Chips › Processors › Motorola 68000 family › Motorola 68020
Motorola 68020
1984
Motorola's 1984 full 32-bit processor with an instruction cache, used in the Macintosh II and Amiga 1200.
Emulators
| Emulator | Type | License | Site |
|---|---|---|---|
| AmiKit | downloadable | Freeware | Website ↗ |
| Basilisk II | downloadable | GPL-2.0 | Website ↗ |
| Executor | downloadable | GPL-2.0 | Website ↗ |
| FS-UAE | downloadable | GPL-2.0 | Website ↗ |
| Infinite Mac | online | Apache-2.0 | Website ↗ |
| WinUAE | downloadable | GPL-2.0 | Website ↗ |
Machines
Operating systems
Reference & documentation
External technical references for programming Motorola 68020 and for writing emulators.
| Resource | Type | Notes |
|---|---|---|
| MC68020/EC020 Microprocessors User's Manual ↗ | Datasheet | Official manual: full electrical and cycle-timing specs |
| MC68020 32-Bit Microprocessor User's Manual (1984) ↗ | Datasheet | Original 1984 Motorola 68020 manual scan |
| M68000 Family Programmer's Reference Manual ↗ | Format | Instruction word encoding and extension-word formats |
| M68000 Family Programmer's Reference Manual ↗ | Instruction set | Official opcode encodings, addressing modes, every instruction |
| MC68020/EC020 Microprocessors User's Manual ↗ | Pinout | Signal descriptions and package pin assignments |
| MC68020/EC020 Microprocessors User's Manual ↗ | Programming | Programming model, registers, exception and stack frames |
| Optimizations for the 68020 ↗ | Programming | 68020 instruction cycle-count and optimization guidance |
| MC68881/MC68882 Floating-Point Coprocessor User's Manual ↗ | Programming | FPU coprocessor interface and instruction programming |
| MC68851 Paged Memory Management Unit User's Manual ↗ | Reference | 68851 paged MMU coprocessor reference manual |
| comp.sys.m68k Frequently Asked Questions ↗ | Reference | 68k family specs, tools, addressing modes overview |
| SingleStepTests m68000 (MAME-generated) ↗ | Test suite | TomHarte-style JSON tests from MAME microcoded core |
| SingleStepTests ProcessorTests (6502/65C02) ↗ | Test suite | Per-opcode JSON tests with cycle-level bus activity |