INT 33H 000dH: Enable Lightpen Emulation
Expects: AX 000dH
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Returns: none
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Info: This causes the mouse support to work with programs which are
written to support a light pen (e.g., using the PEN function on
BASIC). The mouse support apparently intercepts INT 10H 04H when
this feature is enabled.
When enabled, a click of either button is taken as a press of the
pen button at current mouse position.
Disable this support via INT 33H 000eH.
See Also: INT 33H: Mouse Support
Interrupts and BIOS Services
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