Enabling/disabling an 8088

Discussion in 'Embedded Systems and Microcontrollers' started by david_mackay00, Mar 22, 2013.

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  1. david_mackay00

    Thread Starter New Member

    Mar 14, 2009
    I want to have two 8088s pigged-backed and connected together by their pins but with a physical switch that selects which one is enabled, and which is disabled.

    I think the easiest way to do this would by via HOLD, but I need some guidance on any timing logic required. I don't want any bus contention following power on reset before the HOLD is actioned.

    I know I will need some logic to hand ALE and INTA as these don't tri-state in hold.

    Does anyone have specific suggestions on how to do all this please?
  2. bertus


    Apr 5, 2008
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