Difference between revisions of "MGV"

From MSX Game Library
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  │ │  │  │  └──┴──┴──┴── File format version (0-15)
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  └─────────────────────── Include video format data (4 bytes)
 
  └─────────────────────── Include video format data (4 bytes)
 
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│  │  │  │  └──┴──┴──┴── Screen mode
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      │  │  └──┴──┴──┴── Screen mode (0-15)
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│  │  └──┴────────────── Bit per pixel (0: 1-bit, 1: 2-bit, 2: 4-bit, 3: 8-bit)
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      └──┴────────────── Bit per pixel (0: 1-bit, 1: 2-bit, 2: 4-bit, 3: 8-bit)
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Screen mode:
 
Screen mode:
 
* 0: Text 1 (40x27)
 
* 0: Text 1 (40x27)
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  │ │  │  │  └──┴──┴──┴── Frame delay (1-16)
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  │           └──┴──┴──┴── Frame delay (1-16)
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  └─────────────────────── Frequency (0: 50 Hz, 1: 60 Hz)
 
  └─────────────────────── Frequency (0: 50 Hz, 1: 60 Hz)
 
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Revision as of 23:46, 30 March 2024

MGLV is a video format for MSXgl.

Format

Header

Offset Size Desc. Value
0x0000 4 Signature "MGLV"
0x0004 1 Flag 
7  6  5  4  3  2  1  0
│           └──┴──┴──┴── File format version (0-15)
└─────────────────────── Include video format data (4 bytes)
(0x0005) 1 Video format - Mode 
7  6  5  4  3  2  1  0
      │  │  └──┴──┴──┴── Screen mode (0-15)
      └──┴────────────── Bit per pixel (0: 1-bit, 1: 2-bit, 2: 4-bit, 3: 8-bit)

Screen mode:

  • 0: Text 1 (40x27)
  • 1: Graphic 1 (32x27)
  • 2: Graphic 2 (32x27)
  • 3: Multi Color (64x53)
  • 4: Text 2 (80x27)
  • 5: Graphic 3 (32x27)
  • 6: Graphic 4 (256x212 16 colors)
  • 7: Graphic 5 (512x212 4 colors)
  • 6: Graphic 6 (512x212 16 colors)
  • 7: Graphic 7 (256x212 256 colors)
  • 8: Graphic 3 mirrored (undocumented)
(0x0006) 1 Video format - Speed 
7  6  5  4  3  2  1  0
│           └──┴──┴──┴── Frame delay (1-16)
└─────────────────────── Frequency (0: 50 Hz, 1: 60 Hz)
(0x0007) 1 Video format - Width 1-256
(0x0008) 1 Video format - Height 1-256

Commands

Cmd Options Desc.
0x00 End of data
0x01 End of frame
0x02 End of segment (increment segment index and reset data pointer)
0x03
0x04 nn Skip nn+1 bytes (1-256)
0x05 nnnn Skip nnnn bytes (1-65536)
0x06 nn,vv Fill nn bytes (1-256) with vv value
0x07 nnnn,vv Fill nnnn bytes (1-65536) with vv value
0x08 nn,vv[nn] Copy nn bytes (1-256) from vv[nn] data table
0x09 nnnn,vv[nnnn] Copy nnnn bytes (1-65536) from vv[nnnn] data table
0x0A
0x0B
0x0C vv Fill full frame with vv value
0x0D
0x0E
0x0F

Extension

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

Retrieved from "https://aoineko.org/msxgl/index.php?title=MGV&oldid=2644"