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Outdated 6809 Pc Lives Once more On Breadboards

Outdated 6809 Pc Lives Once more On Breadboards

Posted on November 10, 2022

Amongst outdated CPUs, the 6809 by no means were given as a lot consideration as a few of its cousins. The Radio Shack CoCo used it and so did a building article in Wi-fi Global Mag. Now [Dave] has reconstructed that laptop on breadboards and it appears nice. The recordsdata are on GitHub and there’s even a chain of movies concerning the system. You’ll be able to watch the primary one under.

You’ll be able to even learn the unique articles within the January 1981 Wi-fi Global the place the board used a 6802. The improve to a 6809 seems within the July 1981 factor. The mag promised it is advisable construct the gadget for £100. But even so the 6809 there have been just a few chips. A PROM, two RAM chips, A 6821 PIA, and a 74LS138 decoder for cope with variety. An MC1413 transistor array additionally allowed for a 7-segment show and a keypad along side a 7442 BCD decoder.

It sounds as if [Dave] had began a equivalent laptop again within the 80s, and made adjustments to it to evolve to the Wi-fi Global’s venture reminiscence map. It seems like he didn’t end it, however he discovered the outdated forums and made up our minds to recreate it on a breadboard.

Like many computer systems of the day, the system had a cassette interface. We in reality like the classy of the 7-segment LEDs and the entire glance of the construct.

The 6809 did see use in some explicit commercial and online game packages. There was once additionally a New Zealand instructional laptop according to the 6809, along side a couple of different house computer systems just like the SuperPET and the Dragon.

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