Instruments supported by V6.0 firmware, (C) 1985 Tektronix: 494A/P 492A/P 495/P 2755/P 2754/P Some experimentation with DIP switch settings may be necessary to enable support for your instrument. Be aware that DIP switches used in Tek instruments of this vintage are extremely unreliable -- I recommend replacing them with new DIP switches before doing any further service work on the affected assemblies. These files should be burned to 27256-3 or faster EPROMs. John Miles (jmiles@pop.net) 5-Jun-05