* the floppy controller is polled for data transfer
* Similar disc format (CP/M based)
However, the Spectrum+3 uses a different DOS than the Amstrad CPC6128. This means that the functions for reading/writing files are different on the Spectrum compared to the CPC.
The Spectrum's DOS is more powerful than the CPC's. It can read CPC discs, Spectrum +3 and PCW discs easily. In order for the Amstrad to read Spectrum and PCW discs, it needs to have a special XDPB (Expanded Disc Parameter Block) configuration installed.
===Consequences of a Spectrum Port===