Darkstar loading instructions:

These instructions are for use with the Classic99 emulator.
Download the File TF1.2.zip and extract in in the MODS subdirectory of Classic99.
Place the file DARKSTAR in the DSK1 subdirectory of Classic99.
Select the Cartridge menu, then User, then Open. Navigate to the MODS subdirectory and select the TURBOFORTHC file. This will load the Turbo Forth 1.2 cartridge.
Select Turbo Forth 1.2 from the TI startup screen.
Type EXACTLY as below including the spaces. Press ENTER at the end of each line:

S" DSK1.DARKSTAR" USE
40 BLOAD DROP
DARKSTAR

The game should launch from there.