1 Gig Ram in a A3000?

[Zac67]

1 GB is the largest memory size a single Zorro III card can support. Of course you could add multiple such - theoretical - cards to get to the physical maximum of 4 GB (AmigaOS could only use close to 2 GB of it).

[Zac67]

alexh wrote:
1 GB is the entire Zorro III space isnt it?

Hmm - good question. 1 GB definitely is the largest board size (er_Type=1110x110, er_Flags=1x11xxxx), possibly it's all there is.

The A3000's service manual says:

$08000000-$0FFFFFFF 32 bit ram expansion space. This grows up from $08000000.

This seems to be the 128 MB 'autoconfigured' on a CPU card.

$10000000-$EFFFFFFF 32 bit 'other' expansion space.

I guess that's Z III autoconfig space - 3.5 GB.

No idea whether it's really implemented that way though - would be a fun project to find out.  ;-)

My Merlin gfx card lives at $40000000 (A3000), so possibly the lower 1 GB is reserved for non Z3 stuff.