• Intel 8086

    From Bob Eager@21:1/5 to All on Wed Oct 21 22:24:39 2015
    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).

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  • From JT@21:1/5 to All on Wed Oct 21 11:33:34 2015
    Intel 8086 microprocessor was released in 1978. What device used the 8086 before 8086 was chosen for IBM PC 5150 in 1981 ?

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  • From JT@21:1/5 to Bob Eager on Thu Oct 22 11:42:47 2015
    On Wednesday, October 21, 2015 at 6:24:41 PM UTC-4, Bob Eager wrote:
    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).

    You are right about 8088. I saw an AMD 8088 on the real IBM 5150 motherboard. what device used 8088 before IBM???

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  • From Bob Eager@21:1/5 to All on Thu Oct 22 19:52:23 2015
    On Thu, 22 Oct 2015 11:42:47 -0700, JT wrote:

    On Wednesday, October 21, 2015 at 6:24:41 PM UTC-4, Bob Eager wrote:
    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).

    You are right about 8088. I saw an AMD 8088 on the real IBM 5150
    motherboard. what device used 8088 before IBM???

    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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