Chapter 2 . System board features
ŸMicrophone for connecting a microphone.
Super input/output controller
Control oftheintegratedinput/output(I/O)and diskettedrivecontrollersisprovidedbya singlemodule. This module, whichsupportsPlug and Play,controlsthefollowingfeatures:
ŸDiskettedriveinterface
ŸSerial port
ŸParalle port
ŸKeyboardand mouse ports
Ÿ
Diskette | drive interface |
The PC 300PL | Personal Computer has fourdrivebaysforinstallinginternaldevices.The followingisa |
listofdevicesthatthediskettedrivesubsystemsupports:
Ÿ1.44MB,
Ÿ1.44MB,
Ÿ1.2MB,
Ÿ1 Mbps,
One connectorisprovidedon thesystemboardfordiskettedrivesupport. For informationon the connectorpin assignments, see“Diskettedriveconnector” page 31.
Seria l ports
Two universalasynchronousreceiver/transmitter(UART) serialportsareintegratedintothesystem board. The
rategenerators.The serialportsareNS16450 and PC16550A | compatible. |
For informationon theconnectorpin assignments, see“Serialportconnector” page 34.
Note : Current loop interfaceisnot supported.
The followingfigureshows theserialportassignments in theconfiguration.
Figure 4. | Serial port assignments |
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Port assignment |
| Address range (hex) | IRQ level |
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Serial1 |
| IRQ4 | |
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Serial2 |
| IRQ3 | |
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Serial3 |
| IRQ4 | |
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Serial4 |
| IRQ3 | |
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The defaultsettingfortheserialportisCOM1.
Paralle | l port |
Integratedin thesystemboardissupportforextendedcapabilitiesport(ECP), enhancedparallelport (EPP), and standardparallelport(SPP) modes . The modes ofoperationareselectedthroughthe Configuration/SetupUtilityprogram withthedefaultmode settoSPP . The ECP and EPP modes are compliant withIEEE 1284.
The followingfigureshows theparallelportassignments usedin theconfiguration.
10 TechnicalInformationManual