8OD – Processor selection

I’ve acquired quite a collection of 8086 processors throughout this project, and I’m not feeling too bad about it either, because I’ve had every single one of them running.

Sorted by clock frequency, here’s what I’ve tested so far.

5MHz

C8086 (1978)

 

Intel C8086

An expensive collectors item. I had to take a few courage pills before powering 8OD up with this fella plugged in. It works perfectly.

D8086 (1978)

Intel D8086

 

The first ceramic Intel 8086 produced in large quantities

USSR K1810VM86 (1990)

K1810BM86 K1810VM86

 

I’ve got a more detailed page about these here.

8MHz

MBL8086-2

Fujitsu MBL8086-2

By Fujitsu. Mine’s not in great nick but it is the best looking 8086 compatible in my opinion.

CP80C86-2Z (RoHS)

Intersil CP8086-2Z

By Intersil (formerly Harris Semiconductor). This is a very special variant of the 8086, because it is the only one that (as of 2015) is still in production.

This is an 80C86 which is a CMOS part, and runs significantly cooler (practically room temperature) than the original NMOS parts, but no faster, sadly.

Siemens 8086-2C

Siemens SAB8086-2C

Probably one of the most unexciting of all of these but being German, it is engineered to an overkill level of perfection and quality, outshining Intel’s own, and will probably outlive and outlast every other 8086 in existence.

P8086-2

Intel P8086-2

A plastic 8086 by Intel. I suspect this was made in large numbers.

10MHz

Intel D8086-1

Intel D8086-1

Intel branded, and in a Ceramic package.

AMD D8086-1

AMD D8086-1

I used to be an AMD fanboy a number of years ago so I had to have this one. These work fine but run the hottest of all the 8086’s I’ve tried.

This was the processor I used to verify 8OD.0 (the first prototype).

Unknown plastic 8086-1

Unknown 8086-1

 

This is a bit of a funny one. I was jipped by an eBay seller with this, but have kept it because it’s rather interesting. It’s marked as “D8086-1” but is made of plastic? ‘D’ is meant to mean ceramic by Intel nomenclature.

I also can’t help but notice that the font isn’t consistent with anything Intel produces either. It does run at 10MHz as advertised.

It’s in impeccable condition, and has a fairly cheap feeling package. It almost appears to be some kind of modern day reproduction, but uh… who would bother doing that?

A contemporary knock off perhaps? Whatever it is, I’ve not found a single picture or mention of another.

16 MHz

NEC V20 V30

NEC V30

With the pimped up V20 a fat lot of good in 8OD, I was rather lucky that a less known variant of it: The V30, is compatible.

V30 is the only one here which is technically is not an 8086, but a compatible. Internally it is very different.

8OD is not able to unlock the full awesome potential of its 16 MHz maximum clock at present. This will eventually be done.

2 thoughts on “8OD – Processor selection”

  1. The V40 (or V30) has a “cpm mode” and in this mode can execute 8080 code, for a more “retro”-duino.
    It can ever return from this mode, or call rutines in 8086 code from “cpm mode”.

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