How many ports for pointing devices does a player have?
All Philips CD-i players provide at least one input port for pointing devices. Some players have an RS-232 port at the back that can also be used to connect a pointing device (CDI 910, CDI 205, early versions of CDI 210, early versions of CDI 220, among others). A few players provide two ports for input devices alongside this RS-232 port (CDI 740, CDI 615, CDI 660, CDI 670). All other players have either only one input port, or one input port and an RS-232 connector that can not be used for pointing devices. In this case, a port splitter should be used to connect two pointing devices to use for example in multi-player games (except the portable players CDI 310, CDI 350 and CDI 360). To make things even more complicated: this port splitter can not be used on players that already have to input ports for pointing devices. Refer to the colum I/O in the Comparison table of all Philips CD-i players on this site to see how pointing devices can be connected to a particular player. 4.9.2 What’s
