rslr/amiga-bootcamp
1
0
Fork 0
mirror of https://github.com/alfishe/amiga-bootcamp.git synced 2026-06-13 00:26:28 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions

Restructure - dedicated for copper and blitter separate subfolders to have the room to expand

Browse source
This commit is contained in:
Ilia Sharin 2026-05-31 13:52:45 -04:00
parent 616add20cf
commit a0fc3e05db
25 changed files with 1578 additions and 43 deletions
Download patch file Download diff file Expand all files Collapse all files

4
17_demoscene/3d_rendering.md
View file

@ -857,8 +857,8 @@ A: A voxel (volume pixel) display renders 3D data as a grid of points. On the Am
### Related Knowledge Base Articles
- [Pixel Conversion](../08_graphics/pixel_conversion.md) — C2P algorithms (Kalms, Blitter, Akiko)
- [Blitter Programming](../08_graphics/blitter_programming.md) — Fill mode, line draw, minterms
- [Blitter](../08_graphics/blitter.md) — Blitter hardware architecture
- [Blitter Programming](../08_graphics/blitter/blitter_programming.md) — Fill mode, line draw, minterms
- [Blitter](../08_graphics/blitter/blitter.md) — Blitter hardware architecture
- [Bitmap](../08_graphics/bitmap.md) — Bitplane memory layout, interleaving
- [Copper Effects](copper_effects.md) — Copper-driven display effects
- [Timing Optimization](timing_optimization.md) — Cycle counting, Blitter-CPU interleaving

8
17_demoscene/README.md
View file

@ -121,10 +121,10 @@ The key insight of demoscene coding: **the Copper, Blitter, Sprites, and Audio a
### Related Knowledge Base Articles
- [Copper](../08_graphics/copper.md) — Copper coprocessor hardware: instruction format, UCopList
- [Copper Programming](../08_graphics/copper_programming.md) — Building copper lists, gradients, raster effects
- [Blitter](../08_graphics/blitter.md) — Blitter DMA engine: channels, minterms
- [Blitter Programming](../08_graphics/blitter_programming.md) — Cookie-cut masking, line draw, fill mode
- [Copper](../08_graphics/copper/copper.md) — Copper coprocessor hardware: instruction format, UCopList
- [Copper Programming](../08_graphics/copper/copper_programming.md) — Building copper lists, gradients, raster effects
- [Blitter](../08_graphics/blitter/blitter.md) — Blitter DMA engine: channels, minterms
- [Blitter Programming](../08_graphics/blitter/blitter_programming.md) — Cookie-cut masking, line draw, fill mode
- [Sprites](../08_graphics/sprites.md) — Hardware sprites: DMA, attached sprites, multiplexing
- [Pixel Conversion](../08_graphics/pixel_conversion.md) — Chunky↔Planar: Kalms, Copper Chunky, Akiko
- [Video Timing](../01_hardware/common/video_timing.md) — Scanline anatomy, beam counters, per-frame budgets

8
17_demoscene/copper_effects.md
View file

@ -6,7 +6,7 @@
The Copper is the single most important tool in the demoscene coder's arsenal. With only three instructions — `WAIT`, `MOVE`, and `SKIP` — it can repaint the entire screen 50 times per second, changing color registers, bitplane pointers, scroll offsets, and sprite positions at exact scanline boundaries. Every iconic Amiga demo effect, from the rainbow copper bars in [Red Sector's **Megademo**](https://www.pouet.net/prod.php?which=3119) (1989) to the sinus-scrolling message waves in [**Desert Dream**](https://www.pouet.net/prod.php?which=1483) (1993, [Demozoo](https://demozoo.org/productions/142/)), traces back to someone figuring out how to make the Copper do something Commodore's engineers never intended.
This article covers the specific techniques demoscene coders developed for the Copper: classic copper bars, raster splits for multi-resolution screens, gradient shading, sine-based color cycling, and advanced tricks like copper-generated chunky pixels and mid-frame copper list swaps. For the Copper's hardware architecture and basic programming model, see [Copper](../08_graphics/copper.md) and [Copper Programming](../08_graphics/copper_programming.md).
This article covers the specific techniques demoscene coders developed for the Copper: classic copper bars, raster splits for multi-resolution screens, gradient shading, sine-based color cycling, and advanced tricks like copper-generated chunky pixels and mid-frame copper list swaps. For the Copper's hardware architecture and basic programming model, see [Copper](../08_graphics/copper/copper.md) and [Copper Programming](../08_graphics/copper/copper_programming.md).
```mermaid
graph TB
@ -807,7 +807,7 @@ See [pixel_tricks.md](pixel_tricks.md) for the full technique.
A: Yes, with caveats. AGA adds an 8-bit horizontal position (vs OCS 7-bit), controlled by the `BPC` bit in `FMODE`. AGA also has 256-color registers (`COLOR00`–`COLOR255`) instead of 32, allowing much more complex copper effects. However, the higher bandwidth of AGA bitplane DMA leaves fewer slots for the Copper.
**Q: Can I use copper effects from AmigaOS?**
A: Yes, via `UCopList` — the user copper list attached to a `ViewPort`. Intuition merges your copper instructions with its own. See [Copper Programming](../08_graphics/copper_programming.md) for the OS-friendly approach. For full copper control (demos), you take over the hardware directly.
A: Yes, via `UCopList` — the user copper list attached to a `ViewPort`. Intuition merges your copper instructions with its own. See [Copper Programming](../08_graphics/copper/copper_programming.md) for the OS-friendly approach. For full copper control (demos), you take over the hardware directly.
**Q: What happens if the Copper runs past the end of a scanline before finishing?**
A: The Copper simply continues executing on the next scanline. There is no error or trap. The WAIT instruction's purpose is to synchronize — if you don't WAIT, the Copper runs as fast as DMA allows. Effects that don't need per-line synchronization can skip WAITs entirely.
@ -818,8 +818,8 @@ A: The Copper simply continues executing on the next scanline. There is no error
### Related Knowledge Base Articles
- [Copper](../08_graphics/copper.md) — Copper coprocessor hardware: instruction format, UCopList
- [Copper Programming](../08_graphics/copper_programming.md) — Building copper lists, gradients, raster effects
- [Copper](../08_graphics/copper/copper.md) — Copper coprocessor hardware: instruction format, UCopList
- [Copper Programming](../08_graphics/copper/copper_programming.md) — Building copper lists, gradients, raster effects
- [Pixel Conversion](../08_graphics/pixel_conversion.md) — Copper chunky technique, C2P algorithms
- [Sprites](../08_graphics/sprites.md) — Sprite multiplexing (Copper repositions sprites)
- [Video Timing](../01_hardware/common/video_timing.md) — Scanline anatomy, beam counters

2
17_demoscene/pixel_tricks.md
View file

@ -656,7 +656,7 @@ A: EHB is a 6-bitplane mode where the 32nd palette entry is automatically genera
- [Copper Effects](copper_effects.md) — Copper bars, gradients, raster splits
- [Display Modes](../08_graphics/display_modes.md) — ModeID, BPLCON0 settings
- [Video Timing](../01_hardware/common/video_timing.md) — Scanline structure, beam position
- [Blitter Programming](../08_graphics/blitter_programming.md) — Blitter fill for HAM rendering
- [Blitter Programming](../08_graphics/blitter/blitter_programming.md) — Blitter fill for HAM rendering
### External Resources

2
17_demoscene/sprite_techniques.md
View file

@ -567,7 +567,7 @@ A: `CLXCON` (`$DFF098`) configures which sprite and bitplane bits are included i
- [AGA Sprites](../01_hardware/aga_a1200_a4000/aga_sprites.md) — AGA sprite enhancements: 32/64px, FMODE, color banks
- [Copper Effects](copper_effects.md) — Copper-driven sprite repositioning
- [Pixel Tricks](pixel_tricks.md) — Chunky pixel techniques using sprites
- [Blitter Programming](../08_graphics/blitter_programming.md) — BOB rendering (sprite alternative)
- [Blitter Programming](../08_graphics/blitter/blitter_programming.md) — BOB rendering (sprite alternative)
- [Animation](../08_graphics/animation.md) — GEL system: VSprites (software sprites)
- [DMA Architecture](../01_hardware/common/dma_architecture.md) — DMA slot allocation

2
17_demoscene/timing_optimization.md
View file

@ -725,7 +725,7 @@ A: **Blitter-CPU interleaving**. On a stock A500, the Blitter and CPU share the
- [Bus Architecture](../01_hardware/common/bus_architecture.md) — CPU/DMA bus sharing, wait states
- [Cache Management](../15_fpu_mmu_cache/cache_management.md) — CACR, CacheClearU, coherency
- [68040/68060 Libraries](../15_fpu_mmu_cache/68040_68060_libraries.md) — Line-F trap handlers, FPU emulation
- [Blitter Programming](../08_graphics/blitter_programming.md) — Fill mode, line draw, Blitter timing
- [Blitter Programming](../08_graphics/blitter/blitter_programming.md) — Fill mode, line draw, Blitter timing
- [3D Rendering](3d_rendering.md) — Fixed-point math, C2P costs
- [Copper Effects](copper_effects.md) — Copper list timing, DMA budgets