MGV

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 (3 bytes)
(0x0005)	1	Video format - Mode	7 6 5 4 3 2 1 0 │ │ │ │ └──┴──┴──┴── Screen mode │ │ └──┴────────────── Bit per pixel (0: 1-bit, 1: 2-bit, 2: 4-bit, 3: 8-bit) │ └──────────────────── Frequency (0: 50 Hz, 1: 60 Hz) └─────────────────────── 0: Text 1 1: Graphic 1 2: Graphic 2 3: Multi Color 4: Text 2 5: Graphic 3 6: Graphic 4 7: Graphic 5 6: Graphic 6 7: Graphic 7 8: Graphic 3 mirrored (undocumented)
(0x0006)	1	Video format - Width	1-256
(0x0007)	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)