Bonjour MonsieurBon 
First of all let me congratulate you for the amazing project you just accomplished. It's an amazing piece of work. My sincere thumbs-up for it
I am not acquainted with "peggy", nor did I have time to investigate, so I'd like you to answer some questions I have about your project:
- Refresh rate ?
- Is refresh row based or column based ?
- Power dissipation - what are you using to drive columns/rows ?
- Modulation: are outputs pure digital or [can be] modulated with PWM or [ch931][ch948] (sigma-delta) ?
- Have you thought about using a CPLD/FPGA as "graphic card" ?
Best,
Álvaro