1
SECTION 1.
INSTALLATION
The MIL-188-C / MIL-188-114 adapter can be installed in any of the PC expansion slots
except J8 on the original IBM "XT" and Portable. Remove the PC case, remove the blank
metal slot cover, and insert the board. Replace the screw, replace the cover, and the
installation is complete.
Be Sure To Set The Address And Jumper Options Before Installation.
SECTION 2.
ADDRESS SELECTION
The serial port on the MIL-188 adapter occupies 8 consecutive I/O locations. Dip-switch SW1
sets the base address for the serial port. Be careful when selecting the base address as
some selections conflict with existing PC ports. The following table shows several examples
that usually do not cause a conflict.
ADDRESS
BINARY
SWITCH POSITION SETTING:
Hex
A9
A0
1
2
3
4
5
6
7
280-287
1010000XXX
OFF
ON
OFF
ON
ON
ON
ON
2A0-2A7
1010100XXX
OFF
ON
OFF
ON
OFF
ON
ON
2E8-2EF
1011101XXX
OFF
ON
OFF
OFF
OFF
ON
OFF
2F8-2FF
1011111XXX
OFF
ON
OFF
OFF
OFF
OFF
OFF
3E8-3EF
1111101XXX
OFF
OFF
OFF
OFF
OFF
ON
OFF
300-307
1100000XXX
OFF
OFF
ON
ON
ON
ON
ON
328-32F
1100101XXX
OFF
OFF
ON
ON
OFF
ON
OFF
3F8-3FF
1111111XXX
OFF
OFF
OFF
OFF
OFF
OFF
OFF
TYPICALLY COM1: = 3F8h; COM2: = 2F8h; COM3: = 3E8h; COM4: = 2E8h.
FIGURE 1
ADDRESS SELECTION TABLE
The following illustration shows the correlation between the dip-switch setting and the address
bits used to determine the base address. In the example below, the address 300 Hex through
307 Hex is selected. 300 Hex =11 0000 0XXX In binary representation.
FIGURE 2
DIP-SWITCH ILLUSTRATION
NOTE: Setting the switch "On" or "Closed" corresponds to a "0" in the address, while leaving
it "Off" or "Open" corresponds to a "1".
