XDIAG command notes

The ++xdiag command can be used to test that individual lines are being asserted / unasserted. The command takes two parameters: mode and value.

To manipulate control lines use mode 1, and for data lines use mode 0.

To assert a line/data bit, simply speciy one of the values in the table below.

To assert multiple lines/bits simultaneously, simply add the values.

To un-assert a line, subtract its value from 255 The following two tables list the GPIB signals and the command used to assert them.

Command signals:

Assert IFC:++xdiag 1 1 Assert NDAC:++xdiag 1 2 Assert NRFD:++xdiag 1 4 Assert DAV:++xdiag 1 8 Assert EOI:++xdiag 1 16 Assert REN:++xdiag 1 32 Assert SRQ:++xdiag 1 64 Assert ATN:++xdiag 1 128 Assert ALL:++xdiag 1 255 Un-assert ALL:++xdiag 1 0

Data bits:

Assert DA01:++xdiag 0 1 Assert DA02:++xdiag 0 2 Assert DA03:++xdiag 0 4 Assert DA04:++xdiag 0 8 Assert DA05:++xdiag 0 16 Assert DA06:++xdiag 0 32 Assert DA07:++xdiag 0 64 Assert DA08:++xdiag 0 128 Assert ALL:++xdiag 0 255 Un-assert ALL:++xdiag 0 0