[[Category:DIY]][[Category:Cpctech.org]][[Category:Memory expansions]][[Category:Vortex Computersysteme]]
Below are installation notes for the [[Vortex Expansions RAM card]] from Kevin Thacker. Note: Further info (in german) can be found in the official [[Media:Vortex SP 512 kb RAM Expasion Manual.pdf|Vortex SP 512 kb RAM Expasion Manual]] (pdf).
SP512 RAM expansion
The SP512 is a 512K RAM expansion which came in versions for the CPC464 CPC 464 and the CPC 664 made by Vortex GmbH which is is and are fitted inside the CPC464CPC casing.
There are 3 connections to the main CPC464 P.C.B.
*Cost-down revision of the CPC464.
**Reason: The Gate-Array is of a different design and is soldered to the main P.C.B.
*CPC664 or CPC6128. **Reason: The Gate-Array and Z80 CPU are sited sit in positions which the SP512 can't connect to.
*464+ or 6128+.
**Reason: These two use a new design with an ASIC which is soldered to the main P.C.B. The SP512 can't connect to this.
[[Image:cpc464af.jpg]]
This image shows how the CPC 664 version is mounted inside the CPC casing:
[[Image:Vortex ram mounted in cpc664.png]]