Minesweeper in TI-BASIC

This is one of the first programs I ever wrote, provided here for fun and safekeeping.

I wrote it on the TI-83+, but it should work on any TI Z80 calculator. Here's a shot of it in action:

Dimensions

The board is 9×19, with 33 mines.

Controls

• ▲▼◀▶ move cursor
• 2nd reveal square (left click)
• ALPHA flag or unflag mine (right click)
• Y= show # of mines remaining
• OFF exit