As I said, I can test different PIC codes with my Naomi1 and NetDimm.I agree that on the 627/628 it is more logical to use EC but please test this people!Technically speaking XT/HS should work regardless (the difference is current gain to drive an oscillator circuit on CLKOUT, but the dimm is using a clock generator). The 628 has the EC (external clock) option, which the 621 does not. EC will enable CLKIN pin, and disable the driver on CLKOUT.
If programming PIC16F628A, use EC (EXTCLK) as that is the best option for the application
Maybe EC will be better on Chihiro/Triforce as well but I would like to see hardware pictures first!
Unfortunately I don't have a Chihiro or a Triforce.
One thing that is not really clear to me is which kind of behaviour I'm supposed to see checking the different codes.
I'm still using werejag's code till now and I can't see any problem, so testing HS mode or EC mode is obviously doable but I'm not sure what to expect from the different codes.