All ? I had some time today to work on the second serial port for the H11 I received two weeks ago. I built the second cable for use with the TU58 emulator so I could load tapes into the machine. I loaded up the bootstrap using PDP11GUI, mounted the XXDPD2D tape and hit ?001000G? and it worked! Yea! Next up, locating other bootable TU58 tapes and seeing if those work. Rich -- Rich Cini Collector of Classic Computers Build Master and lead engineer, Altair32 Emulator http://www.classiccmp.org/cini http://www.classiccmp.org/altair32