Difference between revisions of "Amiga memory map"
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Revision as of 11:29, 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 |
---|---|---|
000000-03FFFF | 256KB | 256K bytes of chip RAM |
040000-07FFFF | 256KB | 256K bytes of chip RAM (Amiga 1000 option card) |
080000-0FFFFF | 512KB | 512K bytes of extended chip RAM (to 1 MB) |
100000-1FFFFF | 1024KB | 1024K bytes of extended chip RAM (to 2 MB) (on models with ECS or AGA chipsets) |
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-D7FFFF | 1536KB | Internal expansion memory (pseudo-fast, Slow RAM on Amiga 500) |
D80000-DBFFFF | 40KB | Reserved |
DC0000-DCFFFF | 64KB | Real time clock |
DD0000-DFEFFF | 188KB | Reserved |
DFF000-DFFFFF | 4096 bytes | 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 / diagnostic ROM |
F80000-FBFFFF | 256KB | Reserved (1.x), lower half of System ROM (2.x, 3.x) |
FC0000-FFFFFF | 256KB | 256K System ROM (1.x), upper half of System ROM (2.x, 3.x) |
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)