System Controller Firmware

Structure (Header)

Offset	Size	Description	Notes
0x0	1	Header Index Magic	01/02/10/20
0x1	1	Header Size	0x10
0x2	2	Block Size	00 00 or 04 00 or 08 00

78K0R/Kx3: 0x800
78K0R/Kx3-L: 0x400
RL78/G13: 0x400

Structure (Header Content Index 0x01)

Offset	Size	Description	Notes
0x4	4	Ernie Version	05 05 03 01
0x8	4	Hardware Info	38 50 80 00
0xC	4	Padding	00 00 00 00

Structure (Header Content Index 0x02)

Offset	Size	Description	Notes
0x4	4	Unknown 1	00 00 00 00
0x8	4	Encryption Type?	02 00 00 00 for RL78 / 01 00 00 00 for 78K0R / 00 00 00 00 for 78K0R Proto (0.931 has this)
0xC	4	Padding	00 00 00 00

• Encryption type 00 supported since at least 0.931 (0.902 doesn't support this) until 1.692
• Encryption type 01 supported since 1.00
• Encryption type 02 supported since 2.50

Structure (Header Content Index 0x10)

Offset	Size	Description	Notes
0x4	4	Block Index	00 00 00 00 / 01 00 00 00 / etc
0x8	4	Block Size	00 04 00 00 or 00 08 00 00
0xC	4	Padding	00 00 00 00

78K0R/Kx3: 0x800
78K0R/Kx3-L: 0x400
RL78/G13: 0x400

Structure (Footer)

Offset	Size	Description	Notes
0x0	4	Unknown	20 18 00 00
0x4	0x14	Sha-1 Hash of Decrypted Blocks Concatenated