Service manual

Appendix
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3
EMM386.EXE and your CONFIG.SYS
Whichever DCB memory address is used, your CONFIG.SYS should be modified to exclude the
DCB Memory Mapped Address range from use by EMM386.EXE. The following line is normally
used:
DEVICE=C:\DOS\EMM386.EXE NOEMS X=D000-D7FF
Changing the BASE I/O ADDRESS
Switch S1-6 is used to control the BASE I/O ADDRESS. Either S1-6 or both S1-6 and S1-7 are
used, according to the DCB model:
Ver Base I/O Address
DCB1 S1-6
DCB2 S1-6
DCB3 S1-6 thru S1-7
Placing the switch (or switches) in the factory default position OFF position selects the FACTORY
DEFAULT I/O ADDRESS 100. Setting the switch (or switches to the ON position selects I/O
ADDRESSES 120, 140 or 160, according to the DCB model. When not in the factory default
position, the /B switch must be added to the driver load command. For example:
\LSDT\TOOLS\LSDTVxx /B120
How to set this switch to achieve the desired address for a DCB1 or DCB2:
BASE I/O
ADDRESS S1-6
100 OFF
120 ON
How to set this switch to achieve the desired address for a DCB3:
BASE I/O
ADDRESS S1-6 S1-7
100 OFF OFF
120 ON OFF
140 OFF ON
160 ON ON