Data Parameter Data - Casio PX-110 Function Manual

In this case, "index" is a 3-byte fixed field. When transferring one parameter set, it indicates the divided packet
serial number (starting with 00) and the size of the "data" field that immediately follows this field.
i[0]...0nnnnnnnB Packet Number LSB (NNNNNNNnnnnnnnB = Packet Number)
i[1]...0NNNNNNNB Packet Number MSB
As explained in the data field section, 128 bytes can be sent per packet, so received data can be stored at
[Parameter Set start address] + [Packet Number] × 128.
i[2]...0LLLLLLLB data length / 3
The data length is the data length indicated here, multiplied by 3. This means that the data length is always a
multiple of 3.
When act = 03(BDR) or 05(HDR)
Format: -
This field is always empty.
When act = 7 (EOD, HDA, HDJ, HDE, BSY, EOS, NOP)
Format: 0000ccccB
In this case, the "index" field length is fixed at 1 byte, and it indicates the control messages used for handshaking
as shown below. See "17 Parameter Set Transfer Modes" for more information.
ccccB Control Message
0000B EOD Oneway/Handshake Bulk Dump End of Data (End of Parameter Set Transfer)
0001B HDA Handshake Bulk Dump Acknowledge (Handshake Receive Successful)
0010B HDJ Handshake Bulk Dump Reject (Handshake Rejected/Stopped)
0011B HDE Handshake Bulk Dump Error (Handshake Error)
0100B BSY Handshake Bulk Dump Busy (Handshake Busy)
0101B EOS Oneway/Handshake Bulk Dump End of Package (End of Parameter Set Package Transfer)
:
1111B NOP No Operation (No Operation)
15.2.11

11...data Parameter Data

When act = 1(IPR), 03(BDR), 05(HDR) or 7 (EOD, HDA, HDJ, HDE, BSY, EOS, NOP)
Format: -
This field is always empty.
When act = 00(IPC)
Format: 0dddddddB (0eeeeeeeB) (0fffffffB)
32
(0gggggggB) (0hhhhhhhB)