Category Archives: Programmable Logic

Sound, video, DMA; more bring up

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Construction of the MAXI09 is continuing. With each part soldered onto the board comes a limited amount of testing with the monitor. Enough to exercise the very basic level of functionality, nothing more. Proper testing, and actually making the part do cool things, will come later. The first part added was the OPL2: Since this was previously prototyped on breadboard… Read more »

MuDdy and DISCo progress, and system reset generation

I have finally solved the issue with holding multiple FPGA designs inside a single configuration flash. It seems there is a special tool just for the purpose of creating complex program files (.pof files). The details are buried in this document. So this is great news, though since I only have one PLCC84 adapter made up I won’t be able… Read more »

Breadboard power solution and the start of FPGA dev board version 2

When working with solderless breadboard, one of the concerns is how to power it. Ideally I would have a nice bench PSU but, being cheap, I makedo without one. In the past I have stumbled around with various solutions, including using the power pins on a USB serial breakout board, using an AVR programmer header just for the purpose of… Read more »

FPGA woes

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This blog post is a bit unusual because all I’m able to write about are problems. In short I made up my FLEX6000 dev board but could not get it to function. Here it is in all of its glory: As you can see, I didn’t bother to fully populate it. The route cause of the problem, I suspect, is… Read more »

FPGA preliminaries

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This last few months has been a bit “scrappy” on the projects front. I’ve not made as much progress as I’d hoped but have started down several different fronts and have done a fair amount of reading. To learn about implementing a DMA controller, I initially started working on a new 6809 computer core on breadboard. In the end I… Read more »