Black Box Computer Hardware IC181C 用户手册
9
Set jumper to “S” if you are using more than one Four Port RS-232 Serial
Interface in a bus or you wish to remove the pull-down resistor completely
for hardware compatibility.
Interface in a bus or you wish to remove the pull-down resistor completely
for hardware compatibility.
NOTE
Setting the board in this configuration when it is not accompanied by a
pull-down resistor will prevent the ports from triggering an interrupt. The
factory default for this board is COM1: and COM3: sharing IRQ4, and
COM2: and COM4: sharing IRQ3.
pull-down resistor will prevent the ports from triggering an interrupt. The
factory default for this board is COM1: and COM3: sharing IRQ4, and
COM2: and COM4: sharing IRQ3.
Figure 4- 4. E5, sharing multiple serial interface cards.
1 2
3 4
M
S
N
M
S
N
CHAPTER 4: Option Selection