Note that the 9400/10/20/30/50 and "A" versions of the LeCroy 9400 DSO's support four versions of the option key GAL. There are references to WP03 support in the complete LeCroy GAL file set but it is believed that the latest release of the firmware for the units only support WP01 and WP02. Note that the PCMCIA is a hardware option and must be enabled with the key GAL for DSO's that have this feature installed. 1. WP01 Only 2. WP01 with the front panel PCMCIA SRAM card slot 3. WP01 and WP02 4. WP01 and WP02 with the front panel PCMCIA SRAM Card Slot. WP02 requires additional memory to be added to sockets on the GPIB interface card. See the service manual for details. WP01 may require the additional SRAM as well but this has not been confirmed by the author. The filenames of the files are: 9400_WP01_NO_CARD.JED 9400_WP01_CARD.JED 9400_WP01_WP02_NO_CARD.JED 9400_WP01_WP02_CARD.JED NOTE THAT GAL's PROGRAMMED WITH THESE FILES WORK IN THE 9400 SERIES DSO's THE FILES SHOULD BE PROGRAMMED INTO A 16V8-15 GAL. Atmel or Lattice GALS are recommended. Your group moderator is working on a solution to provide pre-programmed GALS to group members that do not have access to a GAL programmer. Alternately you can do a Google search on the web for GALBLAST for a cheap DIY GAL programmer. One link is: http://www.armory.com/~rstevew/Public/Pgmrs/GAL/_ClikMe1st.htm One could also buy a EasyPro90 EPROM/GAL programmer or the G540 on E-Bay. The EasyPro90 is a better programmer with better software but it costs more than double the cost of a G540. For the record the ZIP file contains all of the GAL files for all possible options (whether they were supported or released or not). These files are in the original GAL format and must be loaded by programmer as JED files. Note that some programmers (like the Stager C540 for example) do not support the loading of the GAL format. So it is recommended that you use one of four of the .JED files listed above as all GAL programmers should be able to load that file correctly. Note also that some of the programmers may not calculate the JEDEC fuse file checksum correctly. If you open the JED file you will see near the end of the file text that says "CXXXX" where"C" indicates the checksum and XXXX indicates the checksum value.