Use deferred VBI instead of immediate VBI. A deferred VBI won't be
called if the user program has interrupts disabled which makes it
easier to avoid race conditions.
Add "joystick mouse" driver and default mouse callback routine (not
using P/M graphics).
fix typo
Add drivers for ST mouse, Amiga mouse, and Atari trakball. Access
routines taken from old mouse.s.
When disabling interrupts, restore original interrupt flag afterwards.
small cleanup
another small cleanup
align comment to the same column
use ST mouse as static standard driver, too
add comment
fix some typos
Fix timer IRQ hooking for atarixl target.
Always print the mouse cursor, even if coordinates haven't changed.
This makes sure that the cursor is always visible, even if the program
has written text to the screen (only valid for non-P/M mouse callbacks).
Change display logic of mouse cursor (hide and show functions).
Adapt to new mouse driver interface ('prep' and 'draw')
Trakball mouse driver
Detect pen button. If we read 228 for X or Y position, don't change cursor
position, since the pen was probably lifted from the pad.
some comment fixes
fix bug where the high byte of X and Y positions were destroyed of
the user had lifted the pen
Always print the mouse cursor, even if coordinates haven't changed.
This makes sure that the cursor is always visible, even if the program
has written text to the screen (only valid for non-P/M mouse callbacks).