A 6502 Computer, With Acres Of Breadboard And Dozens Of Chips

Imagine you’re time-warped back to 1979 and tasked with constructing a personal computer. Could you do it? [RadicalBrad] thinks he can, and his 6502-based “Super VIC” build looks like it’s off to a great retrocomputing start.

Most emulations of old hardware these days go the FPGA route, and while we respect those projects immensely, there’s something to be said for applying a highly artificial constraint at the outset of a project. [RadicalBrad] chose to design like it’s 1979, and limited his ode to the machines of his youth to the 6502 CPU and logic and RAM chips available before 1980. The computer will support NTSC video output and 4-channels of 8-bit sound. No circuit boards will be used – everything is to be assembled on solderless breadboards. So far he has 48 (!) of them ganged together, which sounds like an enormous amount of space to work with, but he still found things crowded enough that some of the DIP bodies were trimmed a bit to fit more closely on the breadboards. The SRAM posed a problem, though, in that the 512K chips he wanted were not available in DIPs. To stay faithful to the constraints, he soldered the SOJ-packaged RAM chips into 40-PIN DIP headers – all 25 chips! We can’t recall a PC of the era sporting 12 megabytes of RAM, but no matter – it’s too cool not to love.

[RadicalBrad] has his work cut out for him, and this could take years to finish. We’re keen to follow his progress and can’t wait till it boots for the first time. Until it does, we’ll just gaze upon such discrete computing wonders as this almost-as-simple-as-possible computer, or even this delightfully noisy adder for a relay computer.

30 Years Later TED Finds His Voice: A Commodore Story Part I

MOS SID Chip
MOS SID Chip Sound Interface Device

In the before-time (I’m talking about the 1980’s here), when home computers were considered to be consumer items, there was the Commodore C64. The C64 derived its vast array of superpowers from two Integrated Circuits (IC) named VIC and SID standing for Video Interface Chip and Sound Interface Device. Chip names were part of our culture back them, from VIC up to Fat AGNES in the end.

We spoke about VIC and SID as if they were people or distant relatives, sometimes cantankerous or prone to sudden outburst, but there was always an underlying respect for the chips and the engineers who made them. VIC and SID together made one of the world’s best video and sound experiences; movement and noise, musical notes and aliens.

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