How a HP-IL peripheral signals "no more data"

[cgh]

So, I have tried with a HP82164A (I have no serial wire, so I cannot send/recv anything on the serial port), and the results are:

• On 41C, I did a INA; the SDA is answered by a EOT. The ALPHA register is cleared and the hand is back,
• On 71B/75C, I did a ENTER ':I1';S$; the SDA is answered by EOT, but the cycle continues indefinitelly: SDA EOT SDA EOT SDA EOT ... and I need to push the ATTN/ON button on the both computer to get the hand back.

This is funny to discover that Coconut does not have the same behavior than its big brothers