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Why use VIA in Mockingboard?
- Subject: Why use VIA in Mockingboard?
- From: "Alex Freed" <alexf@mirrow.com>
- Date: Tue, 22 Aug 2006 01:23:56 -0700
- Newsgroups: comp.sys.apple2
- Xref: g2news2.google.com comp.sys.apple2:11652
Here is a question to anyone who programmed a Mockingboard:
why were 6522 (VIA) chips used in the design? VIA is normally used to
add bidirectional ports to a microprocessor, but the sound chip itself
(AY-3-8910)
added 2 ports. And certainly didn't need a VIA to be interfaced from an
Apple 2
slot. VIA also has a timer (if not 2). Was it used for anything musical?
-Alex.