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Mockingboard, Phasor, NMI, etc.
- Subject: Mockingboard, Phasor, NMI, etc.
- From: Linards Ticmanis <ticmanis@gmx.de>
- Date: Sat, 10 Jun 2006 22:10:12 +0200
- Newsgroups: comp.sys.apple2
- Organization: Arcor
- User-agent: Thunderbird 1.5 (X11/20060317)
- Xref: g2news2.google.com comp.sys.apple2:9097
Hello,
some questions arising from work on AppleWin:
1.) Does anybody know of any piece of A2 software that uses the
Mockingobard's ability to cause NMI (as opposed to IRQ) through the
second 6522? Is this feature even existent in the old MBs, or is it a
"feature" only of the recent clones?
2.) What about the Phasor? does it have any of its 6522s wired to the
NMI line? If so, which? And are the others all wired to IRQ?
3.) The speech chip on Phasor... where is its IRQ output wirded? to the
6522 or directly to the Apple Bus?
If any of the few people who actually own a Phasor could check this,
it'd be a great help.
--
Linards Ticmanis