Changes
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.
The expansion was available directly from Vortex (germany) and also from [[Screens Microcomputers]] (uk).
Usable under [[BASIC]] and [[CP/M]]:
