How does payroll software split CPF contributions between an employee's Ordinary, Special, and MediSave accounts in Singapore?

Omni HR calculates the right CPF contribution by age and salary band, then splits it across Ordinary, Special, and MediSave accounts automatically. The CPF EZPay file comes out with that split already done, as part of the same Singapore payroll module that produces IR8A and Appendix 8A at year-end.