Interrupt Timings
-----------------
Michael Vincent - michael@radicalsoft.org


** INTRODUCTION

The TI-83+ hardware generates interrupts approximately 150 times per second. This rate can be modified through software commands. Port 4 is the interrupt port.

** CHANGING THE SPEED

Note that bcall(_getkey) will disable speed changes.

To set the speed:

di
ld a,<<PUT SPEED HERE>>
out (4),a
ei

Replace <<PUT SPEED HERE>> with the appropriate value:

Normal speed interrupts: %00000110
Faster speed interrupts: %00000100
Even faster speed interrupts: %00000010
Fastest speed interrupts: %00000000