The Telmac 1800 was an early microcomputer delivered in kit form. It was introduced in 1977 by Telercas, the Finnish importer of RCA microchips. Most of the 2,000 kits manufactured were bought by electronics enthusiasts in Finland and Sweden.

An expansion board, OSCOM, later became available, and included an alphanumeric video display, and up to 12 kB of memory. A 4 kB Tiny BASIC could be run on this configuration.

Major features

• RCA 1802 (COSMAC) microprocessor CPU
• cassette tape interface
• 2 KB RAM, expandable to 4 KB
• 64×32 pixels display resolution
• able to run a CHIP-8 interpreter