Atari 520 ST FM Computer 4MB memory AdSpeed ST Accelerator US version - Tested For Sale

Atari 520 ST FM Computer 4MB memory AdSpeed ST Accelerator US version - Tested
When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.


Buy Now

Atari 520 ST FM Computer 4MB memory AdSpeed ST Accelerator US version - Tested:
$335.50

Working Atari ST 520 STFM Computer with 4 MB memory and an AdSpeed ST accelerator chip. This thing is a piece of hacking Art (see pictures). Each memory chip has been replaced and hand wired to allow it to work on the ST. Bring the total memory from the normal 512KB up to 4 MB. A toggle switch in the upper right corner of the case switches to the accelerated mode. I have not been able to confirm it goes to accelerated mode as I don't have a way to test the actual speed.
This is a US version that uses 120v power. The Floppy disk has been cleaned and lubricated, but the disk eject spring is weak so the disk does not pop out of the drive as far as it should.
All keys on the keyboard are working. It passed the RAM, Keyboard, Video, and Sound test.
The power supply has been Recapped and has a new voltage regulator transistor.
The case states this is a model 520STFM. Atari 520ST with FM in the name comes with an internal (F) floppy drive (single sided) and a RF (M) modulator allowing it to be used with a TV. However there is no RF modulator inside so you will need an Atari video cable to hook it to a TV or monitor.
Case Condition: The case has a hole in one side and there are holes in the top grill were a fan was once mounted. The is also a repair an the left side, See Pictures
In addition to the Atari ST computeryou may also be interested in other items we sale for the Atari ST:
  • A new Optical Mouse with an adapter that allows it to work on an Atari ST computer.

  • A video converter that allows you to use an Atari ST with a TV or Monitor that has HDMI input. Gives a much better quality picture than the RF.

To find these items click on “SeeOther Items” in the box in the upper right of this listing. Ifyou purchase one or both of these items at the same time as thecomputer I will combine the shipping and refund the shipping. Inother word you only pay the shipping cost for the computer.




Buy Now

Documentation