Help please. Dip switches and mach 3 settings

[cropwell]

That Mobo has 4 SATA and 1 IDE port. The IDE port will support two devices and I would recommend you use Cable Select on the IDE drives look at this ---- https://support.hp.com/gb-en/document/bph03792 With Cable select the master is the first drive i.e. on the end cable connector and the slave is on the middle connector
SATA does not have that option and I see that the small drive cable tied to the box is SATA.

If you can set up XP on a separate drive, I would recommend it and don't mess about with dual booting. It looks as though you have a corrupt MBR (Master Boot Record).

The Mobo manual is here if you need it https://www.dropbox.com/s/vmr7ucg4kw..._1333.pdf?dl=0