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-------------------------------------------------------------------------------
Serial GPIB (IEC Bus)
-------------------------------------------------------------------------------
This is an example capture of some IEC Bus traffic on a CBM 1571 floppy disk
drive.
Details:
https://en.wikipedia.org/wiki/Commodore_bus
Logic analyzer setup
--------------------
The logic analyzer used was a genuine Saleae Logic16 (at 1 MHz):
Probe IEC
---------------
0 SRQ
1 -
2 ATN
3 CLK
4 DATA
5 RESET
Data
----
The following is happening on the IEC bus in this capture:
- Controller sets device with GPIB address number 8 to TALK
- Controller reopens channel 15
- Device with GPIB address number 8 sends a status string to controller
- Controller sets the GPIB to UNTALK
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