Rewrite in assembler

Patch by Enoch


git-svn-id: svn://svn.code.sf.net/p/amforth/code/trunk@1443 fd1c0b69-5d68-47f5-910c-86182ebb6ecd
1-wire customization needs only 2 numbers

A Port and a PIN.


git-svn-id: svn://svn.code.sf.net/p/amforth/code/trunk@1444 fd1c0b69-5d68-47f5-910c-86182ebb6ecd
Merge branch 'hq'
undebugged new isr tx
New usart tx isr seems to work
Integrate RTS controlled usart isr
Document the new RTS/CTS controlled USART ISR.