Closed 286 Mainboard with AMD 286 CPU and 704 KB Ram

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csabanw

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I offer for sale the following half configuration:

286 Mainboard
AMD N80L286-16/S 16 MHz CPU
704 kB memory (640 KB base and 64 KB extended)

The components is as you can see on the pictures, it can take from the actual item. The battery is removed , i make a photo from the place of it.
The configuration is tested, working. The pictures is on my google drive: https://drive.google.com/drive/folders/1Adt0F9XXhQFaTTtXcBEZCnp-VyqzHTU4?usp=sharing

The price i ask is 30 EUR (was 35, 40, 45 EUR) + postage, i can send it to the EU. I accept paypal.

Thanks for watching !
 
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Judging from the photos, it's probably worth noting that it actually has 1024KB -installed- (the other 320KB is likely just reserved for shadow/caching), with 4 sockets free, most likely for a '9th bit' of parity for each 8 bit of RAM. (or in other words 4x 41256, or 4464 chips) (either that or so that you can add 4x 41256 (128k) to 512k (4x 44256) for a total of 640k system RAM, if you wanted...)

also, this appears to have 4 SIPP sockets, which are for all intents and purposes SIMMS with 'pins' soldered on to the 30 pads (in my experience), as a 16-bit system, 286s can support 16MB of total (conventional + extended) RAM, and will still run a few useful OSs (Windows 3.x, DOS 4/5/6 etc)

it will of course be worth getting an external battery for this (or knocking together a 4-pin (dupont) connector and a 3 or 4 AA/AAA battery holder)

also, 16mhz is about as fast as it got in the 286 'world' (I beleive a few non-Intel companies did a 20mhz, but by that time the 386 had taken over, and as far as I am aware, there weren't too many made)
 
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Judging from the photos, it's probably worth noting that it actually has 1024KB -installed- (the other 320KB is likely just reserved for shadow/caching), with 4 sockets free, most likely for a '9th bit' of parity for each 8 bit of RAM. (or in other words 4x 41256, or 4464 chips)

also, this appears to have 4 SIPP sockets, which are for all intents and purposes SIMMS with 'pins' soldered on to the 30 pads (in my experience), as a 16-bit system, 286s can support 16MB of total (conventional + extended) RAM, and will still run a few OSs (Windows 3.x, DOS 4/5/6 etc)

it will of course be worth getting an external battery for this (or knocking together a 4-pin (dupont) connector and a 3 or 4 AA/AAA battery holder)

also, 16mhz is about as fast as it got in the 286 'world' (I beleive a few non-Intel companies did a 20mhz, but by that time the 386 had taken over, and as far as I am away, there weren't too many made)


I had a 286 board with 386SX AMI BIOS (by factory) with 16MB Ram installed 4x4MB 30pin simms and a 25 MHZ 286 CPU paired with 287XL Cyrix.

As you said they released the 25MHZ too late and 386 already went retail.
 
Last edited:
Judging from the photos, it's probably worth noting that it actually has 1024KB -installed- (the other 320KB is likely just reserved for shadow/caching), with 4 sockets free, most likely for a '9th bit' of parity for each 8 bit of RAM. (or in other words 4x 41256, or 4464 chips)

also, this appears to have 4 SIPP sockets, which are for all intents and purposes SIMMS with 'pins' soldered on to the 30 pads (in my experience), as a 16-bit system, 286s can support 16MB of total (conventional + extended) RAM, and will still run a few OSs (Windows 3.x, DOS 4/5/6 etc)

oh yeah, I had to look it up, but the very last 286 that IBM themselves produced was a 25mhz, I had forgotten about that. AMD ended on the 20mhz as they had gone on to their Am386 as well.

it will of course be worth getting an external battery for this (or knocking together a 4-pin (dupont) connector and a 3 or 4 AA/AAA battery holder)

also, 16mhz is about as fast as it got in the 286 'world' (I beleive a few non-Intel companies did a 20mhz, but by that time the 386 had taken over, and as far as I am away, there weren't too many made)


I had a 286 board with 386SX AMI BIOS (by factory) with 16MB Ram installed 4x4MB 30pin simms and a 25 MHZ 286 CPU paired with 287XL Cyrix.

As you said they released the 25MHZ too late and 386 already went retail.

I had to look it up, as I had forgotten, but IBM themselves did a 25mhz. AMD ended theirs at 20mhz, as they moved on to the Am386, can't find too much on some of the other companies that may have done a 286 like Chips & Tech, I thought that Intersil had made one, but I might also be confusing some of it with 287 makers.
 
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