Worst design decisions?
Todd Vierling
tv at duh.org
Thu Sep 18 15:07:10 UTC 2003
On Thu, 18 Sep 2003 up at 3.am wrote:
: Without a question: PS/2 style keyboard and mouse connectors. Impossible
: to tell from each other,
And this part is somewhat funny, too, because the PS/2 connector layout is
capable of having both devices share the same bus (there's two unconnected
pins, which some laptops use to provide alternate CLK/DATA signals).
If PS/2 mice used the unconnected pins rather than the same CLK/DATA pins as
the keyboard, all machines could simply have two connectors using all six
pins and you'd be able to plug either device into either socket.
A real "bus" would have been better yet, but we're talking about a spec that
came from a company bent on continuing to use simple TTL-based clocked
communications with collision detection only available by extra bus lines
(read: "bus and tag" 8-).
--
-- Todd Vierling <tv at duh.org> <tv at pobox.com>
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