Thanks. It would have been a lot easier if the information I was looking for was stated in laymen's terms on the product pages. Specifically mentioning which steering wheels are supported and the like (pedals, shifters, etc).
Product pages?

(oh, okay, you mean for the opti-pac, etc. I think Andy assumes most people were around when the products were introduced here. And I think DaveB assumes you know what you would use the products for.)
Now you've lost me. 5K, 100K pots? What kind of pots do 270 wheels and analog pedals have?
Does it depend on the wheel? I'm thinking about trying to buy 2 super sprint wheels (360s) and the middle (270) wheel I haven't given any thought to. I want to play Hard Drivin, Cruis'n USA, spy hunter, and maybe outrun. Although if it turns out to be too expensive I might just buy a PC USB wheel and use that as my 270 wheel.
Yep, it depends, MOST arcade controls used 5K pots. MOST PC controls used 100K pots. That's what made the dual-strike such a popular hack - b/c it used 5K pots so the electronics worked just fine with arcade controllers.
Mmmm, minipac - yeah I didn't understand this product. I see it says it works with optical devices.
Does this all sound right?:
analog implies to me 270 wheels and of course analog pedals.
digital implies digital pedals. (buttons & standard joysticks - of course)
optical implies 360 wheels.
Now... stick shifts? I'm going to have to do some digging to see what kind I need and whether they're digital or analog.
Joseph Elwell.
Mini-pac is basically an I-PAC and half an Opti-Pac on the same board.
You have the analog-digital-optical correct.
Shifters are digital - but . . . - here's where it gets confusing:
Take a standard Hi-Lo shifter like Pole Position.
Sometimes the shifter was centered and moving it up or down selected Hi or Lo gear.
More often, it was spring-loaded to LO and moving it put it momentarily in HI.
But . . . it might have two switches, the LO normally on all the time, and the HI on when in that position, or it might only have one switch for HI which is normally off.
And regardless of how it actually works, MAME may have set it up to work best with a keyboard rather than the authentic hardware.
Hopefully I didn't really lose you with that, but bottom line is you are probably going to have to see how the various driving games handle the shifters and then set yours up to work with them.