Sprite Editor

binary format

Binary File Format

■File layout

offset	size	Explanation
$000	$100	header
$100	variable	pallet data
variable	variable	sprite data
variable	variable	pattern data

■Header

offset	size	function
$00	$10	Identifier="SEGA_SPRED_01.00"("_"=$20)
$10	long	Palette data offset address
$14	long	Palette data size (bytes)
$20	long	sprite data offset address
$24	long	Sprite data size (bytes)
$30	long	Pattern data offset address
$34	long	Pattern data size (bytes)
$38	$C8	Dummy data (all $00)

■Palette data

offset	size	function
$00	word	Color RAM mode
$02	$0E	Dummy data (all $00)
$10	variable	color code

●Color RAM mode

Mode 0 (0x0000)	16bit x 1024 colors
Mode 1 (0x1000)	16bit x 2048 colors
Mode 2 (0x2000)	32bit x 1024 colors

●Color code

MSB                           LSB
│ │    B    │    G    │    R    │
┌─┬─┬─┬─┬─┬─┬─┬─┬─┬─┬─┬─┬─┬─┬─┬─┐
│*│4│3│2│1│0│4│3│2│1│0│4│3│2│1│0│
└─┴─┴─┴─┴─┴─┴─┴─┴─┴─┴─┴─┴─┴─┴─┴─┘
*Can be set freely (usually 1b)

■Sprite data

offset	size	function
$00	word	Number of registered sprites
$02	$0E	Dummy data (all $00)
$10	variable	Sprite header x number of registered sprites
variable	variable	CG data

●Sprite header

offset	size	function
$00	word	Sprite H size
$02	word	Sprite V size
$04	word	color mode
$06	word	Color offset address *1
$08	long	CG data offset address *2
$0C	long	CG data size (bytes) *3

*1 Relative address from the beginning of color RAM

*2 Relative address from the beginning of CG data

*Apply 0x20Byte boundary to every 3 sprites

●CG data

When color mode = 0x0000,0x0001(4bit/dot)

MSB           LSB
│Even   │Odd    │
│coord  │coord  │
│code   │code   │
┌─┬─┬─┬─┬─┬─┬─┬─┐
│3│2│1│0│3│2│1│0│
└─┴─┴─┴─┴─┴─┴─┴─┘

When color mode = 0x0002, 0x0003, 0x0004 (8bit/dot)

MSB           LSB
│Pallete code   │
┌─┬─┬─┬─┬─┬─┬─┬─┐
│7│6│5│4│3│2│1│0│
└─┴─┴─┴─┴─┴─┴─┴─┘

When color mode = 0x0005 (16bit/dot)

MSB                           LSB
│ │    B    │    G    │    R    │
┌─┬─┬─┬─┬─┬─┬─┬─┬─┬─┬─┬─┬─┬─┬─┬─┐
│*│4│3│2│1│0│4│3│2│1│0│4│3│2│1│0│
└─┴─┴─┴─┴─┴─┴─┴─┴─┴─┴─┴─┴─┴─┴─┴─┘

*Can be set freely (usually 1b)

■Pattern data

offset	size	function
$00	word	Number of registered patterns
$02	$0E	Dummy data (all $00)
$10	variable	Pattern header x number of registered patterns
variable	variable	Sprite placement data

●Pattern header

offset	size	function
$00	long	Sprite placement data offset address*
$04	word	Number of sprite entries
$06	$0A	Dummy data (all $00)

*Relative address from the beginning of sprite placement data

●Sprite arrangement data

offset	size	function
$00	word	Reversal information
$02	word	Dummy data ($0000)
$04	word	color mode
$06	word	Color RAM offset address
$08	word	CG data offset address
$0A	word	sprite size
$0C	word	Offset A (H coordinate)
$0E	word	Offset A (V coordinate)
$10	word	Offset B (H coordinate)
$12	word	Offset B (V coordinate)
$14	word	Offset C (H coordinate)
$16	word	Offset C (V coordinate)
$18	word	Offset D (H coordinate)
$1A	word	Offset D (V coordinate)
$1C	word	Dummy data ($FFFF)
$1E	word	sprite number

Reversal information

MSB                           LSB
│                   │Reverse │  │
│Unused             │   │Unused │
┌─┬─┬─┬─┬─┬─┬─┬─┬─┬─┬─┬─┬─┬─┬─┬─┐
│0│0│0│0│0│0│0│0│0│0│V│H│0│0│0│0│
└─┴─┴─┴─┴─┴─┴─┴─┴─┴─┴─┴─┴─┴─┴─┴─┘
V: VF=vertical inversion H:HF=horizontal inversion

color mode

MSB                              LSB
│                   │Color   │     │
│Unused             │mode    │     │
┌─┬─┬─┬─┬─┬─┬─┬─┬─┬─┼──┬──┬──┬─┬─┬─┐
│0│0│0│0│0│0│0│0│0│0│b2│b1│b0│0│0│0│
└─┴─┴─┴─┴─┴─┴─┴─┴─┴─┴──┴──┴──┴─┴─┴─┘
b2 b1 b0
0  0  0  Mode 0  16 colors (color bank)
0  0  1  Mode 1  16 colors (lookup table)
0  1  0  Mode 2  64 colors (color bank)
0  1  1  Mode 3  128 colors (color bank)
1  0  0  Mode 4  256 colors (color bank)
1  0  1  Mode 5  32K color (RGB)

Color RAM offset address

MSB                                         LSB
│Color RAM offset address */8H 
┌──┬──┬──┬──┬──┬──┬──┬──┬──┬──┬──┬──┬──┬──┬─┬─┐
│aD│aC│aB│aA│a9│a8│a7│a6│a5│a4│a3│a2│a1│a0│0│0│
└──┴──┴──┴──┴──┴──┴──┴──┴──┴──┴──┴──┴──┴──┴─┴─┘
*Relative address from the beginning of color RAM

CG data offset address

MSB                                         LSB
│CG data offset address */8H 
┌──┬──┬──┬──┬──┬──┬──┬──┬──┬──┬──┬──┬──┬──┬─┬─┐
│aD│aC│aB│aA│a9│a8│a7│a6│a5│a4│a3│a2│a1│a0│0│0│
└──┴──┴──┴──┴──┴──┴──┴──┴──┴──┴──┴──┴──┴──┴─┴─┘
*Relative address from the beginning of CG data

sprite size

MSB                                         LSB
│   │H size/8H        │V size                 │
┌─┬─┬──┬──┬──┬──┬──┬──┬──┬──┬──┬──┬──┬──┬──┬──┐
│0│0│h5│h4│h3│h2│h1│h0│v7│v6│v5│v4│v3│v2│v1│v0│
└─┴─┴──┴──┴──┴──┴──┴──┴──┴──┴──┴──┴──┴──┴──┴──┘

Offset A~D

Relative coordinate values between the pattern origin and each vertex of the sprite
Each vertex of A to D corresponds to the following position.

A        B
 ┏━━━━━━┓ 
 ┃      ┃ 
 ┃      ┃ 
 ┃      ┃ 
 ┃      ┃ 
 ┃      ┃ 
 ┗━━━━━━┛ 
D        C

★ Graphic Tools Guide ★ Format list