# HG changeset patch
# User Paul Boddie <paul@boddie.org.uk>
# Date 1425767545 -3600
# Node ID 9cb1a32f298b347cdff8b05ed11a4913a6324714
# Parent  0d85537332551be14fb667a9275a800ff49e6213
Added Am29F010 CE# logic for the Advanced ROM Adaptor.

diff -r 0d8553733255 -r 9cb1a32f298b README.txt
--- a/README.txt	Fri Mar 06 01:02:18 2015 +0100
+++ b/README.txt	Sat Mar 07 23:32:25 2015 +0100
@@ -61,14 +61,26 @@
 low, an attempt to read from ROM #2 would be occurring, and thus A14 would be
 held high.
 
-ROM #1 CS#  ROM #2 CS#  Am29F010 A14
-----------  ----------  ------------
-0           0           Not defined
-0           1           0
-1           0           1
-1           1           Not defined
+Meanwhile, the CS# signal for the two ROM sockets would need to be combined to
+produce a resultant CE# signal for the Am29F010.
+
+ROM #1 CS#  ROM #2 CS#  Am29F010 A14    Am29F010 CE#
+----------  ----------  ------------    ------------
+0           0           Not defined     Not defined
+0           1           0               0
+1           0           1               0
+1           1           Not defined     1
 
-It might therefore be possible to connect A14 to ROM #1's CS# signal.
+It might therefore be possible to connect A14 to ROM #1's CS# signal. And the
+resultant CE# signal could be the product of an AND gate:
+
+Am29F010 CE# = ROM #1 CS# AND ROM #2 CS#
+
+ROM #1  ROM #2  74HC08  Am29F010
+------  ------  ------  --------
+CS#             1A      A14
+        CS#     1B
+                1Y      CE#
 
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