IBM PC 300PL manual Super input/output controller, Diskette Drive interface, Seria l ports, Port

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

ŸGeneral-purposeI/Oports

Diskette	drive interface
The PC 300PL	Personal Computer has fourdrivebaysforinstallinginternaldevices.The followingisa

listofdevicesthatthediskettedrivesubsystemsupports:

Ÿ1.44MB, 3.5-inchdiskettedrive

Ÿ1.44MB, 3.5-inch,3-mode driveforJapan(no BIOS supportfor3-mode drive)

Ÿ1.2MB, 5.25-inch diskettedrive

Ÿ1 Mbps, 500-Kbps, or 250 Kbps internaltapedrive

One connectorisprovidedon thesystemboardfordiskettedrivesupport. For informationon the connectorpin assignments, see“Diskettedriveconnector” page 31.

Seria l ports

Two universalasynchronousreceiver/transmitter(UART) serialportsareintegratedintothesystem board. The serialportsinclude16-bytedata,first-firstin-out(FIFO)buffersand have programmable baud

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
Port assignment		Address range (hex)	IRQ level
Serial1		03F8–03FF	IRQ4
Serial2		02F8–02FF	IRQ3
Serial3		03E8–03FF	IRQ4
Serial4		02E8–02FF	IRQ3

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 ￿