Abstract
When microprocessors first appeared there was no general agreement among manufacturers about power supplies, logic levels, or the number and functions of the control signals. Later, with the adoption of n-channel devices it became possible to use the same +5 V power supply as had been standardised for TTL packages. The industry-wide standards for TTL and CMOS logic were extended to peripheral computer packages such as RAM, ROM and EPROM devices, but not to the central microprocessor package itself.
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© 1983 J. C. Cluley
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Cluley, J.C. (1983). Microcomputer Buses. In: Interfacing to Microprocessors. Macmillan Computer Science Series. Palgrave, London. https://doi.org/10.1007/978-1-349-06497-7_7
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DOI: https://doi.org/10.1007/978-1-349-06497-7_7
Publisher Name: Palgrave, London
Print ISBN: 978-0-333-34061-5
Online ISBN: 978-1-349-06497-7
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