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CAS100 data types

Todo

Write this!

The format of such headers is the following:

Offset	Size	Field name	Description	Values
0 (0x00)	4 B	Type (T)	Basic content of the packet	MDL1
4 (0x04)	34 B	Type-specific data	Data for which the format is specific to the type.	See the type description for the format of this component. If the type-specific data is less than 34 bytes, the rest is filled with \xFF.
38 (0x26)	1 B	Checksum (CS)	Checksum for the packet.

ADN1 headers

These packets seem to be used to send data.

Offset	Size	Field name	Description	Values
0 (0x00)	4 B	Data Type (DT)		INF1 (System), FR00 (Segment), MSG1 (Language)
4 (0x04)	4 B	?		Integer (little endian), e.g. 0x40000 (256 * 1024)
8 (0x08)	4 B	?		Integer (little endian), e.g. 0x80000000
12 (0x0C)	4 B	?		Integer (little endian), e.g. 0x200 (512).

ADN2 headers

Unknown purpose.

Offset	Size	Field name	Description	Values
0 (0x00)	4 B	Data Type (DT)		INF1 (System), FR00 (Segment), MSG1 (Language)
4 (0x04)	4 B	?		Integer (little endian), e.g. 0x00000000 (0).
8 (0x08)	4 B	?		Integer (little endian), e.g. 0x100 (256).

BKU1 headers

Unknown purpose.

Offset	Size	Field name	Description	Values
0 (0x00)	4 B	Data Type (DT)		RAMS, RAMI, RAM1
4 (0x04)	4 B	?		Big endian 32-bit integer, e.g. 0xE000.

END1 headers

These packets are sent at the end of the communication.

They do not use additional data.

FCL1 headers

Unknown purpose.

Offset	Size	Field name	Description	Values
0 (0x00)	4 B	Data Type (DT)		S000

FMV1 headers

Unknown purpose.

Offset	Size	Field name	Description	Values
0 (0x00)	4 B	Data Type (DT)		FR00
4 (0x04)	8 B	Data Type 2 (DT2)		FR00 (sic.)

MCS1 headers

These packets contain main memory data.

Offset	Size	Field name	Description	Values
0 (0x00)	3 B	Reserved		Set to \0.
3 (0x03)	2 B	File size		Big-endian 16-bit integer (?).
5 (0x05)	1 B	Data type		8-bit integer, among the following: Data type Description 0x01 Program
6 (0x06)	8 B	Data name		0xFF optionally terminated string.
14 (0x0E)	8 B	Group name		0xFF optionally terminated string.

MDL1 headers

These packets contain initialization data for the CAS100 variant of the CASIOLINK protocol, with calculator model information.

Offset	Size	Field name	Description	Values
0 (0x00)	6 B	Model Identification (M)		ZX945\0
6 (0x06)	6 B	Baud speed (BS)	?	ASCII-DEC, e.g. 038400
12 (0x0C)	1 B	Parity (PAR)	?	N, E or O
13 (0x0D)	4 B	OS Version (VER)		1.00
17 (0x11)	4 B	Flash ROM capacity		Little endian 32-bit integer, e.g. 0x100000 (1048576, 1 MiB).
21 (0x15)	4 B	RAM capacity		Little endian 32-bit integer, e.g. 0x40000 (262144, 256 KiB).
25 (0x19)	4 B	Unknown		Little endian 32-bit integer, e.g. 0x10000 (65536, 64 KiB).
29 (0x1D)	4 B	Unknown		4-char string, e.g. "0x07" (0x30, 0x78, 0x30, 0x37).

REQ1 headers

These packets seem to be used to request information.

Offset	Size	Field name	Description	Values
0 (0x00)	4 B	Data Type (DT)		INF1 (System), FR00 (Segment), MSG1 (Language)

REQ2 headers

Unknown purpose.

Offset	Size	Field name	Description	Values
0 (0x00)	4 B	Data Type (DT)		INF1 (System), FR00-FR09 (Segment), MSG1 (Language), MR04 (?)
4 (0x04)	4 B	?		Integer (little endian), e.g. 0.
8 (0x08)	4 B	?		Integer (little endian), e.g. 0x20000000 (512 * 1024 * 1024)

SET1 headers

Unknown purpose.

Offset	Size	Field name	Description	Values
0 (0x00)	2 B	?		\x30\x01
2 (0x02)	8 B	?		0xFF optionally terminated string, e.g. Y=Data.