TI-85 Link Protocol Guide v1.0 - Manual Variable Transfers

The TI-85 uses manual transfer protocols when it is in Link mode. On the sending unit a user must choose the variables to be sent, and the receiving calculator must be put into a special reception mode.

The protocol for all manual variable transfers is shown below. For information on packet formats, click here.

A computer can be either the sending unit or the receiving unit.

Step	Direction			Packet
1				VAR
2				ACK
3				CTS or SKIP/EXIT. Do step 4 (send the ACK). Then if skip, skip to step 7, or if exit then stop.
4				ACK
5				DATA
6				ACK
7				EOT or another VAR. If var, go to step 2.
8				ACK

The data packet contains the variable data. For information on variable formats, click here.

Example (PC sending variables to TI):

PC:	05 06 05 00 0A 00 00 01 41 4C 00	Variable Header: Real Number "A"
TI:	85 56 05 00	Acknowledgement of header
	85 09 05 00	Clear to send variable
PC:	05 56 00 00	Acknowledgement of CTS
	05 15 0A 00 00 00 FC 62 83 18 53 07 18 00 5B 02	Variable data: "6.28318530718"
TI:	85 56 0A 00	Acknowledgement of data
PC:	05 06 05 00 0A 00 00 01 42 4D 00	Variable Header: Real Number "B"
TI:	85 56 00 00	Acknowledgement of header
	85 36 01 00 02 02 00	Skip variable
PC:	05 56 00 00	Acknowledgement of variable skip
	05 92 00 00	No more variables
TI:	85 56 00 00	Acknowledgement of EOT

Screenshots

Table of Contents

Silent Transfers