Forum: >>> Magnum BBS <<<

Mousecard IRQs and VBL

From Colin Leroy-Mira@21:1/5 to All on Thu May 8 11:52:29 2025

Hi,

In case anyone's interested. An investigation about a MAME bug helped
clear an apparently common misconception that the MouseCard's IRQ could
not be "really" synced to vertical blanking.

It can, and it is: https://www.colino.net/wordpress/en/archives/2025/05/08/yes-the-apple-ii-mousecard-irq-is-synced-to-the-vbl/

HTH,
--
Colin

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