S2-9 - Touchpanel; S2-8 - Serial Channel Stop Bits Select; S2-7 - Forward/Reverse Channel; S2-6 - Serial Channel Parity Inhibit - Control Data Corporation INFORMATION SYSTEMS TERMINAL II Hardware Maintenance Manual

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S2-9 - Touchpanel
This switch should be set to the ON (closed) position if
the touchpanel is not present; or to the OFF (open) posi-
tion if the touchpanel is present.
S2-8 - Serial Channel Stop Bits Select
This switch selects the number of Stop bits to be trans-
mitted after the Parity bit (or following the last data bit
if parity is inhibited) on the serial channel interface.
This switch on (closed) selects 1 Stop bit. This switch
Off (open) selects 2 Stop bits when a 6-, 7-, or 8-bit word
length is selected or 1.5 Stop bits when a 5-bit word is
selected. The switch itself provides an input-high or
input-low to the serial channel interface and a load serial
control function must be executed in order for the serial
channel to accept this new mode.
S2-7 - Forward/Reverse Channel
This switch selects the RS-232-C channel through which the
terminal will transmit data to the central computer. In
the OFF (open) position, the forward or primary channel is
selected; in the ON (closed), position the reverse, low-
speed channel is selected.
NOTE
To select either the forward or
reverse channel, the S2-2 switch must
be in the OFF (RS-232-C enabled)
position.
Table 2-4 shows the outputs of the RS-232-C interface as
controlled by this switch.
S2-6 - Serial Channel parity Inhibit
This switch in the ON (closed) position, enables the inser-
tion of the parity bit on transmissions, and parity check-
ing on receptions of the serial channel interface. In .the
OFF (open) position, it disables the insertion and checking
of parity bits.
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