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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.
63 lines
1.6 KiB
Markdown
63 lines
1.6 KiB
Markdown
[← Home](../README.md) · [Toolchain](README.md)
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# SAS/C 6.x — Compiler Reference
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## Overview
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SAS/C (originally Lattice C) was the dominant commercial C compiler for AmigaOS. Version 6.58 is the final release. It produces optimised 68k code with full AmigaOS integration, including pragma-based system calls and SAS-specific debug formats.
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---
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## Key Features
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| Feature | Description |
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|---|---|
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| Register args | Automatic register parameter passing |
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| Pragmas | `#pragma libcall` for direct library LVO calls |
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| Small data | A4-relative addressing for globals |
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| Profiling | Built-in `sprof` profiler |
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| Debug format | SAS stabs (`=APS` tag in HUNK_DEBUG) |
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| Optimizer | Global optimizer (`lc -O`) with peephole |
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---
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## Pragma Format
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```c
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/* dos_pragmas.h — generated from FD files: */
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#pragma libcall DOSBase Open 1e 2102
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/* ^^ ^^ ^^^^
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name LVO reg-encoding
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reg-encoding: 2=D2, 1=D1, 0=result in D0, 2 args */
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#pragma libcall DOSBase Close 24 101
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#pragma libcall DOSBase Read 2a 32103
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```
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Register encoding: digits map to registers (1=D0, 2=D1, ... 9=A0, A=A1, etc.)
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---
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## Compilation
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```
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lc -v -O -b0 -j73 hello.c ; compile
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blink hello.o TO hello LIB lib:sc.lib lib:amiga.lib ; link
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```
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| Flag | Meaning |
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|---|---|
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| `-v` | Verbose |
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| `-O` | Optimise |
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| `-b0` | Small data model (A4-relative) |
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| `-b1` | Large data model |
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| `-j73` | Generate 68020/68881 code |
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| `-d0` | No debug info |
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| `-d2` | Full debug info |
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---
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## References
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- SAS/C 6.x User Manual
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- NDK39 pragma files: `NDK_3.9/Include/pragmas/`
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