RAM expansions card from [[Vortex Computersysteme|Vortex]], mounted between CPC464 mainboard and CPU/Gate Array. It won't fit on CPC664, CPC6128, or CPC+ boards. The card is not compatible with the standard [[dk'tronics]]-sytle [[Standard Memory Expansions]].
Sold in different sizes of RAM as '''SP 64''', '''SP 128''', '''SP 256''', '''SP 320''' and '''SP 512'''. Resulting in a maximum RAM size of 576K (64K internal, plus 512K external). The smaller SP64-SP320 versions can be upgraded to SP512 by mounting additional RAM chips in the spare sockets. There is also a cut-down version, '''SP 64/M''', which contains only 64K RAM, no BOS ROM, and which isn't upgradable.
Usable under [[BASIC]] and [[CP/M]]:
Image:Vortex_PCB_Top.jpg|Vortex Expansion (Top, scanned)
Image:Vortex_PCB_Bottom.jpg|Vortex Expansion (Bottom, scanned)
File:Vortex Memory Expansion Advert (CPC Schneider International, issue 8-1985, page 15).jpg|Advert (CPCI 8-1985)
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