This simple design could easily be expanded in a larger chip (like an FPGA) to use multiple image planes, each with independent scrolling. The project was challenging, but in the end it was easier than I expected. I started by laying out asynchronous logic in Logisim to see how feasible the idea would be, before transitioning to a fully synchronous design programmed in VHDL.

It uses nearly all available logic in the CPLD, mostly for the registers used for counting pixels per line and lines per frame. It still has some bugs in the CPU interface logic, but for a proof of concept I consider it a success. Scrolling registers allow the image to be scrolled up to seven pixels horizontally or vertically. It supports selection of a single tileset for the entire image or three separate tilesets, one for each horizontal third of the screen. It generates VGA 640x480 resolution video at 60Hz using 8x8px tiles at 4 bit per pixel color. Simply because I was told it couldn't be done - I built out a simple tile-based VGA video generator in a single 128 macrocell CPLD. Huge thanks to all of our project members on a job well done so far! The project isn’t even close to being finished yet! Stay tuned for more in the upcoming months! from Sega Dreamcast Info Preservation Games ( ) has generously donated a prototype of ChuChu Rocket! and Sega GT as well!

Unreleased localization builds such as Dinosaur Hunting: Ushinawareta Daichi. Prototypes of unreleased games such as The Vatz, Made Man, and Hail to the Chimp. Some Dreamcast highlights include - Debug enabled builds of Jet Grind Radio and Illbleed, a unreleased English localization of Shangai Dynasty, an early build of 4 Wheel Thunder called Offroad Thunder, an early prototype of Deep Fighter with preproduction FMV, and more! Xbox highlights include - prototypes of Jet Set Radio Future, Crazy Taxi 3, Toe Jam & Earl III, Gunvalkyrie, and more. Project Deluge - Sega Dreamcast (Matched List)ĭiscuss this release on our Discord server!Ĭontinuing with our efforts with Project Deluge, today we present over 349 Microsoft Xbox prototypes and 135 Sega Dreamcast prototypes! From unreleased games to early builds, this lot continues to be fruitful. Project Deluge - Microsoft Xbox (Matched List)

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