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Re: A2MP3 auction to benefit @rsuenaga scholarship
- Subject: Re: A2MP3 auction to benefit @rsuenaga scholarship
- From: Michael J. Mahon <mjmahon@aol.com>
- Date: Wed, 21 Sep 2011 20:03:34 -0500
- Newsgroups: comp.sys.apple2
- References: <7756857.2102.1316615164458.JavaMail.geo-discussion-forums@yqcd38>
- User-agent: NewsTap/3.2 (iPhone/iPod Touch)
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Sean Fahey <a2fan@hotmail.com> wrote:
> James Littlejohn designed a switchable slot 7 card, the DoubleSeven - not
> Reactive. http://www.8bitsystem.com/slorble/?page_id=36
>
> But, it's not the ProSlot - the DS uses a manual switch (and you really
> should power the machine off before switching cards), whereas the ProSlot
> uses a softswitch and allegedly worked with the power on.
>
> I have the DoubleSeven and it's a great product but I've always wanted to
> learn more about how the ProSlot worked.
The easy way to hot-switch two cards in a slot is to keep them both powered
and just gate the enable signals.
-michael - NadaNet 3.1 and AppleCrate II: http://home.comcast.net/~mjmahon