XilVGA

I'm making a VGA interface that can be controlled by an SPI protocol based on a Xilinx FPGA.

• Introduction
• Schematic
• PCB design
• Prototype
• Initial tests
• Reading the memory
• Writing to the memory
• Instruction set
• Making it useful
• Accelerating the write mechanism (part 1)
• Accelerating the write mechanism (part 2)
• Converting to a coordinate system
• Drawing circles
• Preparing for fonts
• Fonts

Code

I've put a bit of code in some of the sections, but larger bits are presented here:

• Bresenham Line algorithm (PicoBlaze)
• Bresenham Circle algorithm (PicoBlaze)