Add Control Panel DA.

* Desktop pattern
* Double-click speed
* Joystick calibration
* Insertion point blink speed

Settings live in LCBANK1 at $FF80 and are persisted directly to DESKTOP2 when the DA closes. DeskTop itself is modified to pull values from there. IP blink routines are improved to not slow down when the mouse pointer is over the window.

Fixes #2, #31, #72

RELEASE-NOTES.md

@@ -37,6 +37,8 @@ https://github.com/inexorabletash/a2d/issues
 
 * This Apple
   * Gives details about the computer, expanded memory, and what's in each slot. (#29)
+* Control Panel
+  * Allows editing the desktop pattern (#31), double-click speed (#2), insertion point blink speed. Also shows joystick calibration. (#72)
 * Run Basic Here
   * Launch BASIC.SYSTEM with PREFIX set to the current window's pathname. (#42)
 * Key Caps

desk.acc/README.md

@@ -10,6 +10,8 @@ New desk accessories:
 
 * [This Apple](this.apple.s)
   * Gives details about the computer, expanded memory, and what's in each slot.
+* [Control Panel](control.panel.s)
+  * Modify DeskTop settings: desktop pattern, double-click speed, insertion point blink speed. Also shows joystick calibration.
 * [Eyes](eyes.s)
   * Eyes that follow the mouse.
 * [Screen Dump](screen.dump.s)
@@ -21,6 +23,8 @@ New desk accessories:
 * [Screen Saver](screen.saver.s)
   * Visual distractions.
 
+Note that the new desk accessories require an updated version of Apple II DeskTop and **will not work** with DeskTop 1.1 or MouseDesk.
+
 See [API.md](API.md) for programming details
 
 ## Files

desk.acc/TARGETS

@@ -8,3 +8,4 @@ screen.dump
 run.basic.here
 key.caps
 screen.saver
+control.panel