thejayman77
ec82764bef
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>
46 lines
1.0 KiB
Markdown
46 lines
1.0 KiB
Markdown
# Peripheral Contract
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Status: `Draft`
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## Purpose
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Group the console-completeness devices that are neither CPU cores nor the main
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graphics/audio engines.
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## In scope
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- CDVD
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- SIO2
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- memory cards
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- controller-facing console semantics
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- DEV9
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- USB
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- FireWire
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## Owns
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- register-visible behavior for these devices,
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- media/card/controller presence semantics,
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- protocol translation where the retroDE platform provides host assistance.
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## Questions to lock
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- Which peripherals are required for the first three milestones?
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- Which peripherals will be HPS-assisted versus locally modeled?
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- Is controller input presented first through a simplified abstraction or
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through SIO2-faithful transactions?
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## Allowed early stubs
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- device-present/device-absent reporting only,
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- fixed media status responses,
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- controller event injection through simplified paths,
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- memory card placeholder presence with no persistence.
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## Likely implementation order
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1. SIO2/controller minimum
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2. memory card minimum
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3. CDVD minimum
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4. DEV9/USB/FireWire as later completeness work
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