i don't need to read the on-line "bible" because i've the "bible" right here (the whole book).
i've read the architercture, the hardware description and the datasheets of my specific uC many times. i've also an example program.

the program looks someting like this

wait until TI = true.
after this the value of TI must be set to false in software.
and then the data that must be transmitted is written to SBUF.

in pascal it looks like this:
repeat until TI=true;
TI:=false;
SBUF:=data;

but the hardware desciption says that there's a TX clock. and i can't find something like a clock in the example program i've got.
but it's still confuzing to me.