Tag Archive: FPGA

Oct 04

First Commercial Success

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After ordering the wrong buffer chip for my Logic Cube I started poking around and managed to get a commercial rom to run.  It seems my issues are a result of timing problems with my new memory mapping module.  The attempt shown below locked up at the title screen but I have since managed to …

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Sep 29

Back To Work

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It’s been a little while since I’ve posted any progress on any of my projects.  I’ve been recently employed as a full time design engineer and have finally transitioned back into a schedule that allows me to work on some of my own interests again.  I’ve started up working on my NES emulator and had …

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May 10

NES FPGA: First Run

I’ve managed to get the nestest rom to run on my emulator.  I’m still nowhere near complete but this is a good first step.  Video is working, at least without sprites.  Control input works, although there’s a bug floating around in there somewhere   I’m currently working on getting the APU ( Audio Processing Unit) up and …

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Apr 17

NES FPGA : Mini Breakthroughs

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I’ve made significant progress since my first stumbling block.  I’ve rewritten my 6502 core so that it is synthesizable and have successfully deployed it to my nanoboard.  I have been able to tweak the data bus such that I can communicate with the internal cartridge, my PPU, and the external SRAM available on the nanoboard.  This has …

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Mar 22

FPGA 6502 Emulator: First Life

First OPCODE

There’s an amazing project known as Visual 6502.  They have created a transistor level net-list of the 6502 processor which can in turn be converted into synthesizable VHDL.  As nice as this is, I’ve decided that would be far too easy and am going to go ahead and emulate the 6502 core before I fool around with a proper simulation.  I’ve …

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