Maximum RAM in an Amiga 2000??

[psxphill]

Hi,
 
I've read that the A2000 has a maximum capacity of 8MB of RAM without using a 3rd party accelerator card. Does this include chip ram?? meaning I could only have 6MB fast and 2MB chip.... or could I have 8MB of fast ram and 2 MB Chip ram...totalling 10MB?
 
Cheers
 
Ben

68000 based amigas can have:
 
2 meg chip (0x000000-0x1fffff)
8 meg fast (0x200000-0x9fffff)
1.5 meg slow (0xc00000-0xd7ffff)
 
Adding 1.5 meg of slow ram to an a2000 may be a pain.

[psxphill]

That 8MB is Fast/Other RAM, in addition to whatever Chip/Graphics RAM your system supports. If you have full ECS then yes you can have 10MB overall with a base 68000 CPU.

You'll need a megachip to get 2meg of chip ram. Just having an ECS agnus will give you 1meg.

[psxphill]

You guys just don't answer fully the question:
- Local FAST RAM on accelerators: Up to 128Mb, pending the model. Some very old accelerators put the memory addressing inside the Zorro2 space, limiting the total amount of FAST RAM you can have on a system.

This was omitted because the OP said without an accelerator.
 
In the old days you had to put fast ram within the first 16mb, or devices with dma would get upset. It was only later that commodore allowed you to allocate memory where the address would fit in 24bits.
 
Annoyingly with an accelerator with local ram in the zorro 3 space, your zorro 2 dma is going to have to use chip ram. Unless you also have some zorro 2 fast ram.