k[2] = "a " }
+	/^down 6$/ { k[8] = "x " }
+	/^down 2$/ { k[9] = "y " }
+	/^down 3$/ { k[4] = "control " }
+	/^down 4$/ { k[5] = "start " }
+	/^down 7$/ { k[6] = "l1 " }
+	/^down 8$/ { k[7] = "r1 " }
+
+	/^up 1$/ { k[3] = "" }
+	/^up 5$/ { k[2] = "" }
+	/^up 6$/ { k[8] = "" }
+	/^up 2$/ { k[9] = "" }
+	/^up 3$/ { k[4] = "" }
+	/^up 4$/ { k[5] = "" }
+	/^up 7$/ { k[6] = "" }
+	/^up 8$/ { k[7] = "" }
+
+	{
+		if(joy != "")
+			printf "joy%s ", joy
+		for(i in k)
+			printf k[i]
+		printf "\n"
+		fflush
+	}
+'