a Golang implementation of Vsav's PRNG function

vsav_prng.go

package main

import "fmt"

var currSeed = 0x01 // 0xff80d4
var currPrn = 0xc3  // 0xff80d5

func main() {
	for range 12 {
		getNextRng()
	}
}

func getNextRng() int {
	var newSeedAndPrn = getSeedAndPrnAsWord()
	newSeedAndPrn *= 3
	newSeedAndPrn &= 0xffff            // keep it 16 bit
	newSeedAndPrn /= 256               // lsr 8
	var newSeed = newSeedAndPrn & 0xff // lower byte only
	currPrn += newSeed
	currPrn &= 0xff
	currSeed = newSeed
	currSeed &= 0xff
	fmt.Printf("0xff80d4.w = 0x%.04x\n", getSeedAndPrnAsWord())
	return currPrn
}

func getSeedAndPrnAsWord() int {
	return (currSeed << 8) | currPrn
}