if it is reasonably straight grained, I have used splitting wedges before. if it is less straight grained, you can still do it, but it is harder work.
not sure if it is correct, but I stand it on end and hammer in a wedge near the edge, to start the split. Then lay it on its side and put a wedge in the split. As it opens, put another in and work the split along- this can be the one from the end. 3 wedges are ideal. I have steel, but it might work with timber ones too, particularly when started.
I have an electric chainsaw, but I tend to split logs (the few that I process for turning) when I can because I quite like doing it that way and it is quicker than finding chainsaw oil, setting it up for a safe cut, getting the extension lead out, sharpening the thing etc.