Re: 6702 chip

From: William Levak <wlevak_at_SDF.ORG>
Date: Sun, 27 May 2012 14:47:06 +0000 (UTC)
Message-ID: <Pine.NEB.4.64.1205271418160.23964@sdf.lonestar.org>
On Sat, 26 May 2012, Rhialto wrote:

I have run a series of tests entering two odd numbers with different 
intervals between then.  The first odd number is 41 because it turns on 
all the bits. The second is 255 because it affects all the bits.

The table below list the number of consecutive high bits / number of low 
bits.

  interval    bit 7  bit 6  bit 5  bit 4  bit 3  bit 2  bit 1
  (original)   2/2    5/5    3/3    1/1    8/8    7/7    3/3
      0       *2/0   *5/0    3/3   *2/0    8/8   *7/0   *3/0
      1        1/1    4/1    3/3    0/2*   8/8    6/1    2/1
      2        0/2*   3/2    3/3                  5/2    1/2
      3        1/1    2/3                         4/3    0/3*
      4       *2/0    1/4                         3/4    1/2
      5        1/0    0/5*                        2/5    2/1
      6                                           1/6   *3/0
      7                                           0/7*   2/1
      8                                           1/6    1/2

The numbers with the * are implied since all bits are the same.

Bits 3 and 5 do not change.  This is probably because I started with 41, 
which is necessary to turn them on.  It will probably take 3 odd numbers 
to cycle bits 3 and 5.

This sequence starts with the bits low and the turns them high.  I have 
not tested what happens when you turn a high bit low.



wlevak@sdf.lonestar.org
SDF Public Access UNIX System - http://sdf.lonestar.org

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Received on 2012-05-27 15:00:05

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