This article relies largely or entirely on a single source. (June 2016)
The Lambda 8300 was a Sinclair ZX81 clone from Lambda Electronics Limited of Hong Kong. It was not an exact clone, as it had a modified ZX81 ROM, but could be fitted with a ZX81 compatible ROM. It came with 2K RAM (expandable to 16 or 32 K), and a sound and joystick port. Specifically, it used a Z80A microprocessor at 3.25 MHz. It was identical to the DEF 3000, PC 2000, Marathon 32K, IQ 8300, PC 8300, Power 3000, Unisonic 8300, Futura 8300, Basic 2000 and Basic 3000.
- Bradbeer, Robin (March 1983). "Timex upgrades Spectrum". Sinclair User. pp. 83–84. Retrieved 28 January 2015.