IBM 5150 PC Technical Reference (6025005, August, 1981) (PDF)

Setting The DIP Switches
There are two DIP switches on the control circuit board. In order to suit
the user's specific requirements, desired control modes are selectable
by the DIP switches. The functions of the switches and their preset
conditions at the time of shipment are as shown in Table 8 (DIP
Switch 1) and Table 9 (DIP Switch 2). ~.
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Figure 17. LOCATION OF PRINTER DIP SWITCHES
Table 8. Functions and Conditions of DIP Switch 1
2-72
Pin No. Function ON OFF Factory·set
Condition
1 Not applicable - - ON
2 CR { Print & Line Feed Print only Print & ON
Print only
line feed
3 Buffer full { Print & Line Feed Print only Print & ON
Print only
line feed
4 Cancel code {Valid Invalid Valid OFF
Invalid
5 Delete code { Valid Invalid Valid ON
Invalid
6 Error Buzzer Sounds Does not ON
sound
7 Character generator N.A. Graphic OFF
(Graphic pattern select)
patterns
select
8 SLCT I N signal Fixed Not fixed ON
Fixed internally
Not fixed internally