I followed the instructions here:http://thewanderingengineer.com/2013/05/05/software-serial-on-the-attiny85/
and IT WORKED !
See attached screenshot of my terminal program reading the tiny output to a TTL-RS232 adaptor module
(simple MAX232 circuit I got for $5 on eBay). I have an RS232 to USB cable from RadioShack plugged
into the adaptor module which uses a different comm port (in Device Manager) than my Arduino UNO
USB used to upload programs to the tiny85. tiny pin -3 (chip pin-2) is rx, and tiny pin-4 (chip pin-3)
is tx. I still need to test serial input to the tiny but at least I have debug serial out , thanks to you.
I'm on my way now...