Browsing through the discussion at 6502.org 's forum can be tedious, and
Daryl doesn't read these newsgroups, so here is his original post on
6502.org:
"After several months and many more revisions, I've completed laying out the
traces for the converter. I still need to clean it up - straighten some
traces, add 45 deg bends on the corners, check spacing around all pads and
vias, etc.
I added to the schematic. There are two jumpers. J2 allows you to select the
gate for the 74x245 and J3 selects 2 inverters or 4 inverters as inputs to
the AND gate.
Check out the schematic, layout draft, and expressPCB files on my web site.
http://65c02.tripod.com/conv.html
Estimated cost for 10 boards would be $200. ($20 each)
Daryl