[Coco] Floating bit banger input on CoCo 3
mmarlette at frontiernet.net
Wed Apr 7 15:18:52 EDT 2010
On my lab system setup at work.
No cable = even
Cable = odd
----- Original Message -----
From: "Darren A" <mechacoco at gmail.com>
To: "CoCoList for Color Computer Enthusiasts" <coco at maltedmedia.com>
Sent: Wednesday, April 7, 2010 12:57:13 PM
Subject: [Coco] Floating bit banger input on CoCo 3
Is it normal for the CoCo 3's bit banger input circuitry to indicate
SPACE when no cable is connected? I had always assumed that it would
indicate MARK just like a CoCo 1 or 2, but that doesn't appear to be
the case with my CoCo 3.
If anyone would like to try a test, doing a PRINT PEEK (65314) will
return an even number for SPACE or an odd number for MARK.
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