Gettys Servo Control

I found a junked Cincinnati Milacron and I got grazy idea if I could
rebuild it.
There is a servo motors and controllers, made by Gettys, still in the
machine. Type of the controller is 11-1010-97.

My idea is to control the servos by the computer.
But, I have some major difficulties, since I am not a servo expert in
any way, actually, I am not an expert in any area relating this
topic, so I do not have a faintest idea what kind of controlling
input is required for the servo controllers (i.e. amplifiers).

My origilal idea was to control the servos by the PC, probably via
its lpt-port, but it might be difficult with an old, most probably DC
servos?
Is there any board / program available that can handle the control of
DC servos?
I have read something about EMC / Servo To Go Inc combination but I
have understood the EMC works in linux. I am not familiar with linux
and if I want to try EMC, I have to install Linux and this means I
have to sacrifice one PC for it?

Is there any "retrofit" amplifiers for these servos, accepting e.g.
pulse/direction control method or even better if there is a converter
converting pulses to signal required for conrollers? Last option
might be impossible because of the feedback from the resolver?