Vortex CPM

Vortex implemented their own version of CP/M for the CPC and also provided patches for Amstrad's CP/M to use their memory expansion.

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 could use their RAM expansion to get 63KB TPA.

Vortex's implementation of CP/M on Floppy

To boot C/PM you need:

• a CPC464
• VDOS 1.0 on ROM and a Vortex disc interface.
• a 80 track double sided drive A.
• a Vortex 512KB RAM Expansion.