CASIO Container Format¶
Multiple file formats by CASIO use what has been named a “standard header” by the community. Said header is 32 (0x20) bytes long, and is obfuscated using bitwise NOT.
Offset |
Size |
Field name |
Description |
Values |
|---|---|---|---|---|
0 (0x00) |
14 B |
File Type (FT) |
Type of the file. |
See the subsections below. |
14 (0x0E) |
1 B |
Control 1 (C1) |
First control byte. |
Should be set to |
15 (0x0F) |
1 B |
Reserved |
Should be set to |
|
16 (0x10) |
4 B |
File Size (FS) |
Big endian 32-bit integer. |
|
20 (0x14) |
1 B |
Control 2 (C2) |
Second control byte. |
Should be set to |
21 (0x15) |
7 B |
Reserved |
Should be set to |
|
28 (0x1C) |
2 B |
Obfuscation Options |
||
30 (0x1E) |
2 B |
Object Count (OC) |
Big endian 16-bit integer. |
Some formats have a standard subheader, with the following formats:
Offset |
Size |
Field name |
Description |
Values |
||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
0 (0x00) |
4 B |
Checksum (CS) |
Big endian 32-bit integer. |
|||||||||||
4 (0x04) |
1 B |
File type (FT) |
Value set according to the file type:
|
|||||||||||
5 (0x05) |
1 B |
Target platform (FP) |
Value set according to the targeted platform:
|
|||||||||||
6 (0x06) |
4 B |
Reserved. |
Set to |
|||||||||||
10 (0x0A) |
4 B |
Data Size (DS) |
Big endian 32-bit integer. |
|||||||||||
14 (0x0E) |
4 B |
Control value (C3) |
Big endian 32-bit integer. This should be set depending on the platform to:
|
|||||||||||
18 (0x12) |
4 B |
Reserved. |
Set to |
|||||||||||
22 (0x16) |
4 B |
Message Zone Size (MZS) |
Big endian 32-bit integer. Unreliable, may and should be set to 0. |
|||||||||||
26 (0x1A) |
6 B |
Targeted Add-in Platform (AP) |
For C1A, should be set to |
|||||||||||
32 (0x20) |
28 B |
Title (T) |
Title or language name. |
|||||||||||
60 (0x3C) |
4 B |
File Size (FS) |
Big endian 32-bit integer. |
|||||||||||
64 (0x40) |
11 B |
Internal Add-in Name (IN) |
||||||||||||
75 (0x4B) |
192 B |
Language Labels |
8 times a 24 bytes long string. |
|||||||||||
267 (0x10B) |
1 B |
e-Activity strip flag (EAS) |
Available values are the following:
|
|||||||||||
268 (0x10C) |
4 B |
Reserved |
Set to |
|||||||||||
272 (0x110) |
10 B |
Add-in version. |
||||||||||||
282 (0x11A) |
2 B |
Reserved. |
Set to |
|||||||||||
284 (0x11C) |
14 B |
Timestamp |
|
CASIO\0\0\0c2p\0\0\0 fx-CP picture¶
Todo
Describe this.
Ly755 \x2C\0\x01\0\x01\0 fx-CG language file¶
Todo
Describe this.
USBPower\x12\0\x10\0\x10\0 fx-9860G language file¶
Todo
Describe this.
USBPower\x2C\0\x01\0\x01\0 fx-CG add-in¶
Todo
Describe this.
USBPower\x31\0\x10\0\x10\0 fx-9860G main memory archive¶
Such files contain files from the calculator’s main memory, including settings, programs, lists, pictures, captures, matrixes, and so on. This format is common to fx-9860G, fx-CP and fx-CG main memory archives.
Main memory files for these platforms have a group, a directory, a name and a numeric type. The archive organizes the main memory files per group, with a header per group followed by every file in the group with their own header.
The format of an example of such a file is the following:
Standard Header (32 B), referencing M + N objects
Group 1 Header (20 B), referencing M objects
File 1 Header (24 B)
File 1 Contents
File 2 Header (24 B)
File 2 Contents
…
File M Header (24 B)
File M Contents
Group 2 Header (20 B), referencing N objects
File M + 1 Header (24 B)
File M + 1 Contents
…
File M + N Header (24 B)
File M + N Contents
The number of main memory files is stored in the standard header, in the OC field.
Warning
Note that OC represents the number of main memory files, not the
number of groups, i.e. at least M + N in the !
The Group Header format is the following:
Offset |
Size |
Field name |
Description |
Values |
|---|---|---|---|---|
0 (0x00) |
16 B |
Group Name (GN) |
NUL-padded string, e.g. |
|
16 (0x10) |
4 B |
Group Count (GC) |
Number of files within the group. |
Big endian 32-bit integer. |
The File Header format is the following:
Offset |
Size |
Field name |
Description |
Values |
|---|---|---|---|---|
0 (0x00) |
8 B |
Directory Name (DN) |
NUL-padded string. |
|
8 (0x08) |
8 B |
File Name (FN) |
NUL-padded string. |
|
16 (0x10) |
1 B |
File Type (FT) |
8-bit integer. |
|
17 (0x11) |
4 B |
File Length (FL) |
Big endian 32-bit integer. |
|
21 (0x15) |
3 B |
Reserved |
Todo
Main memory file formats?
USBPower\x49\0\x10\0\x10\0 fx-9860G e-activity¶
Todo
Describe this.
USBPower\x62\0\x10\0\x10\0 fx-CP main memory archive¶
This format is equivalent to the equivalent format for the fx-9860G, but the signature and extension signify that the main memory files contained within may be specific to the fx-CP, or have been made on an fx-CP.
See USBPower\x31\0\x10\0\x10\0 fx-9860G main memory archive for more information.
USBPower\x75\0\x10\0\x10\0 fx-CG main memory archive¶
This format is equivalent to the equivalent format for the fx-9860G, but the signature and extension signify that the main memory files contained within may be specific to the fx-CG, or have been made on an fx-CG.
See USBPower\x31\0\x10\0\x10\0 fx-9860G main memory archive for more information.
USBPower\x7D\0\x10\0\x10\0 fx-CG picture¶
Todo
Describe this.
USBPower\xF3\0\x10\0\x10\0 fx-9860G add-in¶
Such files contain add-in, i.e. native programs to be run on the fx-9860G. They start with a 480-bytes long header formatted the following way:
Offset |
Size |
Field name |
Description |
Values |
|---|---|---|---|---|
0 (0x00) |
8 B |
Internal Name |
Internal name starting with |
Zero-padded string, e.g. |
8 (0x08) |
4 B |
E-Strip Count |
Big endian 32-bit integer. |
|
12 (0x0C) |
4 B |
Reserved |
Should be set to |
|
16 (0x10) |
12 B |
Add-In Version |
Version to be displayed under SYSTEM > VERSION. |
NUL-padded |
28 (0x1C) |
16 B |
Creation Date |
NUL-padded |
|
44 (0x2C) |
68 B |
Menu Icon |
Icon to be displayed in the main menu. |
Monochrome picture encoded using 1bpp monochrome picture format. |
112 (0x70) |
324 B |
Reserved |
Should be set to |
|
436 (0x1B4) |
8 B |
Add-In Title |
Title to be displayed under SYSTEM > VERSION. |
NUL-padded string. |
444 (0x1BC) |
20 B |
Reserved |
Should be set to |
|
464 (0x1D0) |
4 B |
File Size |
Size of the add-in contents following the header. |
Big endian 32-bit integer. |
468 (0x1D4) |
12 B |
Reserved |
Should be set to |
Todo
Describe this.
\xFF\xFF\xFF\xFF\xFF\xFF\xFF\xFF\xFF\xFF\xFF\xFF\xFF\xFF Undefined¶
Undefined extension; this needs to be determined using the extension.