A MOD player was my first ever real x86 asm program - I remember discovering that trick too - store the 16.16 value rotated by 16 bits, then use ADD and ADC to

A MOD player was my first ever real x86 asm program - I remember discovering that trick too - store the 16.16 value rotated by 16 bits, then use ADD and ADC to increment it according to frequency. Good times!