Difference between revisions of "MGV"

From MSX Game Library

(→‎Commands)
(→‎Commands)
Line 72: Line 72:
  
 
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|-
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| <tt>n4</tt> || || Skip <tt>n+1</tt> bytes (1-16)
+
| <tt>n4</tt> || || Skip <tt>n+1</tt> bytes (1-15)
 
|-
 
|-
−
| <tt>05</tt> || <tt>nn</tt> || Skip <tt>nn+1</tt> bytes (1-256)
+
| <tt>05</tt> || <tt>nn</tt> || Skip <tt>nn+1</tt> bytes (1-255)
 
|-
 
|-
 
| <tt>06</tt> || <tt>nnnn</tt> || Skip <tt>nnnn</tt> bytes (1-65535)
 
| <tt>06</tt> || <tt>nnnn</tt> || Skip <tt>nnnn</tt> bytes (1-65535)
Line 81: Line 81:
  
 
|-
 
|-
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| <tt>n8</tt> || <tt>vv</tt> || Fill <tt>n+4</tt> bytes (4-19) with <tt>vv</tt> value
+
| <tt>n8</tt> || <tt>vv</tt> || Fill <tt>n</tt> bytes (1-15) with <tt>vv</tt> value
 
|-
 
|-
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| <tt>09</tt> || <tt>vv,nn</tt> || Fill <tt>nn+1</tt> bytes (1-256) with <tt>vv</tt> value
+
| <tt>09</tt> || <tt>vv,nn</tt> || Fill <tt>nn</tt> bytes (1-255) with <tt>vv</tt> value
 
|-
 
|-
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| <tt>0A</tt> || <tt>vv,nnnn</tt> || Fill <tt>nnnn</tt> bytes (0-65535) with <tt>vv</tt> value
+
| <tt>0A</tt> || <tt>vv,nnnn</tt> || Fill <tt>nnnn</tt> bytes (1-65535) with <tt>vv</tt> value
 
|-
 
|-
 
| <tt>0B</tt> || <tt>vv</tt> || Fill a full frame with <tt>vv</tt> value
 
| <tt>0B</tt> || <tt>vv</tt> || Fill a full frame with <tt>vv</tt> value
  
 
|-
 
|-
−
| <tt>nC</tt> || <tt>vv[n]</tt> || Copy <tt>n+1</tt> bytes (1-16) from <tt>vv[n]</tt> data table
+
| <tt>nC</tt> || <tt>vv[n]</tt> || Copy <tt>n+1</tt> bytes (1-15) from <tt>vv[n]</tt> data table
 
|-
 
|-
−
| <tt>0D</tt> || <tt>nn,vv[nn]</tt> || Copy <tt>nn+1</tt> bytes (1-256) from <tt>vv[nn]</tt> data table
+
| <tt>0D</tt> || <tt>nn,vv[nn]</tt> || Copy <tt>nn+1</tt> bytes (1-255) from <tt>vv[nn]</tt> data table
 
|-
 
|-
−
| <tt>0E</tt> || <tt>nnnn,vv[nnnn]</tt> || Copy <tt>nnnn</tt> bytes (0-65535) from <tt>vv[nnnn]</tt> data table
+
| <tt>0E</tt> || <tt>nnnn,vv[nnnn]</tt> || Copy <tt>nnnn</tt> bytes (1-65535) from <tt>vv[nnnn]</tt> data table
 
|-
 
|-
 
| <tt>0F</tt> || <tt>vv[]</tt> || Copy a full frame from data table (raw frame)
 
| <tt>0F</tt> || <tt>vv[]</tt> || Copy a full frame from data table (raw frame)

Revision as of 01:02, 31 March 2024

MGLV is a video format for MSXgl.

Format

Header

Offset Size Desc. Value
0x0000 3 Signature "MGV"
0x0003 1 Flag 
7  6  5  4  3  2  1  0
│        │  └──┴──┴──┴── File format version (0-15)
│        └────────────── Segment size (0: 8 KB, 1: 16 KB)
└─────────────────────── Include video format data (4 bytes)
(0x0004) 1 Video format - Image 
7  6  5  4  3  2  1  0
│  │  │     └──┴──┴──┴── Screen mode (0-15)
│  │  └───────────────── Screen width (0: 256 px, 1: 512 px)
└──┴──────────────────── Bit per pixel (0: 1-bit, 1: 2-bit, 2: 4-bit, 3: 8-bit)

Screen mode:

  • 0: Text 1 (Screen 0 width 40, 40x27)
  • 1: Graphic 1 (Screen 1, 32x27)
  • 2: Graphic 2 (Screen 2, 32x27)
  • 3: Multi Color (Screen 3, 64x53)
  • 4: Text 2 (Screen 0 width 80, 80x27)
  • 5: Graphic 3 (Screen 4, 32x27)
  • 6: Graphic 4 (Screen 5, 256x212, 16 colors)
  • 7: Graphic 5 (Screen 6, 512x212, 4 colors)
  • 6: Graphic 6 (Screen 7, 512x212, 16 colors)
  • 7: Graphic 7 (Screen 8, 256x212, 256 colors)
  • 8: Graphic 7 + YJK + YAE (Screen 10, 256x212, X colors)
  • 9: Graphic 7 + YJK (Screen 12, 256x212, X colors)
  • 10: Graphic 3 mirrored 0000 (undocumented)
  • 11: Graphic 3 mirrored 0101 (undocumented)
  • 12: Graphic 3 mirrored 0022 (undocumented)
(0x0005) 1 Video format - Replay 
7  6  5  4  3  2  1  0
│  │        └──┴──┴──┴── Frame skip (0-15)
│  └──────────────────── Loop (0: No, 1: Yes)
└─────────────────────── Frequency (0: 50 Hz, 1: 60 Hz)
(0x0006) 1 Video format - Width 1-256 (or 2-512 for Screen mode 6 and 7)
(0x0007) 1 Video format - Height 1-256

Commands

Cmd Options Desc.
00 End of data
01 End of line
x2 Switch to table

x:

  • 0: Pattern table (default)
  • 1: Color table (screen mode 1, 2 and 3)
  • 2: Layout table (tile based modes)
03 End of segment (increment segment index and reset data pointer)
n4 Skip n+1 bytes (1-15)
05 nn Skip nn+1 bytes (1-255)
06 nnnn Skip nnnn bytes (1-65535)
07 Skip a frame / End of frame
n8 vv Fill n bytes (1-15) with vv value
09 vv,nn Fill nn bytes (1-255) with vv value
0A vv,nnnn Fill nnnn bytes (1-65535) with vv value
0B vv Fill a full frame with vv value
nC vv[n] Copy n+1 bytes (1-15) from vv[n] data table
0D nn,vv[nn] Copy nn+1 bytes (1-255) from vv[nn] data table
0E nnnn,vv[nnnn] Copy nnnn bytes (1-65535) from vv[nnnn] data table
0F vv[] Copy a full frame from data table (raw frame)

Extension

.MGLV (for Windows/Linux) or .MGV (for MSX-DOS)

Retrieved from "https://aoineko.org/msxgl/index.php?title=MGV&oldid=2662"