TI-89 Link Protocol Guide - Getting OS & BIOS version

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OS & BIOS version

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

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#### Getting OS & BIOS version

Indeed, the request is like sending a TI84+ FLASH.

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: | `08 2D 00 00` | Request informations
TI: | `98 56 00 00` | Acknowledgement of REQ
PC: | `08 09 00 00` | Clear to send variable
TI: | `98 56 00 00` | Acknowledgement of CTS
| `88 15 0E 00 02 09 01 07 00 01 09 01 00 00 00 00 00 03 21 00` | Variable data: 14 bytes (OS: 2.09, BIOS: 1.07)
PC: | `08 56 00 00` | Acknowledgement of variable data

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

Offset | Length | Description
--- | --- | ---
0 | 2 bytes | OS version like 02 09 for 2.09
4 | 2 bytes | BIOS version like 01 07 for 1.07
6 | 1 byte | Battery level: 00 = good, 01 = low
7 | 1 byte | Hardware Revision ? (0 = HW1, 1 = HW2, 2 = HW3)
8 | 2 bytes | Language ID ( 0x0901 for English)
10 | 2 bytes | Always 00 00
12 | 2 bytes | Always 00 00
14 | 2 bytes | Hardware ID (1 = 92+, 3 = 89, 8 = V200, 9 = Titanium); see TIGCC doc.

Examples :
TI89 HW1 : 02 09 01 00 00 00 09 01 00 00 00 00 00 03
TI89 HW2 : 02 09 01 00 00 01 09 01 00 00 00 00 00 03
TI92+ HW1 : 02 09 01 00 00 00 09 01 00 00 00 00 00 01
TI92+ HW2 : 02 09 01 01 00 01 09 01 00 00 00 00 00 01
V200 : 02 09 01 02 00 02 09 01 00 00 00 00 00 08
89T : 03 01 01 03 00 02 09 01 00 00 00 00 00 09

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