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The board could read and write data at up to 540 bytes /second. The "standard" Tarbell format however was 187 bytes/second. Nevertheless this was far better than the only other current non machine specific format at the time the "Byte/Lancaster" format which was only 30 bytes/second. The encoding method was a phase-encoded (exclusive-OR of clock and data), self-clocking system. The board would work with almost any decent commercial audio cassette. Though it was nicer to be able to control the tape in software with proper digital cassette recorders and reel to reel recorders. The board was flexible to any port address via an onboard dip switch. There were on the board extra status and control lines that could be utilized to control the cassette recorder (or indeed anything else).
Other Tarbell Electronics S-100 Boards
This page was last modified on 06/06/2015