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Author SHA1 Message Date
Ilia Sharin
d514ccc4e8 rename 15_cpu_and_mmu → 15_fpu_mmu_cache; elaborate why 68040/060 instructions were removed with pros/cons tradeoff table; move Software That Uses the MMU catalog before FPGA/Emulation 2026-04-25 17:29:22 -04:00
Ilia Sharin
a5b49d073f Peripherals and models description improved and expanded 2026-04-25 14:51:45 -04:00
Ilia Sharin
c4522ef2ed Add memory types article, expand blitter cookbook, update cross-references 
New articles:
- 01_hardware/common/memory_types.md: comprehensive Chip/Fast/Slow RAM reference
  with DMA accessibility matrix, per-model configurations (A500-A4000),
  accelerator memory expansion (classic + modern), adaptive software behavior,
  pitfalls with impact analysis, FPGA/emulation notes
- AGENTS.md: documentation standards and methodology guidelines

Blitter programming (08_graphics/blitter_programming.md):
- Rewrote minterm truth table with narrative explanation and worked  example
- Added 7 advanced use cases with assembly/C code: shifted BOB, hardware scroll,
  area fill polygon, interleaved bitplane BOBs, double-buffered game loop,
  GUI window drag, tile map renderer
- Added Good/Bad Patterns section with 5 named antipatterns
- Added Practical Limitations table (10 constraints with workarounds)
- Expanded Common Minterms table with Description and Real-World Use Case columns

Cross-reference updates:
- Root README: added memory types to coverage, quick start, section index
- 01_hardware/README: updated common/ folder description
- address_space.md: linked to memory_types.md and chip_ram_expansion.md
- memory_management.md (exec): linked to hardware memory types reference
- bitmap.md, sprites.md, animation.md, audio.md: linked to memory_types.md
  explaining DMA Chip RAM requirement for each subsystem
- chip_ram_expansion.md: linked to comprehensive memory types article
 2026-04-25 14:12:46 -04:00
Ilia Sharin
f61c26b542 Expand documentation suite: 30+ articles enriched with diagrams, code examples, and hardware details 
Graphics: text_fonts (bitmap layout, styles), sprites (DMA, multiplexing), gfx_base (chipset detection), rastport (draw modes, clipping), ham_ehb (mermaid fixes), display_modes (HAM palettes)

Devices: scsi (per-model interfaces, Gayle limits, CD-ROM, native vs vendor drivers), console (ANSI sequences, CON:/RAW:), parallel (CIA registers, pinout), timer (resource exhaustion), gameport (quadrature, XOR state)

Libraries: workbench (WBStartup, AppWindow/Icon/MenuItem), rexxsyslib (ARexx port hosting, command parsing), diskfont (font directory, colour fonts), keymap (rawkey codes, dead keys), locale (catalogue system, date formatting), layers (ClipRect, refresh types), utility (TagItem chains), icon (DiskObject, ToolTypes), iffparse (IFF structure, ByteRun1), expansion (Zorro AutoConfig)

Networking: tcp_ip_stacks (major rewrite - Amiga vs Unix architecture, SANA-II pipeline, PPP/SLIP dial-up, Ethernet cards, MiSTer), bsdsocket (pure API ref), sana2 (buffer hooks, driver requirements), protocols (all code examples). Deduplicated overlap between the three files.

Toolchain: debugging (Enforcer patterns, SnoopDOS, GDB remote, kprintf checklist), sasc (pragma encoding, __saveds idioms), stormc (NEW - StormC IDE, C++, PowerPC)

References: error_codes (DOS, Exec, trackdisk, Intuition error tables)
Driver development: rtg_driver (Native driver analysis, P96 tuning)

All 22 README indexes updated. Root README synced with stormc.md entry.
 2026-04-23 21:37:26 -04:00
Ilia Sharin
4593ff135a 03: new article — exe_crunchers.md (executable packers deep dive) 
New comprehensive article on Amiga executable crunchers covering:
- Architecture: how crunched files remain valid HUNK executables
- Major crunchers: PowerPacker, Imploder, Shrinkler, ByteKiller,
  Titanics, CrunchMania, PackFire, XPK framework
- PP20 format: efficiency table, decrunch info, decrunch colours
- Shrinkler internals: 1536-context adaptive probability model,
  range coder, parity context flag, stack-based context table,
  actual 68000 decompressor source from GitHub
- LZ77/LZSS vs context-modelling+range-coding algorithms
- Relocation handling: 3 strategies (compressed relocs, delta
  table, merged single-hunk)
- Memory layout diagrams: before/during/after decompression
- Detection: magic signatures table, fake header warning,
  Python scanner script
- Tools: xfdmaster modular architecture, Ancient C++ library,
  debugger-based extraction (last resort)
- FPGA/emulation impact: timing, self-modifying code, cache

Based on web research: verified PP20 format spec, Shrinkler
source (askeksa/Shrinkler), Ancient library (temisu/ancient),
xfdmaster slave module architecture.

Updated indexes: 03/README.md, root README.md
 2026-04-23 18:41:07 -04:00
Ilia Sharin
7df1f11f15 03/04: deep enrichment of loader/exec format and linking/libraries 
Sections 03 and 04 augmented to bootcamp quality with targeted
enrichment based on content analysis (not just file size).

03_loader_and_exec_format:
- overlay_system.md: full rewrite — tree architecture diagram,
  HUNK_OVERLAY binary format, overlay manager runtime internals,
  worked binary example, linker support, modern alternatives
- hunk_relocation.md: full rewrite — visual before/after diagram,
  patching algorithm with code, RELOC32SHORT and DREL32 formats,
  PC-relative impact comparison table, self-referencing relocs,
  error scenarios, Python reloc scanner tool

04_linking_and_libraries:
- library_structure.md: full rewrite — ASCII memory layout diagram,
  JMP table encoding (why 6 bytes), MakeLibrary internals with both
  function array formats, complete library creation example with
  .fd file, checksum verification, lifecycle state diagram
- shared_libraries_runtime.md: full rewrite — OpenLibrary 4-step
  resolution path, ramlib disk loader internals, disk search path,
  version negotiation table (v33-v47), CloseLibrary/Expunge deep
  dive, memory-low sweep, common pitfalls table
- register_conventions.md: full rewrite — FPU register map,
  inter-library A6 save/restore pattern, small-data model with
  __saveds keyword, varargs/TagItem pattern deep dive,
  stack-based wrapper explanation, disassembly identification

Updated indexes:
- 03_loader_and_exec_format/README.md
- 04_linking_and_libraries/README.md
- Root README.md (sections 03 and 04)
 2026-04-23 18:30:45 -04:00
Ilia Sharin
99a6d53f57 boot_sequence: enrich all articles + new kickstart_rom.md 
New: kickstart_rom.md (ROM structure, module inventory, tools, custom ROMs)
Enriched: cold_boot (diagnostics, LED codes, troubleshooting),
kickstart_init (ExecBase creation, ROM scan, 4-phase init),
dos_boot (strap, boot block, Startup-Sequence), early_startup (recovery)
Updated: 02_boot_sequence/README.md, root README.md
 2026-04-23 18:12:45 -04:00
Ilia Sharin
59929047d4 exec_os: enrich all stubs to bootcamp-quality reference articles 
Complete rewrite of 14 exec_os articles from stubs to comprehensive
deep-dive technical references with architecture diagrams, pitfalls,
and best practices.

New: multitasking.md (scheduler, IPC, memory safety, real-world scenarios)
Enriched: exec_base, tasks_processes, library_system, library_vectors,
interrupts, exceptions_traps, memory_management, message_ports, signals,
semaphores, io_requests, lists_nodes, resident_modules

Updated indexes: 06_exec_os/README.md, root README.md
 2026-04-23 17:55:31 -04:00
Ilia Sharin
551ebda2b1
Update README.md 2026-04-23 12:18:25 -04:00
Ilia Sharin
21751c0025 docs(amiga): complete AmigaOS 3.1/3.2 developer reference — 172 files across 17 sections 
Comprehensive technical documentation covering:
- Hardware: OCS/ECS/AGA custom chip registers, Copper & Blitter deep dives
- Boot sequence: cold boot through startup-sequence
- Binary format: HUNK executable spec, relocation, debug info
- Linking & ABI: .fd files, LVO tables, register calling conventions
- Exec kernel: tasks, interrupts, memory, signals, semaphores
- AmigaDOS: file I/O, FFS/OFS layout, CLI/Shell scripting
- Graphics: planar bitmaps, Copper programming, HAM/EHB modes
- Intuition: screens, windows, IDCMP, BOOPSI
- Devices: trackdisk, SCSI, serial, timer, audio, keyboard
- Libraries: utility, expansion, IFFParse, locale, ARexx
- Networking: bsdsocket API, SANA-II, TCP/IP stack comparison
- Toolchain: GCC, vasm/vlink, SAS/C, NDK, debugging
- Reverse engineering: IDA/Ghidra setup, compiler fingerprints, case studies
- CPU & MMU: 68040/060 emulation libs, PMMU, cache management
- Driver development: SANA-II, Picasso96/RTG, AHI audio

All files include breadcrumb navigation. No local paths or proprietary content.
 2026-04-23 12:17:35 -04:00