yu@cbnewsh.att.com (meng-lin.mark.yu) (06/19/91)
Task: I have a truth table, with 0-set, 1-set, and dont cares. I'd like to use MIS/SIS to do logic minimization, and hopefully get a good multilevel implementation. Trouble: Contrary to what described in the documents, MIS/SIS doesn't take the don't cares (output) in BLIF format. They did take them in the "pla" format, yet I couldn't find a way/script that seems to use the dont cares. Question: I can't believe that I couldn't use dont cares in such a logic minimizer. What did I do wrong? How can I let the minimizer use the don't cares (any format)? Thanks in advance. -Mark Yu yu@vax135.att.com
ellen@opua.Berkeley.EDU (Ellen M. Sentovich) (06/23/91)
Which version of MIS are you using? External don't cares in the last release of MIS are specified as a separate network. It is described in the blif.tex document that is distributed with the release. So there is a way of specifying don't cares, but it is not the same as don't cares in the PLA format. - Ellen -- Ellen M. Sentovich Dept of EECS, Rm. 205 #117 UC Berkeley Berkeley, CA 94720 (415) 655-2039 ellen@ic.Berkeley.EDU