Difference between revisions of "C't 512 KB internal RAM expansion"
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(prooven with the expansion of a friend in 1992) |
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Internal 512 KB RAM expansion for CPC6128 from german magazine '''c't, issue 10/1987'''. The DIY project name is '''CPC 6512'''. | Internal 512 KB 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 can be accessed as Video RAM (with normal expansions, only 64 KB are accessible as Video RAM). | + | One half (256K) of the total (512K) expansion memory can be accessed as Video RAM (with normal expansions, only 64 KB are accessible as Video RAM). The c't expansion is compatible with [[Standard Memory Expansions]], and provides the additional CRTC feature, but it misses 64 KB usually addressed via I/O ports &7FFC, &7FFD, &7FFE and &7FFF. |
== Technical == | == Technical == | ||
Revision as of 14:57, 10 March 2010
Internal 512 KB 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 can be accessed as Video RAM (with normal expansions, only 64 KB are accessible as Video RAM). The c't expansion is compatible with Standard Memory Expansions, and provides the additional CRTC feature, but it misses 64 KB usually addressed via I/O ports &7FFC, &7FFD, &7FFE and &7FFF.
Technical
I/O Ports are unknown ...?
Scanned Article / Schematics
c't, issue 10/1987
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.
CPC 6512
CPC 6513
