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thejayman77 ec82764bef Initial commit: retroDE_ps2 — first-of-its-kind PS2 GS FPGA core (DE25-Nano / Agilex 5)

RTL (GS rasterizer, EE core stub, platform bridge, LPDDR4B path), sim regression
(272 TBs), docs, and tooling. Copyrighted PS2 content (BIOS, game code, GS dumps,
and all dump-derived textures/traces) is excluded via .gitignore and stays local.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

2026-06-29 20:10:50 -04:00

cp437_8x8.mem

Initial commit: retroDE_ps2 — first-of-its-kind PS2 GS FPGA core (DE25-Nano / Agilex 5)

2026-06-29 20:10:50 -04:00

I2C_Controller.v

Initial commit: retroDE_ps2 — first-of-its-kind PS2 GS FPGA core (DE25-Nano / Agilex 5)

2026-06-29 20:10:50 -04:00

I2C_HDMI_Config.v

Initial commit: retroDE_ps2 — first-of-its-kind PS2 GS FPGA core (DE25-Nano / Agilex 5)

2026-06-29 20:10:50 -04:00

platform_video_stub.sv

Initial commit: retroDE_ps2 — first-of-its-kind PS2 GS FPGA core (DE25-Nano / Agilex 5)

2026-06-29 20:10:50 -04:00

ps2_hps_bridge_null.sv

Initial commit: retroDE_ps2 — first-of-its-kind PS2 GS FPGA core (DE25-Nano / Agilex 5)

2026-06-29 20:10:50 -04:00

ps2_hps_bridge.sv

Initial commit: retroDE_ps2 — first-of-its-kind PS2 GS FPGA core (DE25-Nano / Agilex 5)

2026-06-29 20:10:50 -04:00

README.md

Initial commit: retroDE_ps2 — first-of-its-kind PS2 GS FPGA core (DE25-Nano / Agilex 5)

2026-06-29 20:10:50 -04:00

tile_ram_cdc.sv

Initial commit: retroDE_ps2 — first-of-its-kind PS2 GS FPGA core (DE25-Nano / Agilex 5)

2026-06-29 20:10:50 -04:00

README.md

rtl/platform

retroDE-specific platform integration. Matches docs/contracts/platform.md.

Wave 1 contents

platform_video_stub.sv — free-running raster generator. Default VGA 640x480 timing (overridable per-testbench to tiny values for fast sim). Takes bg_{r,g,b} from gs_stub and flood-fills the active region. Emits one EV_MODE per completed frame so testbenches can count frames without sampling raw video.

Scope boundary

This directory owns:

clock/reset sequencing entry points,
retroDE-facing video and audio adaptation,
HPS bridge plumbing (future),
top-level wrappers not belonging inside PS2 subsystems.

It does not own GS/PCRTC semantics (that's rtl/gif_gs/), SPU2 audio synthesis (rtl/spu2/), or any PS2 register behavior.

Replacement path

platform_video_stub stays as the platform adaptation layer. What changes is the upstream pixel source: Wave 1 → flat BGCOLOR from gs_stub, later waves → fuller GS/PCRTC output including framebuffer scan-out.