Dumb question on RAM expansion

[Noster]

Hi,

if I remember right, the ram-expansions for the trapdoor-slot of the A500 that have more than 512KB have an Gary-adapter that wires a single line to a pin of Gary.
The Agnus supports 2MB of RAM (all of them ?), but the early ones support only 512 KB chip-ram and 1.5 MB slow-ram (CPU-only fast-mem, but refreshed by the slow Agnus so this kind of ram has no speed improvement to chip-ram).

Noster

[Noster]

Hi,

> But I never thought the OCS chipset could address more than 1MB of chipram.

Not Chip ram, 512 kB Chip ram and 1,5 MB slow mem. The old A2000's have 512 MB Chip and an additional RAM card in the MMU-slot with 0.5 upto 1.5 MB of slow mem. This memory is also refreshed by Agnus, even in the oldest A2000's.

Noster