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// tk-random.h: Smaller pseudo-random function(s).
// Copyright (C) 2015-2023 Selene ToyKeeper
// SPDX-License-Identifier: GPL-3.0-or-later
#pragma once
uint8_t pgm_rand() {
static uint16_t offset = 255;
// loop through ROM space, but avoid the first 256 bytes
// because the beginning tends to have a big ramp which
// doesn't look very random at all
offset = ((offset + 1) & 0x3ff) | 0x0100;
return pgm_read_byte(offset);
}
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