C't 512 KB internal RAM expansion

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Internal 512K RAM expansion for CPC6128 from german magazine c't, issue 10/1987. The DIY project name is CPC 6512.

One half (256K) of the total (512K) expansion memory is said to be accessible as Video RAM (with normal expansions, only 64K are accessible as Video RAM). So, the c't expansion might be incompatible with Standard Memory Expansions, or it might be a backwards-compatible variant with additional features.

Technical

I/O Ports are unknown ...?

Scanned Article / Schematics

Offtopic

The CPC 6512 c't Memory Expansion is not to be confused with issues CPC 6512 and CPC 6513 of the more popular World War II Fanzine from Concord Publications Company.