Posts: 3,283
Threads: 104
Joined: Jul 2005
No, you can only do this with the 34S firmware in place, not the original from HP.
There are provisions for supporting the serial I/O port in the firmware but this is not documented for the general user. It's more of a testing environment for HP. I'm pretty sure you cannot get to the programs or registers from the outside this way.
Once you press the Erase button on the cable the firmware is toast. Sam-Ba.exe has the nasty habit of clearing the RAM, too, so all your data is lost if you use this button.
Edited: 1 Oct 2011, 4:45 p.m.