#6522

[commodorez]

At VCF East XX, former Commodore engineer Bil Herd gave me a handful of old chips from his storage bins. These are mostly 6502 family parts, meaning I'll find uses for them in my various projects. Those two in the middle that say SAMPLE and PROTOTYPE are the coolest of the bunch, and I'm gonna put these to work. Thanks, Bil!

[every-tome]

[speculatrix]

Zolatron 64 roundup

Zolatron 64 roundup: the state of play with my #6502 #homebrew computer build

This is the 300th blog post on this site, and I thought it would be appropriate to mark the occasion with a summary of what’s happening with my Zolatron 64 6502-based homebrew computer project. You see, the thing is, I’m feel like I’m about to announce ‘mission accomplished’ for this project. And that’s not something I get to say very often. Not that I won’t be doing lots more things with it.…

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[5sospicturesque]

Clearing out my camera roll 6522/?

[everymobbu]

[speculatrix]

Zolatron 64: a bug hunter's diary

Zolatron 64: a bug hunter's diary. Learning lessons when hunting problems with my #6502 #homebrew computer

It’s always a good day when you get a package from the fab. There’s something simultaneously exciting and daunting about unwrapping a shiny new batch of PCBs. On the one hand, there are the possibilities promised by the new device. On the other, you’re wondering whether you made some kind of mistake in the design and if the thing will work. Short answer: no. My latest batch of boards from JLCPCB…

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[speculatrix]

Zolatron 64: Using the 6522 VIA's timers - part 1

Zolatron 64: Using the #6522 VIA's timers in my #6502 #homebrew computer - part 1

There’s no getting away from it. The 6522 Versatile Interface Adapter (VIA) is, well, versatile. Alongside giving you two 8-bit general purpose I/O ports – much like the GPIO pins on a Raspberry Pi, Arduino and the like – it also has a bunch of handy extra features. These include a shift register and control lines that you can employ to fire off interrupts. But here we’ll be dealing with the…

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[speculatrix]

Zolatron 64 - more boards, bodging and blinkenlights

Zolatron 64 - #6502 #homebrew computer with more boards, bodging and blinkenlights

Well the Zolatron 64 homebrew 6502 computer is getting spiffed up in all sorts of ways. So here’s a quick catch-up before the next big challenge. Backplane The original backplane has been working fine. But I decided to upgrade it anyway. The connectors for the boards were a little further apart than they needed to be. And the new backplane is a four-layer PCB, so the interior ground and power…

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