The Timex/Sinclair 2068 ROM Disassembly

The Timex/Sinclair 2068 was the Timex Computer Corporation’s third and final home computer sold in the United States market. Based on the Sinclair ZX Spectrum, Timex added many new features to the TS 2068.

The TS 2068 included new BASIC commands and a dedicated sound chip, cartridge port, support for up to 16MB of RAM, disk drives, printers, and more. These impressive features resulted in a powerful home computer that was no longer compatible with the ZX Spectrum.

This disassembly shows how Timex programmers changed the ZX Spectrum source code to support the new features and planned expansions.

This book reveals the inner workings of the TS 2068 operating system. It is a valuable resource for the serious machine language programmer.