Simple SoC

Description

A very basic, custom SoC softcore

Primary git repo: on github

Specs/Design: on github as well

We'll merely keep a meetup log and notes here, important stuff will be stored in One Single Repo (tm), next to the code :)

Meetups

Upcoming

2013/11/06 - Differential debugging

• investigate program upload without reflash
• test suite?

Log

2013/10/30 - Corrupted Pixels

• Had no luck actually locating the vga corruption bug
• simulator results and simpler test cases seem to work fine
• implemented wait

2013/10/23 - We love glitches

• Fixed VGA, centered image, still outputs corrupted data though
• vram resized to 256x256x3 in order to fit

2013/10/16 - How about conditions?

• Implemented beq, bga, bgt, jr, draw, fixed write16, read16
• wires up vram (resized to 2bpp because it doesn't fit)
• added vga output, but it is glitched/buggy

2013/10/09 - Howdy Simulator, for real

• debug, debug, debug, and simulate
• Implemented more state logic
• cpu mostly works, needs some more opcodes!

2013/10/02 - Howdy Simulator

• Implemented ram
• Added delays for ram

2013/09/25 - Verilog at last

• Spec now has vsync
• Reviewed sdlcore code
• Hacked together some very basic Verilog

2013/09/18 - Let there be code

• Debugged & Finished sdlcore implementation

2013/09/11 - September reunion

• Discuss and improve specs a bit
• Update documentation and C# ref. implementation
• forked from Programmable Logic Lessons to Simple SoC

Resources

• The material from Programmable Logic Lessons
  • Direct links, slides, vga_out verilog example, a simple cpu in C
• Your favorite search engine