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Intel 8086

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JT

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Oct 21, 2015, 2:33:35 PM10/21/15
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Intel 8086 microprocessor was released in 1978. What device used the 8086 before 8086 was chosen for IBM PC 5150 in 1981 ?

Bob Eager

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Oct 21, 2015, 6:24:41 PM10/21/15
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On Wed, 21 Oct 2015 11:33:34 -0700, JT wrote:

> Intel 8086 microprocessor was released in 1978. What device used the
> 8086 before 8086 was chosen for IBM PC 5150 in 1981 ?

The 8086 was not used for the IBM PC. It used the 8088 (same programmer
architecture, but different bus width and pipeline size).

JT

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Oct 22, 2015, 2:42:48 PM10/22/15
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You are right about 8088. I saw an AMD 8088 on the real IBM 5150 motherboard. what device used 8088 before IBM???

Bob Eager

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Oct 22, 2015, 3:52:25 PM10/22/15
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I've had a look, and I don't know! It was an easy hardware upgrade from
the 8080/8085 as the bus interface was similar (and the instruction set
was designed to be very similar (well, a superset)),
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