subvergeMouse
A PS/2 mouse works on the text screen. The pointer is one cell drawn with its colours inverted, and it moves in whole cells. The controller and the packets are described in the PS/2 controller.
What the mouse does
- A click on a tab title in the top bar switches to that tab.
- In the help viewer a click follows a link or runs a line of code, the wheel scrolls and a right click goes back (help).
Words
| Word | Effect | |
|---|---|---|
mouse |
-- x y buttons |
the pointer cell and the buttons |
mouse? |
-- 1/0 |
1 when a mouse was found at boot |
x and y count from the top-left cell of the tab's area, so y is one less than the screen row, and y is -1 over the top bar. buttons is the sum of 1 for the left button, 2 for the right button and 4 for the middle button:
mouse? . 1
mouse . . . buttons, then y, then x
A mouse that reports a wheel is detected at boot. One that doesn't answer is left unused, and mouse? is 0. Under QEMU the pointer follows the host mouse after the first click in the QEMU window, and Ctrl-Alt-G releases it.