Need stepper software with feed rate override and look ahead..

Group,

Haven't checked what's available in stepper contol software lately.
My last stepper projects were done with Indexer LPT. As far as I
know, Indexer still doesn't support feedrate override, does it?

Indexer does have look ahead so you can get continuous contouring (no
dwells between motion commands). I think most of the low end
packages are weak in continuous contouring.

Cutter radius comp would be nice , but not necessary for this project.

Needs to run under DOS. Must support at least 4 axis.

Anything on the market that meets these specs? Note: I don't know
anything about EMC, but it's probably more effort in implementation
than I want right now.

Thanks,

Doug