Diplomat jr Model jrN-ASV User Guide Issue No. 2 (03/01)
11
Configuration Bytes
The current generation of
Diplomat jrs grew from a generation that had
lots of configuration switches on the PCB to set up options. This required
taking the lid off the box to make changes and in addition the switches
occupied valuable PCB space that could be better utilised for extra
functionality. The jrN has non-volatile memory so it can remember any
configuration details that it is given. For simplicity we have introduced
the concept of ‘Silicon Switches’ to select low level options. They are
directly analogous to ordinary switches but only exist in the Diplomat’s
memory.
In the
Diplomat jrN there are four sets of Silicon Switches associated
with four Configuration Bytes.
Configuration Byte A controls the major characteristics of Port A and
Configuration Port B controls the major characteristics of Port B. Changing
Configuration Bytes C and D should only be attempted after careful con-
sideration of the consequences as once altered Port A will expect
data coming in to comply with the newly specified speed and character
format. Having said that Configuration Byte D used in conjunction with
Clock Links L4 and L5 can provide very versatile speed options includ-
ing split speed.
Selecting A, B, C or D from the Main Menu will cause the appropriate
Configuration Byte to be displayed and the cursor will be positioned un-
der the first bit. At this stage the following characters can be typed in to
change the configuration byte:
CR - Return to Main Menu with the value of the configuration byte set to
the displayed value.
Space - move cursor to the right without changing the byte.
BS - move the cursor to the left without changing the byte.
0 - Change the ‘Switch’ above the cursor to 0 and move cursor right.
1 - Change the ‘Switch’ above the cursor to 1 and move cursor right.
Note - if any operation moves the cursor off either end the system re-
turns to the Main Menu.
Because the configuration bytes set low level properties of the Diplomat
they should be set up prior to attempting to configure the Network pa-
rameters.
By convention the switches or bits of a configuration byte are num-
bered as follows
7
6
5
4
3
2
1
0
Configuration
