Good morning!
For my own consideration, please:
Is it correct that:
1.) TBUF-elements are not available in SPARTAN3 (physically)?
2.) I cannot make use of TBUF-library elements, also Webpack ISE 6.x is not producing an error?
3.) I can use behavioural descriptions with 'Z'-strengths? The synthesis tool is transforming them to logic regardless if I give the option "-tristate2logic yes/no"?
4.) I can use external (I/O)-TBUFS.
Ok, well thank you for your good support at all!
Thomas.