Kansas City standard

Developed in 1975, it uses asynchronous serial data encoded using frequency shift keying such that a '0' bit is represented as 4 cycles of a 1200 Hz sine wave[?], and a '1' bit as 8 cycles of 2400 Hz. This gives a data rate of 300 bits per second.

Computers using the Kansas City standard included:

• Several S-100 based systems, such as MITS Altair 8800
• PT[?] SOL-20
• Ohio Scientific[?] C1P/Superboard II
• Compukit[?] UK101
• Acorn Atom
• Nascom (which also supported a 1200 bps variant)
• Motorola MEK D1 6800 microcomputer board
• SWTPC 6800 based computers

External links

• Sound sample (http://www.swtpc.com/mholley/AC30/memcon1.wav)
• SWTPC AC-30 cassette interface (http://www.swtpc.com/mholley/AC30/AC30_Index.htm)