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Chapter_9 - 8086/ Power supply Input characteristics Logic...

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    8086/8088 Hardware Specifications Power supply: +5V with tolerance of ±10%; 360mA. Input characteristics: Logic 0 – 0.8V maximum, ±10μA maximum; Logic 1 – 2.0V minimum, ±10μA maximum. Output characteristics: Logic 0 – 0.45V maximum, 2mA maximum; Logic 1 – 2.4V minimum, -400μA maximum.
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    Pinout Pins are divided into three separate buses: Address (output); Data (input/output); Control (input/output);
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    Pinout Address/Data bus: AD7-AD0 (8088) or AD15-AD0 (8086). These lines are multiplexed address and data. Address bus: A15-A8 (8088). These are address lines only. Address/Control (status) bus: A19/S6 – A16/S3. These lines are multiplexed address and status. S6 is always logic 0, S5 indicates condition of the IF flag bits, S4 and S3 indicate which segment is being accessed during the current bus cycle.
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    Pinout Control bus: RD’ When asserted it indicates a read operation is happening.
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