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Derby user guide Derby User Guide CGetting started After powering on the computer use the cursors and Enter to select BASIC Enter unless you want to start the Tape Loader The copyright message is displayed Press Enter again to start the editor There are a

Derby User Guide CGetting started After powering on the computer use the cursors and Enter to select BASIC Enter unless you want to start the Tape Loader The copyright message is displayed Press Enter again to start the editor There are a number of di ?erences from BASIC the UK version of BASIC and even the original Spanish version of BASIC on which this version is based For example there is no SPECTRUM command because you can select BASIC from the boot menu You should take time to familiarize yourself with the unique features of the fastest version of BASIC There are two di ?erences that are not immediately apparent The ?rst is that almost all of the bugs in BASIC and all the bugs in BASIC are ?xed The second is that variables are persistent that is they are not CLEARed when you RUN a program This is because it would be very annoying to lose all the work you had done in the full screen simple string editor before you had saved it Simple strings not DIMensioned are saved when you SAVE your program The other menu options have the following e ?ects ? Loader - Open the esxDOS NMI browser when using divIDE divMMC and so on When you autoload programs from the NMI browser they run using the menu ROM similar to USR mode If this causes compatibility problems try loading from BASIC or BASIC instead Loads the auto ?le on a TNFS ?le system when using Spectranet ? Tape Loader - Hold Enter when selecting BASIC to get this option You can use this after mounting a tape in the NMI browser to run programs that require a BASIC environment for example splATTR ? Diagnostics - Run the Spectrum test program RS test requires a loopback adapter ? BASIC - Selects ROM the original version of BASIC and lock paging Use this for programs that trigger paging for example Jet Pac or perform a ROM checksum for example Travel with Trashman ? TR-DOS - Enters the TR-DOS command line requires BetaDisk interface or esxDOS TR-DOS emulation Commands are typed out in full The RETURN command is ignored press the reset button to return to the boot menu Programs run using the menu ROM similar to USR mode If this causes compatibility problems try loading from BASIC or BASIC Cinstead You can enter the TR-DOS command line from BASIC by entering PRINT USR If you have a K ROM machine you should use ROM ROM Under esxDOS you will boot in USR mode You can lock paging from the Dr Slump NMI browser You can switch to BASIC with the command or OUT In BASIC you will have to enter symbols the same way you do in BASIC and some symbols may clash with the extended editing commands Note HiSoft BASIC will not work because it requires the UK Spectrum editor ROM to run However programs compiled with it will run as normal Using the editor