17 Dec
2002
17 Dec
'02
4:28 p.m.
Here's one:
http://www.kim-1.com/usrman.htm#E
From: tlindner(a)ix.netcom.com (tim lindner)
Reply-To: cctalk(a)classiccmp.org
To: classiccmp(a)classiccmp.org (Classic Computers)
Subject: Computer Audio Tape Formats
Date: Tue, 17 Dec 2002 13:50:31 -0800
I am looking for information regarding how various computers wrote
information to audio tapes.
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17 Dec
17 Dec
5:21 p.m.
Here's one:
http://www.kim-1.com/usrman.htm#E
Ahh, this is really diffferent!
This uses:
'0 bit' - 18 square cycles at 3700 Hz.
6 square cycles at 2400 Hz.
'1 bit" - 9 square cycles at 3700 Hz.
12 square cycles at 2400 Hz.
Both are the same length (7.452 microseconds).
As you can probably tell, I am currently anaylizing this at a very low
level.
--
tim lindner tlindner(a)ix.netcom.com
8057
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