Aoineko at 19:59, 26 April 2025

2025-04-26T19:59:52Z

Aoineko at 19:59, 26 April 2025

2025-04-26T19:59:28Z

Aoineko at 00:06, 31 March 2024

2024-03-31T00:06:38Z

Aoineko at 22:50, 15 January 2024

2024-01-15T22:50:41Z

Show changes

Aoineko at 22:36, 15 December 2023

2023-12-15T22:36:55Z

Aoineko: Created page with "

 ==============================================================================  HEADER  (4 bytes) =======================================================================..."

2023-07-27T17:09:04Z

Created page with "<pre> ============================================================================== HEADER (4 bytes) =======================================================================..."

New page

<pre>
==============================================================================
HEADER (4 bytes)
==============================================================================
nn nn "LVGM" Light-VGM identifier
nn Options
7 6 5 4 3 2 1 0
│ │ │ │ │ └── Frequency (0: 60 Hz, 1: 50 Hz)
│ │ │ │ └──── Loop data included
└─┴─┴─┴────────── File format version (0)
nn Devices
7 6 5 4 3 2 1 0
│ │ │ │ │ │ └── Include PSG data (AY-3-8910)
│ │ │ │ │ └──── Include MSX-MUSIC data (YM2413/OPLL)
│ │ │ │ └────── Include MSX-AUDIO data (Y8950/OPL1+ADPCM)
│ │ │ └──────── Include SCC data (K051649)
│ │ └────────── Include SCC+ data (K052539)
│ └──────────── Include secondary PSG data
└──────────────── Include Moonsound data (YMF278/OPL4)

==============================================================================
COMMON DATA (D0~FF)
==============================================================================

Opcode Action
------------------------------------------------------------------------------
Dn Wait n+1 cycles (1~16)
..............................................................................
En rr vv[] Copy n+3 bytes (3~18) from register #rr
..............................................................................
F0 Start of PSG chunk (default when not defined)
F1 Start of MSX-MUSIC chunk
F2 Start of MSX-AUDIO chunk
F3 Start of SCC chunk
F4 Start of SCC+ chunk
F5 Start of secondary PSG chunk
F7 Start of Moonsound chunk

FD nn rr vv[] Copy nn bytes (0~255) from register #rr

FE nn nn End of song with loop
FF End of song (without loop)
..............................................................................
Not used: F6, F8~FC

==============================================================================
PSG DATA (00~CF)
==============================================================================

Opcode Action
------------------------------------------------------------------------------
Tone Period
------------------------------------------------------------------------------
00 nn R#0 = nn
1n R#1 = n
02 nn R#2 = nn
2n R#3 = n
04 nn R#4 = nn
3n R#5 = n
------------------------------------------------------------------------------
Noise Period
------------------------------------------------------------------------------
4n R#6 = n
5n R#6 = n | 0x10
------------------------------------------------------------------------------
Mixer
------------------------------------------------------------------------------
07 nn R#7 = nn
------------------------------------------------------------------------------
Tone Amplitude
------------------------------------------------------------------------------
6n R#8 = n
7n R#8 = n | 0x10
8n R#9 = n
9n R#9 = n | 0x10
An R#A = n
Bn R#A = n | 0x10
------------------------------------------------------------------------------
Envelope Period
------------------------------------------------------------------------------
0B nn R#11 = nn
0C nn R#12 = nn
------------------------------------------------------------------------------
Envelope Shape
------------------------------------------------------------------------------
Cn R#13 = n
..............................................................................
Not used: 01, 03, 05, 06, 08, 09, 0A, 0D~0F

==============================================================================
MSX-MUSIC DATA (00~CF)
==============================================================================

Opcode Action
------------------------------------------------------------------------------
rr nn Register #rr (00~38) set to nn

40 nn[8] User Tone (copy 8 bytes from R#0)
50 nn[9] F-Number (copy 9 bytes from R#10)
60 nn[9] Setting (copy 9 bytes from R#20)
70 nn[9] Inst/col (copy 9 bytes from R#30)
..............................................................................
Not used: 08~0D, 19~1F, 29~2F, 39~3F, 41~4F,
51~5F, 61~6F, 71~CF

==============================================================================
MSX-AUDIO DATA (00~CF)
==============================================================================

Opcode Action
------------------------------------------------------------------------------
rr nn Register #rr (00~C8) set to nn

1F nn[8] User Tone 1 (copy 8 bytes in 20,23,40,43,60,63,80,83)
2F nn[8] User Tone 2 (copy 8 bytes in 21,24,41,44,61,64,81,84)
3F nn[8] User Tone 3 (copy 8 bytes in 22,25,42,45,62,65,82,85)
4F nn[8] User Tone 4 (copy 8 bytes in 28,2B,48,4B,68,6B,88,8B)
5F nn[8] User Tone 5 (copy 8 bytes in 29,2C,49,4C,69,6C,89,8C)
6F nn[8] User Tone 6 (copy 8 bytes in 2A,2D,4A,4D,6A,6D,8A,8D)
7F nn[8] User Tone 7 (copy 8 bytes in 30,33,50,53,70,73,90,93)
8F nn[8] User Tone 8 (copy 8 bytes in 31,34,51,54,71,74,91,94)
9F nn[8] User Tone 9 (copy 8 bytes in 32,35,52,55,72,75,92,95)
..............................................................................
Not used: 13~14, 1B~1E, 26~27, 2E, 36~3E, 46~47,
4E, 56~5E, 66~67, 6E, 76~7E, 86~87, 8E, 96~9E,
A9~AF, B9~BC, BE~BF, C9~CF

==============================================================================
SCC/SCC+ DATA (00~CF)
==============================================================================

Opcode Action
------------------------------------------------------------------------------
rr nn Register #rr (00h~C0h) set to nn

90 nn[32] Copy 32 bytes to channel 1 waveform (9800h)
92 nn[32] Copy 32 bytes to channel 2 waveform (9820h)
94 nn[32] Copy 32 bytes to channel 3 waveform (9840h)
96 nn[32] Copy 32 bytes to channel 4 waveform (9860h)
98 nn[32] Copy 32 bytes to channel 5 waveform (98A0h) (SCC+ only)
..............................................................................
Not used: 91, 93, 95, 97, 99~9F, C1~CF
</pre>

← Older revision		Revision as of 19:59, 26 April 2025
Line 1:		Line 1:
−	~~*~~lVGM~~*~~ is an audio format based on VGM but optimized for MSX.	+	'''lVGM''' is an audio format based on VGM but optimized for MSX.

	Last version can see on [https://raw.githubusercontent.com/aoineko-fr/MSXgl/main/engine/src/vgm/lvgm.txt GitHub].		Last version can see on [https://raw.githubusercontent.com/aoineko-fr/MSXgl/main/engine/src/vgm/lvgm.txt GitHub].

← Older revision		Revision as of 19:59, 26 April 2025
Line 1:		Line 1:
		+	*lVGM* is an audio format based on VGM but optimized for MSX.
		+
	Last version can see on [https://raw.githubusercontent.com/aoineko-fr/MSXgl/main/engine/src/vgm/lvgm.txt GitHub].		Last version can see on [https://raw.githubusercontent.com/aoineko-fr/MSXgl/main/engine/src/vgm/lvgm.txt GitHub].

← Older revision		Revision as of 00:06, 31 March 2024
Line 181:		Line 181:
	Not used: B5-B7, BD-BF		Not used: B5-B7, BD-BF
	</syntaxhighlight>		</syntaxhighlight>
		+
		+	[[Category:Format]]

← Older revision		Revision as of 22:36, 15 December 2023
Line 147:		Line 147:
	Not used: 91, 93, 95, 97, 99~9F, C1~CF		Not used: 91, 93, 95, 97, 99~9F, C1~CF
	</pre>		</pre>
		+	[[Category:Format]]

LVGM - Revision history

Aoineko at 19:59, 26 April 2025

Aoineko at 19:59, 26 April 2025

Aoineko at 00:06, 31 March 2024

Aoineko at 22:50, 15 January 2024

Aoineko at 22:36, 15 December 2023

Aoineko: Created page with "
============================================================================== HEADER (4 bytes) =======================================================================..."