On Tue, 1 Feb 2000 18:36:08 -0600 Michael P Olson writes: > I was just looking at my old (1978) Motorola MC6809 > Instruction Set > card. It has both BRA (BRanch Always) and a SEX (Sign EXtend A into > B) > instructions. > > Of course, since BRA is basically a GOTO statement, good > structured code > would have to be written BRA-less.... > No wonder there were so few women interested in microcomputers back > then > :^) > BRA used relative addressing using one less byte that JMP and making the code relocatable. Though the BRA was only two bytes long (and JMP 3), the BRA took 3 cycles to execute (I guess one cycle was spent figuring out the relative address). Harold FCC Rules Online at http://hallikainen.com/FccRules Lighting control for theatre and television at http://www.dovesystems.com ________________________________________________________________ YOU'RE PAYING TOO MUCH FOR THE INTERNET! Juno now offers FREE Internet Access! Try it today - there's no risk! For your FREE software, visit: http://dl.www.juno.com/get/tagj.