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PSI BOX Reference
_______________________ _
Setting The IEEE Address.
DIP switches 1-4, on switch block 1, are used to set the
IEEE address of the PSI BOX. When the PSI BOX is acting as
an IEEE device, in modes 1 and 2, the address to which it
responds is determined by the front panel DIP switches. To an
IEEE controller the PSI BOX appears to be two separate
devices, one is an IEEE to RS232 interface, the other an IEEE
to Centronics Parallel interface. The data that the IEEE controller
sends goes to which ever port is being currently addressed. The
RS232 port is as set on the DIP switches, the Centronics port
address is one greater than this.
Figure 3-3. Setting The IEEE Address.
_________________________________
_____ _____ _____ _____
DIP 1 DIP 2 DIP 3 DIP 4
0=Off 0
0
1=On 0
0
0
1
0
1
1
0
0
0
1
1
0
1
0
1
1
1
1
1
0
0
0
1
0
0
0
1
0
1
1
0
0
0
1
1
0
1
0
1
1
1
1
1
_________________________
Setting The Controller State.
DIP switch 5, on switch block 1, is used to determine
whether the PSI BOX is the IEEE controller or not.
If the PSI BOX is the IEEE controller then you are wanting the
PSI BOX to convert an RS232 or Centronics signal to one
suitable to control some IEEE devices.
If the PSI BOX is not the IEEE controller then you are using an
IEEE computer, say a COMMODORE PET, and you are
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ADDRESSES SELECTED.
___________________
0
0 =RS232 PORT
0
1 =RS232 PORT
0
2 =RS232 PORT
0
3 =RS232 PORT
0
4 =RS232 PORT
0
5 =RS232 PORT
0
6 =RS232 PORT
0
7 =RS232 PORT
1
8 =RS232 PORT
1
9 =RS232 PORT
1
10 =RS232 PORT
1
11 =RS232 PORT
1
12 =RS232 PORT
1
13 =RS232 PORT
1
14 =RS232 PORT
1
15 =RS232 PORT
IEEE Port
1 =CENTRONICS PORT
2 =CENTRONICS PORT
3 =CENTRONICS PORT
4 =CENTRONICS PORT
5 =CENTRONICS PORT
6 =CENTRONICS PORT
7 =CENTRONICS PORT
8 =CENTRONICS PORT
9 =CENTRONICS PORT
10 =CENTRONICS PORT
11 =CENTRONICS PORT
12 =CENTRONICS PORT
13 =CENTRONICS PORT
14 =CENTRONICS PORT
15 =CENTRONICS PORT
16 =CENTRONICS PORT
Chapter 3
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