Compaq Portable II - Serial;Parallel Interface Board Switch Settings

Chapter 8.8 Serial/Parallel Interface Board Switch Settings
Figures 8-17 and 8-18 show the switch locations on the Serial/Parallel
Interface Board. Refer to Tables 8-12 and 8-13 when setting the switches.
Table 8-12. Serial/Parallel Interface Board Switch Settings (Assy No. 000570)
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123456 Function
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OFF Reserved
ON Enable asynchronous interface
OFF Disable asynchronous interface
ON ON Parallel printer interface LPT1
OFF ON Parallel printer interface LPT2
ON OFF Parallel printer interface LPT3
OFF OFF Disable parallel printer interface
ON ON Asynchronous interface COM1
OFF ON Asynchronous interface COM2
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Table 8-13. Serial/Parallel Interface Board Switch Settings (Assy No. 000990)
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123456Function
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OFF Reserved
OFF Reserved
ON ON Parallel printer interface LPT1