Important note about System Flag -34 by Tony Duell Flag -34 is mis-documented in the manual. Here is the correct definition: clear : send printer data to the I/R port in 12-bit HP printer format set : send printer data to the device specified by flag -33, in 8-bit (standard serial) format. Thus, if both flags -33 and -34 are set, the printer data is sent to the I/R port in a format similar to that used for the kermit transmissions (My I/R decoder can thus send that data to a PC). -- Tony Duell, Particle Physics, H.H.Wills Physics Labs, Bristol University, Tyndall Avenue, Bristol, England