Use autotools, move altos to src subdir Signed-off-by: Keith Packard <keithp@keithp.com>
Make some functions reentrant to save DSEG space
Move beep_init to end of file to be consistent with other files
Fix GPL version at 2 Signed-off-by: Keith Packard <keithp@keithp.com>
Add beep/led support. Support our P2_0 connected buzzer, and formalize LED output support. Signed-off-by: Keith Packard <keithp@keithp.com>