•	ncb_timer	-	central module, contains character device operations, timer interrupt handler, initializes other modules.
•	stepper	-	contains code that handles stepper motors: acceleration etc.
•	timer_lapic	-	timer module utilizing Local APIC timer of the bootstrap processor.
•	timer_i8254	-	timer module utilizing good old Intel 8254 timer.
•	timer_nonrt	-	non-realtime timer module that uses kernel timer API. It allows to debug MyNC while running a non-patched kernel.
•	mfirst	-	this is actually a driver for a specific dedicated I/O board. It can serve as an example of how to connect MyNC with real hardware.
•	mspk	-	a module that imitates motor noise using PC speaker. It provides evidence of some work being performed in the absence of real motors.

Only one timer module can be loaded at a time because they contain duplicate symbols. timer_lapic module is meant to be used with -mync kernels. timer_i8254 is legacy and can be used only with old 2.6.5-ds kernel patch which you can find here.