pete@octopus.UUCP (Pete Holzmann) (05/17/88)
[Note: I've directed followups to comp.periphs, although I don't personally
read that group]
You asked for it; I happened to find a copy in one of my magazines (Fall
1986 Computer Technology Review)... so here it is: the RLL code!
I think you'll agree that it *is* a variable length code, with constant
encoding density. It is kind of fun to play with it and verify that it
really is a 2,7 RLL code. It isn't at all obvious how to start with "I
want a 2,7 RLL code" and end up with this chart:
Data Code
1 00
01 0001
10 0100
11 1000
000 100100
001 001000
010 000100
0110 00100100
0011 00001000
Have fun!
Pete
P.S.: People have requested the ERLL and ARLL codes. I don't have them handy.
I'm not sure I have a recent enough printed reference. I know where
to go (actually, who to talk to) to get the chart; but if somebody
on the net has the codes handy, maybe they can pipe up! I can't be
the only one with access to this stuff!
--
OOO __| ___ Peter Holzmann, Octopus Enterprises
OOOOOOO___/ _______ USPS: 19611 La Mar Court, Cupertino, CA 95014
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