A rather simple question, which probably will have a complex answer. I'm trying to migrate to ConTeXt, since I want to have a layout not easily achieved with LaTeX (grid...). In LaTeX, MinionPro is working fine, including the math, after some voodoo and lots of hair pulling. I haven't touched it since. Now, how to get this stuff to work in ConTeXt as well? I started with the body font, that's the easy part. I have no clue where to look for the math font, or how to port/translate the TeX stuff I have to something ConTeXt will understand. Where do I begin?
Edit: To clarify, what I currently have is
\starttypescript [serif] [minionpro] \definefontsynonym [Serif] [name:minionproregular] [features=default] \stoptypescript \starttypescript [minionpro] \definetypeface [minionpro] [rm] [serif] [minionpro] [default] \definetypeface [minionpro] [mm] [math] [minionpro] [default] \stoptypescript \usetypescript [minionpro] \setupbodyfont [minionpro,10pt] \starttext Hi, this is text. A formula: $x + y = z$. \stoptext
This is obviously not enough information to make it go, it helpfully cries out with the error
error on line 14 in file tmp.tex: Math error: parameter \Umathquad\displaystyle is not set ...