Adding newly dumped version of Scud Race

[gm-matthew]

Allow Step 1.5 games to access 53C810 via 0xC00000xx if the netboard is disabled; scuddxo requires this for 3D graphics to work

Also scuddx does not use the netboard

[dukeeeey]

Looks great, my only comment is read8 etc are hot functions. String comparison can be expensive in those functions. It would be better if we used some hexvalue or bitvalues to represent the version so the logic could be done with an integer comparison.

[gm-matthew]

LoadGame() has a line of code that converts the game stepping string to an integer value before passing it to GPU.SetStepping(); perhaps we could save this value and compare using it instead of the string. I’ll have a crack at it this evening.