Difference between revisions of "Amiga memory map"
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| colspan="7" | 8520-A (access at odd-byte addresses only) | | colspan="7" | 8520-A (access at odd-byte addresses only) | ||
|- | |- | ||
| − | | C00000- | + | | C00000-C7FFFF |
| − | | | + | | 512KB |
| − | | | + | | |
| + | | Pseudo-fast RAM | ||
| + | | colspan="5" | | ||
| + | |- | ||
| + | | C80000-D7FFFF | ||
| + | | 1MB | ||
| + | | colspan="7" | Reserved | ||
|- | |- | ||
| D80000-DBFFFF | | D80000-DBFFFF | ||
| Line 93: | Line 99: | ||
| F00000-F7FFFF | | F00000-F7FFFF | ||
| 512KB | | 512KB | ||
| − | | colspan=" | + | | Reserved |
| + | | Extra ROM (CDTV) | ||
| + | | colspan="2" | Reserved | ||
| + | | Diagnostic ROM | ||
| + | | Flash ROM / Extra ROM (CD32) | ||
| + | | | ||
|- | |- | ||
| F80000-FBFFFF | | F80000-FBFFFF | ||
| 256KB | | 256KB | ||
| − | | colspan=" | + | | colspan="2" | Reserved |
| + | | colspan="5" | Lower 256KB of System ROM | ||
|- | |- | ||
| FC0000-FFFFFF | | FC0000-FFFFFF | ||
| 256KB | | 256KB | ||
| − | | colspan=" | + | | colspan="2" | System ROM |
| + | | colspan="5" | Upper 256KB of System ROM | ||
|- | |- | ||
! colspan="9" | 32-bit Addresses | ! colspan="9" | 32-bit Addresses | ||
Revision as of 13:32, 15 September 2016
Standard amount of memory in the Amiga
- Amiga 1000 - 256KB chip RAM
- Amiga 500 - 512KB chip RAM
- Amiga 500+ - 1MB chip RAM
- Amiga 2000 - 512KB chip RAM, later 1MB chip RAM
- Amiga 3000 - 1-2MB chip RAM, 1MB fast RAM
- Amiga 600 - 1MB chip RAM
- Amiga 1200 - 2MB chip RAM
- Amiga 4000 - 2MB chip RAM, 2-4MB fast RAM
Memory map
| Address Range | Size | Function | ||||||
|---|---|---|---|---|---|---|---|---|
| A1000 | A500 / 2000 | A500+ | A600 | A3000 | A1200 | A4000 | ||
| 000000-03FFFF | 256KB | First 256KB of chip RAM | ||||||
| 040000-07FFFF | 256KB | 256KB chip RAM expansion card | Second 256KB of chip RAM (to 512KB) | |||||
| 080000-0FFFFF | 512KB | Second 512KB of chip RAM (to 1MB) | ||||||
| 100000-1FFFFF | 1MB | Second 1MB of chip RAM (to 2MB) | ||||||
| 200000-9FFFFF | 8MB | Primary 8 MB Auto-config space (Fast RAM) | ||||||
| A00000-BEFFFF | 1984KB | Reserved | ||||||
| BFD000-BFDF00 | 3840 bytes | 8520-B (access at even-byte addresses only) | ||||||
| BFE001-BFEF01 | 3840 bytes | 8520-A (access at odd-byte addresses only) | ||||||
| C00000-C7FFFF | 512KB | Pseudo-fast RAM | ||||||
| C80000-D7FFFF | 1MB | Reserved | ||||||
| D80000-DBFFFF | 40KB | Reserved | ||||||
| DC0000-DCFFFF | 64KB | Real time clock | ||||||
| DD0000-DFEFFF | 188KB | Reserved | ||||||
| DFF000-DFFFFF | 4KB | Custom chip registers | ||||||
| E00000-E7FFFF | 512KB | Reserved | ||||||
| E80000-E8FFFF | 64KB | Auto-config space. Boards appear here before the system relocates them to their final address. | ||||||
| E90000-EFFFFF | 448KB | Secondary auto-config space (usually 64K I/O boards) | ||||||
| F00000-F7FFFF | 512KB | Reserved | Extra ROM (CDTV) | Reserved | Diagnostic ROM | Flash ROM / Extra ROM (CD32) | ||
| F80000-FBFFFF | 256KB | Reserved | Lower 256KB of System ROM | |||||
| FC0000-FFFFFF | 256KB | System ROM | Upper 256KB of System ROM | |||||
| 32-bit Addresses | ||||||||
| 01000000 - 03FFFFFF | 48MB | N/A | Reserved | |||||
Some special addresses: * 000000-000100 - MC680x0 Exception Vector Assignment table (if VBR=0) * 000004 - Exec base (pointer to exec.library jumptable)
Sources for this info
- Amiga Hardware Reference Manual (1986)
- M68000 Programmer's Reference Manual (1984,fourth edition)
- amiga-hardware.com (for standard amount of memory)
