Old 6809 Computer Lives Again On Breadboards
2 min read
Amongst old CPUs, the 6809 never acquired as significantly interest as some of its cousins. The Radio Shack CoCo applied it and so did a development post in Wi-fi Environment Magazine. Now [Dave] has reconstructed that pc on breadboards and it seems good. The files are on GitHub and there is even a series of video clips about the equipment. You can watch the first a single below.
You can even read through the authentic content in the January 1981 Wi-fi Earth where the board utilised a 6802. The enhance to a 6809 seems in the July 1981 issue. The journal promised you could make the technique for £100. Aside from the 6809 there ended up only a couple of chips. A Promenade, two RAM chips, A 6821 PIA, and a 74LS138 decoder for handle choice. An MC1413 transistor array also authorized for a 7-segment display screen and a keypad alongside with a 7442 BCD decoder.
Seemingly [Dave] experienced started off a comparable laptop again in the 80s, and built modifications to it to adapt to the Wi-fi World’s project memory map. It sounds like he didn’t complete it, but he discovered the outdated boards and made the decision to recreate it on a breadboard.
Like many computers of the day, the device experienced a cassette interface. We seriously like the aesthetic of the 7-segment LEDs and the in general glimpse of the build.
The 6809 did see use in some certain industrial and video clip sport programs. There was also a New Zealand academic laptop dependent on the 6809, along with a handful of other residence pcs like the SuperPET and the Dragon.
