2 Nov
2010
2 Nov
'10
10:09 a.m.
On Mon, Nov 1, 2010 at 8:00 PM, Chuck Guzis <cclist at sydex.com> wrote:
On 1 Nov 2010 at 16:28, alan canning wrote:
I bet you enjoy changing the rules :)
Ok, but you didn't say >only< --- or no diodes ;)
I must admit I have not read thru all the posts
so if somebody else
suggested this my apologies. Why not a one chip solution; use a 74S188
and program whatever you want the character set to be (i.e. hook or no
hook on 6s, etc. )?
That's where we started. ?Tony wanted to see what the minimum in
combinatorial logic would be. ?To date, I've not seen a solution that
doesn't use decoders or demuxes, just AND OR and NOT elements.
Anyone care to give that a crack and see what the optimal case is
using SSI TTL--say, nothing more complex than a 7486?
I'll eliminate some of the grunt work for folks and offer the
following document, which contains all of the Karnaugh maps and a
simple logic diagram.
http://www.strivingafterwind.com/EE/EE112/ee112formal.pdf
I'd probably start by using a 7404 and distribute the binary input
and its complement... :)
oh gee, thanks :)
try this
http://tinyurl.com/2fjfnm5
excuse google for using a rather obtuse url for linking simple files
=Dan
--http://www.vintagecomputer.net/ragooman/