The X-MASS is an ATA/IDE interface for the CPC made by ToTO.
The device comes with a 128MB Disk-On-Module IDE device. This is connected as master and by default the X-MASS only supports a single device.
It is possible to remove this and use with other compatible ATA devices with an adaptor provided they support 8-bit data transfer. (e.g. CompactFlash).
== Technical ==
The port range it supports is FD08-FD0F.
The device also has a Disk-On-Module IDE device connected. This is connected as master and by default the X-MASS only supports a single device. It should be possible to remove this and use other compatible ATA devices with an adaptor provided they support 8-bit data transfer. When the X-MASS is powered on the CPC is held in reset while the X-MASS communicates with the Disk-On-Module. If all is good the reset is released and the CPC starts up.
During this reset time the X-MASS sets the device into 8-bit PIO mode using SET FEATURES ATA command. The X-MASS device therefore requires "newer" IDE devices which support the CFA ATA mode because the 8-bit PIO is part of that command set.