Compaq PORTABLE 386 - Chapter 9.6 Video Graphics Controller Board

Switch Function
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1 Reserved - Always OFF
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2 Serial Port Enable/Disable
2 = ON Enabled
2 = OFF Disabled
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3, 4 Parallel Port Select/Disable
3 = ON 4 = ON LPT1 Selected
3 = OFF 4 = ON LPT2 Selected
3 = ON 4 = OFF LPT3 Selected
3 = OFF 4 = OFF LPT Disabled
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5, 6 Serial Port Select
5 = ON 6 = ON COM1 Selected
5 = OFF 6 = ON COM2 Selected
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(Assy No. 000990)
Switch Function
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1 Reserved - Always OFF
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2 Reserved - Always OFF
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3, 4 Parallel Port Select/Disable
3 = ON 4 = ON LPT1 Selected
3 = OFF 4 = ON LPT2 Selected
3 = ON 4 = OFF LPT3 Selected
3 = OFF 4 = OFF LPT Disabled
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5, 6 Serial Port Select/Disable
5 = ON 6 = ON COM1 Selected
5 = OFF 6 = ON COM2 Selected
5 = OFF 6 = OFF Serial Port Disabled
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Chapter 9.6 Video Graphics Controller Board
Figures 9-5 and 9-6 show the Video Graphics Controller Boards and Table 9-16
lists approximate jumper settings.
Table 9-16. Video Graphics Controller Board Jumper Settings
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(Assy No. 109360)
Jumper Function
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J1 Video RAM
1-2 16 bit (default)
2-3 8 bit
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J2 Video ROM
2-3 8 bit (default)
1-216bit
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(Assy No. 000806)
Jumper Function