MSX picture formats

MODE2 : 256x192 Support for the MSX pictures. More...

Collaboration diagram for MSX picture formats:

Functions
static int	Check_MSX_BSAVE_format (FILE *file, word *begin, word *end, word *exec)
	Check if the file is in the MSX BSAVE format. More...
void	Test_MSX (T_IO_Context *context, FILE *file)
void	Load_MSX (T_IO_Context *context)
	Load a MSX Screen 2 picture. More...
void	Save_MSX (T_IO_Context *context)
	Save MSX .SC2 file. More...

Detailed Description

MODE2 : 256x192 Support for the MSX pictures.

• SC2 "BSAVE" files

Function Documentation

Check_MSX_BSAVE_format()

static int Check_MSX_BSAVE_format ( FILE *  file, word *  begin, word *  end, word *  exec  )

static

Check if the file is in the MSX BSAVE format.

Reads 7 bytes.

Parameters

file
begin	load address
end	end address
exec	execution address for BLOAD ,R

Returns

0 if the file is not in BSAVE format

References NULL, Read_byte(), and Read_word_le().

Referenced by Load_MSX(), and Test_MSX().

Test_MSX()

void Test_MSX	(	T_IO_Context *	context,
		FILE *	file
	)

References Check_MSX_BSAVE_format(), File_error, GFX2_DEBUG, and GFX2_Log().

Load_MSX()

void Load_MSX

(

T_IO_Context *

context

)

Load a MSX Screen 2 picture.

TMS9918 Mode II VRAM layout :

• 0000-17FF : Pattern table
• 1800-1AFF : Name table
• 1B00-1B7F : Sprite attributes
• 1B80-1FFF : UNUSED (1B80-1BAF = Palette)
• 2000-37FF : Color table
• 3800-3FFF : Sprite patterns

References Check_MSX_BSAVE_format(), T_Config::Clear_palette, Config, File_error, File_length_file(), FORMAT_MSX, GFX2_DEBUG, GFX2_Log(), MSX_set_palette(), Open_file_read(), T_IO_Context::Palette, PIXEL_SIMPLE, Pre_load(), Read_bytes(), Set_loading_layer(), Set_pixel(), and T_IO_Context::Transparent_color.

Save_MSX()

void Save_MSX

(

T_IO_Context *

context

)

Save MSX .SC2 file.

Uses the BSAVE/BLOAD file format. equivalent to BSAVE "FILE.SC2",&H0,&H37FF,S

The MSX pictures are 256x192 pixels with a 15 colors fixed palette. Color #0 is transparent.

See also

https://www.msx.org/wiki/BSAVE

https://lospec.com/palette-list/msx

Todo:

save sprites

References File_error, Get_pixel(), GFX2_Log(), GFX2_WARNING, NULL, Open_file_write(), Write_byte(), Write_bytes(), and Write_word_le().