COMPAQ DeskPro 386 This "Visualizer" configuration is running the "uncompiled" version of PCx86, so that BackTrack information is available to the PCjs Debugger. As a result, the machine runs much slower. To reduce DEBUG or BACKTRACK overhead, you can add debug=false or backtrack=false to an uncompiled machine's URL. Since DEBUG support is automatically enabled in uncompiled code, you get automatic instruction history buffering (up to 100,000 instructions), which can then be dumped with the PCjs Debugger's "dh" command. Instruction history is supported in the compiled version as well, but only up to 1,000 instructions and only if one or more breakpoints are set. COMPAQ DeskPro 386, 2Mb RAM, COMPAQ VGA, 47Mb Hard Disk (Unformatted)