ref: 61dbfa440bd83b8bb490ec7e1c44ea6f0aed66df
dir: /engine/rng.asm/
GenRandom_: ; 13a8f (4:7a8f) ; generate a random 16-bit integer and store it at $FFD3,$FFD4 ld a,[rDIV] ld b,a ld a,[H_RAND1] adc b ld [H_RAND1],a ld a,[rDIV] ld b,a ld a,[H_RAND2] sbc b ld [H_RAND2],a ret