Amiga memory map

Standard amount of memory in the Amiga

• Amiga 1000 - 256 Kb chip RAM
• Amiga 500 - 512 Kb chip RAM
• Amiga 2000 - 512 Kb chip RAM, later 1 MB chip RAM

Memory map

* 000000-03FFFF - 256K bytes of chip RAM
* 040000-07FFFF - 256K bytes of chip RAM (Amiga 1000 option card)
* 080000-0FFFFF - 512K bytes of extended chip RAM (to 1 MB)
* 100000-1FFFFF - 1024K bytes of extended chip RAM (to 2 MB) (on models with ECS or AGA chipsets)
* 200000-9FFFFF - Primary 8 MB Auto-config space (Fast RAM)
* A00000-BEFFFF - Reserved
* BFD000-BFDF00 - 8520-B (access at even-byte addresses only)
* BFE001-BFEF01 - 8520-A (access at odd-byte addresses only)
* C00000-D7FFFF - Internal expansion memory (pseudo-fast, Slow RAM on Amiga 500)
* D80000-DBFFFF - Reserved
* DC0000-DCFFFF - Real time clock
* DD0000-DFEFFF - Reserved
* DFF000-DFFFFF - Custom chip registers
* E00000-E7FFFF - Reserved
* E80000-E8FFFF - Auto-config space. Boards appear here before the system relocates them to their final address.
* E90000-EFFFFF - Secondary auto-config space (usually 64K I/O boards)
* F00000-FBFFFF - 256K System ROM (Kickstart 2.0)
* FC0000-FFFFFF - 256K System ROM


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)