TI-86 Link Protocol Guide v1.0 - Remote control/command

The TI-86's remote control ability is "silent," which means that the calculator does not need to be put in a special mode. The remote control ability can be utilized any time the calculator is ready to accept a keypress. Key codes : here.

Remote command:

The protocol used for sending a remote command is shown below.

Step	Direction			Packet
1				CMD
2				ACK
3				Second ACK or SKIP/EXIT with 1-byte error code. If SKIP/EXIT, then the computer sends an ACK packet back to the calculator. (fixme !)

The scancode of the key is sent in the last two bytes of the command. The <2nd> and <Alpha> keys are not sent as scancodes, but are implied by the scancode of the following key.

Example:

PC:	06 87 C7 00	Command: Key <M1> (<2nd>+<F1>)
TI:	86 56 00 00	Acknowledgement of command
TI:	86 56 00 00	Acknowledgement (fixme !)

The computer will not send any information back through the link port except the error state when an error screen is loaded.
 

Packet Formats

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Screenshots