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New file: 08_graphics/copper/copper_reference.md - Full instruction set reference with opcode encoding table - Bit-level encoding for MOVE, WAIT, SKIP (7-bit masks) - Beam position encoding: V counter (8-bit), H counter (7-bit) - Copper control registers (COP1LC, COP2LC, COPJMP, COPCON, DMACON) - Copper list structure, dual lists, SKIP-based double buffering - DMA timing budget calculations per scanline - Register reference for all copper-writable targets - OCS/ECS/AGA differences (AGA 24-bit color via BPLCON3 LOCT) - Programming models: bare metal, OS-friendly UCopList, self-modifying - Common patterns: rainbow, split screen, status bar, sprite mux - Debugging: 8 common pitfalls with symptoms and fixes - Mermaid fetch-execute cycle diagram Updated files: - 08_graphics/README.md: add copper_reference.md to index - 08_graphics/copper/copper.md: cross-reference link, fix MOVE/WAIT encoding, fix UCopList CMOVE syntax - 08_graphics/copper/copper_programming.md: cross-reference link, fix horizontal resolution (2 color clocks, not 4)
26 lines
2.9 KiB
Markdown
26 lines
2.9 KiB
Markdown
[← Home](../README.md)
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# Graphics Subsystem — Overview
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The Amiga graphics system is built on custom DMA-driven hardware (Agnus/Alice + Denise/Lisa) managed through `graphics.library`. It supports planar bitmaps, hardware sprites, a Copper display coprocessor, and a Blitter for fast 2D operations. Three chipset generations (OCS → ECS → AGA) expanded resolution, color depth, and bandwidth.
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## Section Index
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| File | Description |
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|---|---|
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| [gfx_base.md](gfx_base.md) | GfxBase structure, chipset detection (OCS/ECS/AGA), PAL/NTSC, display pipeline (MakeVPort/MrgCop/LoadView), blitter queue |
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| [bitmap.md](bitmap.md) | BitMap structure, planar layout, allocation |
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| [display_modes.md](display_modes.md) | Full chipset comparison, ModeID selection flowchart, CRT vs flat-panel, interlace/progressive tradeoffs, named antipatterns, FPGA/MiSTer impact, historical context, modern analogies, FAQ |
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| [ham_ehb_modes.md](ham_ehb_modes.md) | HAM6/HAM8 encoding pipeline, EHB half-brite, fringing, palette programming, FPGA decoder logic |
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| [copper.md](copper/copper.md) | Copper coprocessor, instruction format, UCopList |
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| [copper_programming.md](copper/copper_programming.md) | Copper deep dive: architecture, copper list construction, gradient and raster effects |
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| [copper_reference.md](copper/copper_reference.md) | Copper ISA complete reference: full encoding, control registers, timing, register map, debugging |
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| [blitter.md](blitter/blitter.md) | Blitter DMA engine, minterms, BltBitMap |
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| [blitter_programming.md](blitter/blitter_programming.md) | Blitter deep dive: minterms, cookie-cut masking, line draw, fill mode |
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| [sprites.md](sprites.md) | Hardware sprites: DMA engine, data format, attached 15-color sprites, multiplexing, AGA enhancements, priority control |
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| [rastport.md](rastport.md) | RastPort drawing context: draw modes, patterns, layer clipping, text pipeline, blitter minterms |
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| [views.md](views.md) | View + ViewPort pipeline: 3-stage Mermaid diagram, ViewPort chaining (split screens), ColorMap/LoadRGB4, named antipatterns, Copper vs Views decision flowchart, modern GPU analogies |
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| [text_fonts.md](text_fonts.md) | TextFont bitmap layout, baseline rendering, algorithmic styles, AvailFonts, ColorTextFont, Compugraphic outlines, font scaling, 3 cookbooks, 4 antipatterns, 6 FAQ |
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| [pixel_conversion.md](pixel_conversion.md) | Chunky ↔ Planar conversion deep dive: naive, merge/butterfly (Kalms), Copper Chunky, Akiko hardware, Blitter-assisted, RTG bypass, SoA/AoS theory, GPU swizzle modern parallels |
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| [animation.md](animation.md) | GEL system deep dive: BOBs, VSprites, AnimObs, hardware foundation (Blitter/Copper/Sprite interaction), collision detection, double buffering, performance tuning |
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| [rtg_programming.md](rtg_programming.md) | Retargetable Graphics (CyberGraphX/Picasso96): LockBitMapTags VRAM access, pixel formats, double buffering, bus bandwidth, 16-card catalog, 5 antipatterns, dirty-rect optimization, modern analogies, 6 FAQ |
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