With the introduction of the Ti-Connect software, Texas Instruments have incorporated a new command which returns some version informations.

Getting OS & BIOS version

The protocol for silently receiving the clock is shown below:

Step	Direction			Packet
1				VER
2				ACK
3				CTS
4				ACK
5				DATA
6				ACK

Example (PC requesting version):

PC:	07 2D 00 00	Request informations
TI:	74 56 00 00	Acknowledgement of REQ
PC:	07 09 00 00	Clear to send variable
TI:	74 56 00 00	Acknowledgement of CTS
	74 15 0B 00 01 60 01 00 00 00 09 01 42 52 00 01 00	Variable data: 12 bytes (OS: 1.60, BIOS: 1.00)
PC:	07 56 00 00	Acknowledgement of variable data

The variable data has the following format (pure binary and/or BCD):

Offset	Length	Description
0	2 bytes	OS version like 01 60 for 1.60
4	2 bytes	BIOS version like 01 00 for 1.00
6	1 byte	Battery level (00 = good, 01 = low)
7	1 byte	??
8	2 bytes	Always 09 01
10	2 bytes	??
12	1 byte	Always 00

Note : when calculator is waiting for OS arrival, any packet is rejected unless this one. But, it returns 0.00 as OS version.
Note : this packet seems to the same as TI8X+ hand-helds.

Flash Transfers

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