simondotm

We use Deflemask to author SN76489 chip music, for which support is aimed mainly at NTSC Sega Master System. We export these tunes as VGMs from Deflemask and then to get them working on a BBC Micro we have to do some shenanigans because the BBC version of the SN76489 has two key differences from the SMS:

1. It is clocked at 4Mhz not 3.58Mhz
2. It has a 15-bit linear-feedback shift register (LFSR) for noise channel generation (the SMS version has 16-bits).

Because the squarewave output of the sound chip is driven by its clockspeed, to transpose frequencies from NTSC to 4Mhz we have to adjust every pitch value sent to the chip registers. This is done mathematically by converting the NTSC pitch register value to Hz and then calculating the equivalent pitch register value on a 4Mhz clocked chip to deliver the same Hz frequency.

That bit is easy (ish).

The tricky bit is when musicians use the tuned periodic noise function on the chip to create basslines. In this scenario channel 2 pitch controls the pitch of t

innocuo

using System.Collections;
using System.Collections.Generic;
using UnityEditor;
using UnityEngine;

public class AddUV : MonoBehaviour
{
    public Mesh mesh;
    
    void Awake()

hsiboy

#include <DmxReceiver.h>
#include <FastLED.h>

#define DMX_NUM_CHANNELS 15
#define NUM_LEDS 15
#define DATA_PIN 11
#define LED_TYPE WS2811
#define COLOUR_ORDER
#define CLOCK_PIN 13 // Clock pin only needed for SPI based chipsets when not using hardware SPI

tablatronix

void scrollString(String str) {
    int yoff = 1;
    display.clearDisplay();
    display.setTextWrap(false);  // we don't wrap text so it scrolls nicely
    display.setTextSize(2);
    display.setRotation(0);
    int charWidth = 12; // textsize 2 @todo auto calculate charwidth from font
    int pxwidth = (str.length()*charWidth)+32; // @todo get actual string pixel length, add support to gfx if needed
    for (int32_t x=charWidth; x>=-pxwidth; x--) {

PyYoshi

--- kernel/deckard/arch/arm/configs/deckard_defconfig
+++ kernel/deckard/arch/arm/configs/deckard_defconfig
@@ -35,7 +35,7 @@
 CONFIG_INIT_ENV_ARG_LIMIT=32
 CONFIG_LOCALVERSION="$(KERNEL_LOCAL_VERSION)-perf"
 # CONFIG_LOCALVERSION_AUTO is not set
-# CONFIG_SWAP is not set
+CONFIG_SWAP=y
 CONFIG_SYSVIPC=y
 CONFIG_SYSVIPC_SYSCTL=y

loveemu

Shin'en GAX Sound Engine (GBA) Specification

The research is based on GAX Engine V3. Information about V2 can be found at the end of the document.

FYI: GaXM is a tool that can analyze GAX data. You may find more information there.

FYI: You can find my IDA FLIRT signature for GAX V3 here. https://github.com/loveemu/ida-sig

FYI: Gaxtapper: Diagnostic tool / Automated GSF ripper for GAX Sound Engine.

edro15

Scenario:

• multiple USB devices plugged via hub to a host (Linux OS based),
• multiple services/programs interacting with TTY running on top (e.g. GPSd)

Problem:

At boot TTY are randomly assigned to devices causing depending services/programs instabilities. They could indeed fail to start because of different TTY configurations.

Solution:

probonopd

M-VAVE SMK-37 PRO

https://www.m-vave.com/productinfo/1431195.html

The M-VAVE SMK-37 PRO is a MIDI keyboard (controller) with a built-in DX7 compatible FM tone generator.

It would be so much more valuable if the firmware would be open source for the community to modify and improve.

Note to manufacturer

bryc

DX7

These are the original 32 algorithms as used in Yamaha DX7.

The later Yamaha FS1R and Yamaha SY77 may have compatibility with these algorithms, but that's beyond the current scope. The FS1R contains 88 algorithms, while the SY77 contains 45 algorithms.

DX9

alexanderameye

using System.Collections.Generic;
using System.IO;
using UnityEditor;
using UnityEditor.Overlays;
using UnityEditor.SceneManagement;
using UnityEditor.Toolbars;
using UnityEngine;
using UnityEngine.SceneManagement;
using UnityEngine.UIElements;