PS2 YaBasic 1.5
However YaBasic is free, a USB Keyboard costs next to nothing, and if you have an interest in programming, or fancy having a go at it without the outlay of an expensive PC, then it is certainly worth having a go at. Who knows, you might just create the next Colin McRae Rally, which you can share with all of us. :D
There is also a developers forum for YaBasic at SourceForge .net Download and Develop Open SourceSoftware for Free where developers from around the globe can work collaboratively on projects, share ideas, post questions, etc.