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 (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.
00		End of data
01		End of line
02		End of frame
03		End of segment (increment segment index and reset data pointer)
n4		Skip n bytes (1-16)
05	nn	Skip nn bytes (1-256)
06	nnnn	Skip nnnn bytes (1-65536)
07		Skip a frame
n8	vv	Fill n bytes (1-256) with vv value
09	vv,nn	Fill nn bytes (1-256) with vv value
0A	vv,nnnn	Fill nnnn bytes (1-65536) with vv value
0B	vv	Fill a full frame with vv value
nC	vv[n]	Copy n bytes (1-256) from vv[n] data table
0D	nn,vv[nn]	Copy nn bytes (1-256) from vv[nn] data table
0E	nnnn,vv[nnnn]	Copy nnnn bytes (1-65536) 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)