Spectrum ROM Cartridge This cartridge contains the 1982 48K Spectrum ROM, configured for use with your Timex/ Sinclair 2068. Using the Cartridge Enter OUT 244,3 and press ENTER. If it's been a while since you've used the magic Timex/Sinclair keyboard, here are the keystrokes: • Press CAPS SHIFT and SYMBL SHIFT to get the E cursor. • Press CAPS SHIFT and O for OUT. • Enter 244 • Press SYMBL SHIFT and N for the comma. • Enter 3. • Press ENTER. Your 2068 should reboot and you should see: © 1982 Sinclair Research Ltd. You can now use your computer as if it were a real ZX Spectrum. This ROM makes your 2068 compatible with almost all 48K Spectrum software. Why OUT 244,3? Timex Command Cartridges are special ROM images prefixed with some information to tell your computer what kind of ROM it is and how to run it. ROMs like Zebra's OS-64 extend the built-in operating system. Others contained BASIC programs moved to a ROM. The Spectrum ROM doesn't have the prefix, so your computer ignores it. OUT 244,3 tells your computer that the 16K ROM space should look at the DOCK (cartridge) instead of the built-in ROM. When you issue the command, your computer reboots from the cartridge ROM. Resources The following webpage has everything I've found about the 2068, including Spectrum ROM information. As I find more information, it'll go on this page: https://www.timexsinclair.com/ computers/timex-sinclair-2068/ Timex Sinclair 2068 Group Since you're a confirmed TS 2068 owner, you may want join the Timex Sinclair 2068 Group. It's both an email list and a web forum. You can find more information here: https://groups.io/g/TS2068 Enjoy and reach out if you run into difficulty! David Anderson ([email protected]) Check my website, timexsinclair.com, for more Timex/Sinclair information about your computer. timexsinclair.com.