loveemu

-- Lua 5.1: Super Mario World (Earlier N-SPC): Volume Calculation
-- Note that I do not handle a few things like tremolo
-- Also, note that it is somewhat different from modern N-SPC.

-- 1270:
local velocity_table = {
  0x08, 0x12, 0x1b, 0x24, 0x2c, 0x35, 0x3e, 0x47,
  0x51, 0x5a, 0x62, 0x6b, 0x7d, 0x8f, 0xa1, 0xb3
}

loveemu

diff -rdu src/gba_mus_riper.cpp src_patched/gba_mus_riper.cpp
--- src/gba_mus_riper.cpp	2014-12-22 07:03:19.000000000 +0900
+++ src_patched/gba_mus_riper.cpp	2015-01-24 18:17:27.764686700 +0900
@@ -33,6 +33,7 @@
 static bool rc = false;
 static bool sb = false;
 static bool raw = false;
+static bool force_output_unused = false;
 static uint32_t song_tbl_ptr = 0;
 

loveemu

Dragon Quest VII: Sound Engine Analysis

This is a technical analysis note of the sound engine of PS1 Dragon Quest VII.

DQVII uses a custom sound engine, developed by Heart Beat. PS1 Dragon Quest IV also uses the same sound engine.

Note: I used Japanese version of Dragon Quest VII (SLPM-86500)

loveemu

-- generic callback for breakpoint
function memory_breakpoint_callback(bp_address)
  local timestamp = os.date("%Y-%m-%d %H:%M:%S")
  local msg = string.format(timestamp .. " Breakpoint at %08X:", bp_address)

  local REGS = {
    "r0",
    "r1",
    "r2",
    "r3",

loveemu

0009 - Konami Wai Wai Racing Advance (Konami)
0012 - Power Pro Kun Pocket 3 (Konami)
0015 - Fire Pro Wrestling A (Spike)
0020 - Yu-Gi-Oh! Dungeon Dice Monsters (Konami)
0022 - J.League Pocket (Konami)
0024 - Monster Guardians (Konami)
0028 - Iridion 3D (Majesco Sales)
0030 - Ready 2 Rumble Boxing - Round 2 (Midway)
0031 - Konami Krazy Racers (Konami)
0033 - Tony Hawk's Pro Skater 2 (Activision)

loveemu

memory.registerexec(0x8ab414, function()
  local a = memory.getregister("a")
  local word_16 = memory.readword(0x7e0016)
  local word_18 = memory.readword(0x7e0018)
  local word_1a = memory.readword(0x7e001a)
  local word_1c = memory.readword(0x7e001c)
  print(string.format("Load waveform: a=$%04x, $16=$%02x, $18=$%02x, $1a=$%02x, $1c=$%02x", a, word_16, word_18, word_1a, word_1c))
end)

memory.registerexec(0x8ab1cb, function()

loveemu

GAX Sound Engine v1.99d (Mar 13 2001)   IRIDION3D    AGB-AI3E-USA 0028 - Iridion 3D (U)
GAX Sound Engine v1.99d (Mar 30 2001)   TONY HAWK 2! AGB-ATHE-USA 0033 - Tony Hawk's Pro Skater 2 (U)
GAX Sound Engine v1.99d (Mar 30 2001)   EWJ          AGB-AEJE-USA 0037 - Earthworm Jim (U)
GAX Sound Engine v1.99d (Mar 30 2001)   TONY HAWK 2! AGB-ATHD-DEU 0053 - Tony Hawk's Pro Skater 2 (G)
GAX Sound Engine v1.99d (Mar 30 2001)   TONY HAWK 2! AGB-ATHF-FRA 0059 - Tony Hawk's Pro Skater 2 (F)
GAX Sound Engine v1.99d (Mar 30 2001)   FORTRESS     AGB-AFOE-USA 0088 - Fortress (U)
GAX Sound Engine v2.01a (Jun  6 2001)   TANG TANG    AGB-ATAE-USA 0094 - Tang Tang (U)
GAX Sound Engine v1.99f (Jun 13 2001)   F14-TOMCAT   AGB-AFTE-USA 0096 - F-14 Tomcat (U)
GAX Sound Engine v2.01b (Jun 22 2001)   SPIDERMAN MM AGB-ASEE-USA 0115 - Spider-Man - Mysterio's Menace (U)
GAX Sound Engine v2.01a (Jun  6 2001)   CAESARPALACE AGB-ACPE-USA 0116 - Caesar's Palace Advance - Millennium Gold Edition (U)

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.

loveemu

Priority list:
Fairly OddParents: Breakin' Da Rules GBA
The Incredibles GBA
The Incredibles Rise of the Underminer GBA
LEGO Star Wars The Video Game GBA
LEGO Star Wars II: The Original Trilogy GBA
Cars GBA
Cars Mater-National Championship GBA
Ratatouille GBA

loveemu

Hachiemon Music Format Analysis

• Max channels: 12
• Similar to Standard MIDI Format 1
• BGM/SFX have different data structure

Music address table at 0x807EC8C (xref from 0x8069DEE), 19 song items available.

Song #0 and #1 are special. They are used for setup.