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Mousecard IRQs and VBL

From Colin Leroy-Mira <colin@colino.net>
Newsgroups comp.sys.apple2.programmer
Subject Mousecard IRQs and VBL
Date 2025-05-08 11:52 +0200
Organization A noiseless patient Spider
Message-ID <20250508115229.200932b1@colino.net> (permalink)

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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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Mousecard IRQs and VBL Colin Leroy-Mira <colin@colino.net> - 2025-05-08 11:52 +0200

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