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8086 uP Require

Oh, BARF! Gray is for political hacks... black and white is for engineering.

Good design does NOT rely on set-up-and-hold times as part of the system timing.

...Jim Thompson

--
|  James E.Thompson, P.E.                           |    mens     |
|  Analog Innovations, Inc.                         |     et      |
|  Analog/Mixed-Signal ASIC's and Discrete Systems  |    manus    |
|  Phoenix, Arizona            Voice:(480)460-2350  |             |
|  E-mail Address at Website     Fax:(480)460-2142  |  Brass Rat  |
|       http://www.analog-innovations.com           |    1962     |
             
        Global Warming is God's gift to the Blue States ;-)
Reply to
Jim Thompson
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Agreed. We're talking about designs > 20 years ago, made with limited resources. Unfortunately many such designs did not bite the bullet and add the extra fast buffer chips necessary for proper safe synchronous designs. I did many bullet-proof synchronous designs in the mid 70s. So I'd say, while there may not have been sufficient excuse for taking the cheap way out in the mid 80s, I know it was commonplace. If you look at Intel and other app notes of the day, you'll see it was common.

--
 Thanks,
    - Win
Reply to
Winfield Hill

If it doesn't, I wonder how an NEC V30 would fare ?

Graham

Reply to
Pooh Bear

I recall doing some work for a marine radar company that made its own

8086 based boards for anti-collision systems.

One in 10 or so simply never worked they said.

Graham

Reply to
Pooh Bear

Weren't the NEC chips upgrades for the 8088? I know the V20 was.

--
Service to my country? Been there, Done that, and I've got my DD214 to
prove it.
Member of DAV #85.

Michael A. Terrell
Central Florida
Reply to
Michael A. Terrell

As the V20 was an 8088 replacement, so the V30 was an 8086 replacement:

// Christian Brunschen

Reply to
Christian Brunschen

Thanks, I had never used the V30 and I couldn't remember the V30 specs.

--
Service to my country? Been there, Done that, and I've got my DD214 to
prove it.
Member of DAV #85.

Michael A. Terrell
Central Florida
Reply to
Michael A. Terrell

They were indeed. That means some timings are likely to be different but that might work in the OP's favour since we don't know the reason for his display issue.

Graham

Reply to
Pooh Bear

No, it means it's useless in an 8086 socket - they have different data busses. But I had thought that the V30 was just a hot V20, and the V40 was the 16-bit one, or am I thinking 286?

Thanks, Rich

Reply to
Rich Grise

The V30 is a drop-in replacement for an 8086. I fited one in my Amstrad PC of old. It does the sums faster !

Graham

Reply to
Pooh Bear

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