== Vortex's patch for CP/M 2.2 to use Vortex RAM Expansion ==
Vortex provided a disc with a PATCH.COM on it which patched Amstrad's CP/M 2.2, which came with the CPC664 , so it that CPM could use their RAM expansion to get 63KB TPA.
== Vortex's implementation of CP/M on Floppy ==