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Macintosh System 1
1984
The 1984 operating system that launched the original Macintosh, introducing the desktop metaphor, windows, icons and the mouse to the mass market.
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Reference & documentation
External technical references for programming Macintosh System 1 and for writing emulators.
| Resource | Type | Notes |
|---|---|---|
| MC68000 Semiconductor Technical Data (Datasheet) ↗ | Datasheet | Electrical characteristics, DC/AC bus timing parameters |
| Apple MFS on-disk format notes (CiderPress2) ↗ | Format | Byte-level Macintosh File System volume layout |
| Macintosh resource fork format (Kaitai Struct) ↗ | Format | Formal binary spec of resource fork structure |
| M68000 Family Programmer's Reference Manual ↗ | Instruction set | Full opcode encodings for every M68000 instruction |
| Inside Macintosh: Trap Manager ↗ | Interrupt list | A-line trap dispatch: OS and Toolbox traps |
| Guide to the Macintosh Family Hardware (2nd Ed.) ↗ | Memory map | Full 68000 address map: RAM, ROM, VIA, SCC, IWM |
| MC68000 Datasheet pin assignments ↗ | Pinout | 64-pin DIP signal names and pin assignments |
| Inside Macintosh, Volume I ↗ | Programming | Toolbox and OS programming reference for 68K Mac |
| Macintosh 128K ROM Image ↗ | ROMs | 64K 128K ROM dump, runs in Mini vMac |
| Inside Macintosh, Volume II (1984) ↗ | Reference | OS core: File/Memory/Device managers reference |
| Mini vMac Source (GitHub) ↗ | Source | Mac Plus emulator C source; hardware emulation reference |
| resource_dasm ↗ | Tool | Resource fork and 68k application disassembler |