English dropdown-ico

Intel MB865 manual

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64

Go to page of

Similar user manuals

A good user manual

The rules should oblige the seller to give the purchaser an operating instrucion of Intel MB865, along with an item. The lack of an instruction or false information given to customer shall constitute grounds to apply for a complaint because of nonconformity of goods with the contract. In accordance with the law, a customer can receive an instruction in non-paper form; lately graphic and electronic forms of the manuals, as well as instructional videos have been majorly used. A necessary precondition for this is the unmistakable, legible character of an instruction.

What is an instruction?

The term originates from the Latin word „instructio”, which means organizing. Therefore, in an instruction of Intel MB865 one could find a process description. An instruction's purpose is to teach, to ease the start-up and an item's use or performance of certain activities. An instruction is a compilation of information about an item/a service, it is a clue.

Unfortunately, only a few customers devote their time to read an instruction of Intel MB865. A good user manual introduces us to a number of additional functionalities of the purchased item, and also helps us to avoid the formation of most of the defects.

What should a perfect user manual contain?

First and foremost, an user manual of Intel MB865 should contain:
- informations concerning technical data of Intel MB865
- name of the manufacturer and a year of construction of the Intel MB865 item
- rules of operation, control and maintenance of the Intel MB865 item
- safety signs and mark certificates which confirm compatibility with appropriate standards

Why don't we read the manuals?

Usually it results from the lack of time and certainty about functionalities of purchased items. Unfortunately, networking and start-up of Intel MB865 alone are not enough. An instruction contains a number of clues concerning respective functionalities, safety rules, maintenance methods (what means should be used), eventual defects of Intel MB865, and methods of problem resolution. Eventually, when one still can't find the answer to his problems, he will be directed to the Intel service. Lately animated manuals and instructional videos are quite popular among customers. These kinds of user manuals are effective; they assure that a customer will familiarize himself with the whole material, and won't skip complicated, technical information of Intel MB865.

Why one should read the manuals?

It is mostly in the manuals where we will find the details concerning construction and possibility of the Intel MB865 item, and its use of respective accessory, as well as information concerning all the functions and facilities.

After a successful purchase of an item one should find a moment and get to know with every part of an instruction. Currently the manuals are carefully prearranged and translated, so they could be fully understood by its users. The manuals will serve as an informational aid.

Table of contents for the manual

  • Page 1

    MB865 LGA775 Pentium 4 Intel 865G Industrial Motherboard USER’S MANUAL Version 1.0[...]

  • Page 2

    ii MB865 User’s Manual Acknowledgments Award is a registered trademark of Award Software International, Inc. PS/2 is a trademark of International Business Machines Corporation. Intel and Pentium 4 are registered trademarks of Intel Corporation. Microsoft Windows is a registered trademark of Microsoft Corporation. Winbond is a registered trademark[...]

  • Page 3

    MB865 User’s Manual iii Table of Contents Introduction ....................................................... 1 Product Description ............................................................. 1 Checklist .............................................................................. 2 Specifications .............................................[...]

  • Page 4

    iv MB865 User’s Manual This page is intention ally left blank.[...]

  • Page 5

    INTRODUCTION MB865 User’s Manual 1 Introduction Product Description The world's first Pent ium 4 LGA775 indust rial mot herboard based on the Intel® 865G chipset, M B865, supports processor FSB of 533/800MHz for processor speeds of up t o 3.8GHz. With two DDR mem ory socket on board, the motherboard accomm odates a maxim um memory capacity [...]

  • Page 6

    INTRODUCTION 2 MB865 User’s Manual Checklist Your MB865 package should include the i tems li sted below. • The MB865 Industrial motherboard • This User’s Manual • 1 IDE Ribbon Cable • 1 Bracket for 1 Serial Port • 1 Bracket for 2 Serial Ports • 1 SATA Cable • I/O Shield Plate • 1 CD containing the foll owing: • Chipset Drivers[...]

  • Page 7

    INTRODUCTION MB865 User’s Manual 3 Specifications Form Factor ATX CPU Type LGA 775 (Intel® Pentium® 4 / Celeron D) System Speed 2.53GHz~3.8GHz CPU Operating Frequency 533MHz / 800MHz Green /APM APM1.2 CPU Socket LGA775 Chipset Intel® 865G / 865GV Chipset GMCH: 82865G 932-pin FC-BGA ICH5: 82801EB 460-pin MBGA FWH BIOS Award BIOS; Support ACPI f[...]

  • Page 8

    INTRODUCTION Board Dimensions 4 MB865 User’s Manual[...]

  • Page 9

    INSTALLATIONS MB865 User’s Manual 5 Installations This section provides inform ation on how to use the jum pers and connectors on the M B865 in order to set up a workable system . The topics covered are: Installing the CPU ........................................................................ 6 ATX Power Installation ...........................[...]

  • Page 10

    INSTALLATIONS Installing the CPU The MB865 motherboard support s a LGA 775 processor socket for Intel® Pentium® 4 processors. The LGA 775 processor socket comes with a l ever to secure the processor. Refer to the pictures belo w, from left to right, on how to place the processor into the CPU socket. Please note that the cover of the LGA775 socket[...]

  • Page 11

    INSTALLATIONS Installing the Memory The MB865 motherboard supports two DDR mem ory sockets for a maxi mum t ota l memo ry of 2G B in DD R me mor y ty pe . T he memo ry module capacities supported are 64MB, 128MB, 256MB, 512MB and 1GB. The following table l ists the supported DDR DIMM configurations. Intel 865G supports configurations defined in the[...]

  • Page 12

    INSTALLATIONS 8 MB865 User’s Manual Setting the Jumpers Jumpers are used on MB865 to select various settings and features according to your needs and applica tions. Contact your supplier if you have doubts about the best configurati on for your needs. The following lists the connectors on MB 865 and their respective functions. Jumper Locations on[...]

  • Page 13

    INSTALLATIONS Jumper Locations on MB865 Jumpers on MB865 ................................................................... Page JP1, JP2, JP3: RS232/422/ 485 (COM2) Selection ....................... 10 JP4: Clear CMOS Contents .......................................................... 10 JP5: 10/100Mb LAN Enable/Disable ..........................[...]

  • Page 14

    INSTALLATIONS Configuring the CPU Frequency The MB865 motherboard does not provide DIP switches to configure the processor speed (CPU frequency). The CPU frequency and processor side bus of the processor can be automatically detected by the motherboard. JP1, JP2, JP3: RS232/ 422/485 (COM2) Selection COM1 is fixed for RS-232 use only. COM2 is select[...]

  • Page 15

    INSTALLATIONS JP5: 10/100Mb LAN Enable/Disable If your motherboard comes with the Gigab it LAN functionality, yo u can use this jumper to enable or d isable it. JP5 Setting Function Pin 1-2 Short/Closed Enable Pin 2-3 Short/Closed Disable MB865 User’s Manual 11[...]

  • Page 16

    INSTALLATIONS 12 MB865 User’s Manual Connectors on MB865 The connectors on MB865 allows you t o connect external devices such as keyboard, floppy disk drives, hard disk drives, printers, etc. The following table li sts the connectors on MB865 and their respective functions. Connector Locations on MB865 ............................................[...]

  • Page 17

    INSTALLATIONS Connector Locations on MB865 Connectors on MB865 ................................................................................................... Page ATX1: ATX Power Suppl y Connect or........................................................................................ 14 FDD1: Floppy Driv e Connect or .........................[...]

  • Page 18

    INSTALLATIONS ATX1: ATX Pow er Supply Connector Signal Name Pin # Pin # Signal Name 3.3V 13 1 3.3V -12V 14 2 3.3V Ground 15 3 Ground PS-ON 16 4 +5V Ground 17 5 Ground Ground 18 6 +5V Ground 19 7 Ground -5V 20 8 Power good +5V 21 9 5VSB +5V 22 10 +12V +5V 23 11 +12V Ground 24 12 +3.3V FDD1: Floppy Driv e Connector FDD1is a slim 26-pin connector and [...]

  • Page 19

    INSTALLATIONS IDE1, IDE2: EIDE Connectors IDE1: Primary IDE Connector Signal Name Pin # Pin # Signal Name Reset IDE 1 2 Ground Host data 7 3 4 Host data 8 Host data 6 5 6 Host data 9 Host data 5 7 8 Host data 10 Host data 4 9 10 Host data 11 Host data 3 11 12 Host data 12 Host data 2 13 14 Host data 13 Host data 1 15 16 Host data 14 Host data 0 17 [...]

  • Page 20

    INSTALLATIONS FAN1: CPU Fan Pow er Connector Pin # Signal Name 1 Ground 2 +12V 3 Rotation detection 4 NC FAN2: Chassis Fan Pow er Connector FAN2 is a 3-pin header for the chassis fan. The fan m ust be a 12V fan. Pin # Signal Name 1 Ground 2 +12V 3 Rotation detection FAN3: System Fan Power Connector FAN3 is a 3-pin header for a 12V fan. Pin # Signal[...]

  • Page 21

    INSTALLATIONS CN2, J1, J10, J13: Serial Ports CN2 (COM1) is a DB-9 connect or, while J1 (COM2), J10 (COM3) and J13 (COM4) are pin headers. COM1 COM2/COM3/COM4 Signal Name Pin # Pin # Signal Name DCD, Data carrier detect 1 6 DSR, Data set ready RXD, Receive data 2 7 RTS, Request to send TXD, Transmit data 3 8 CTS, Clear t o send DTR, Data termi nal [...]

  • Page 22

    INSTALLATIONS CN3: Parallel Port Connector CN3 is a DB-25 external. The followi ng table describes the pin-out assignments of t his connector. Signal Name Pin # Pin # Signal Name Line printer strobe 1 14 AutoFeed PD0, parallel data 0 2 15 Error PD1, parallel data 1 3 16 Initialize PD2, parallel data 2 4 17 Select PD3, parallel data 3 5 18 Ground PD[...]

  • Page 23

    INSTALLATIONS CN5: USB and 10/100Mb LAN RJ45 Connectors CN5 consists of an 10/100 RJ-45 connector (t op) and two stacked USB ports. Refer to the section b elow for their respective pin assig nments. Pin # Signal Name 1 Vcc 2 USB- 3 USB+ USB0 USB1 4 Ground CN6: USB and Gigabit LAN RJ45 Connectors CN6 consists of a Gigabit RJ-45 connect or (top) and [...]

  • Page 24

    INSTALLATIONS J2: Digital 4-in 4-out I/O Connector Signal Name Pin Pin Signal Name Ground 1 2 Vcc Out3 3 4 Out1 Out2 5 6 Out0 IN3 7 8 IN1 IN2 9 10 IN0 J4: IrDA Connector Pin # Signal Name 1 +5V 2 No connect 3 Ir RX 4 Ground 5 Ir TX J5: ATX 12V Pow er Connector Pin # Signal Name 1 Ground 2 Ground 3 +12V 4 +12V J6: Compact Flash Connector J7, J8: Ser[...]

  • Page 25

    INSTALLATIONS J9: CD-In Audio Connector Pin # Signal Name 1 CD Audio L 2 Ground 3 Ground 4 CD Audio R J11: External Audio Connector J11 is a 6-pin header that is used t o connect to the optional audio cable card that integrates jacks for Line Out and Mic. Signal Name Pin # Pin # Signal Name LINEOUT_L 1 2 LINEOUT_R Ground 3 4 Ground MIC 1 5 6 MIC 2 [...]

  • Page 26

    INSTALLATIONS J15: System Function Connector J15 provides connectors for system indicators that provide l ight indication of th e computer activities and switches to ch ange the computer status. Hard Disk Drive LED Reset Switch Not Defined ATX Power On Switch SMI / Hardware Switch Power LED Speaker Speaker: Pins 1 - 4 This connector provides an int[...]

  • Page 27

    INSTALLATIONS SMI/Hardware Switch: Pins 6 and 16 This connector supports the "Green Switch" on the control panel, which, w hen pressed, w ill force the system into the power-saving mode im mediat ely. Pin # Signal Name 6 SMI 16 Ground ATX Power ON Switch: Pins 7 and 17 This 2-pin connector is an “ATX Power Suppl y On/Off Switch” on th[...]

  • Page 28

    INSTALLATIONS 24 MB865 User’s Manual Watchdog Timer Configuration The WDT is used to generate a variety of output si gnals after a user programma ble count. The WDT is suitable for use in the preventi on of system lock-up, such as when soft ware becom es trapped in a deadlock. Under these sort of circumstances, the tim er will count to zero and t[...]

  • Page 29

    INSTALLATIONS MB865 User’s Manual 25 mov al, 01h mov cl, 30h call Write_Reg ;watchdog enabled call Lock_Chip r e t Enable_And_Set_Watchdog Endp ;[]=============================================== ; Name : Disable_Watchdog ; IN : None ; OUT : None ;[]=============================================== Disable_Watchdog Proc Near call Unlock_Chip mov cl,[...]

  • Page 30

    INSTALLATIONS 26 MB865 User’s Manual ;[]================================================ Unlock_Chip Proc Near mov dx, 2Eh mov al, 0AAh out dx, al r e t Unlock_Chip Endp ;[]================================================ ; Name : Write_Reg ; IN : CL - register index ; AL - Value to write ; OUT : None ;[]==========================================[...]

  • Page 31

    BIOS SETUP MB865 User’s Manual 27 BIOS Setup This chapter describes the d ifferent settings available in the Award BIOS that comes with the motherboard . The topics covered in this chapter are as follows: BIOS Introduction ................................................................................ 28 BIOS Introduction .......................[...]

  • Page 32

    BIOS SETUP 28 MB865 User’s Manual BIOS Introduction This chapter describes the d ifferent settings available in the Award BIOS that comes with the board. The topics covered in this chapter are as follows: BIOS Introduction ..................................................................... 29 BIOS Setup .........................................[...]

  • Page 33

    BIOS SETUP MB865 User’s Manual 29 BIOS Introduction The Award BIOS (Basic Input/Output System ) installed i n your computer system ’s ROM supports Intel ® Pentium ® 4 processors. The BIOS provides criti cal low-level support for a standard device such as disk drives, serial ports and paral lel ports. It also adds virus and password protection[...]

  • Page 34

    BIOS SETUP 30 MB865 User’s Manual Phoenix - AwardBIOS CMOS Setup Utility Standard CMOS Features Frequency/Voltage Control Advanced BIOS Features Load Fail-Safe Defaults Advanced Chipset Features Load Optimized Defaults Integrated Peripherals Set Supervisor Password Power Management Setup Set User Passw ord PnP/PCI Configurations Save & Exit S[...]

  • Page 35

    BIOS SETUP MB865 User’s Manual 31 Standard CMOS Setup “Standard CMOS Setup” choice all ows you to record some basic hardware configurations in your com puter system and set the system clock and error handling. If the board is al ready installed in a worki ng system, you will not need to select this o ption. You w ill need to run the Standard [...]

  • Page 36

    BIOS SETUP 32 MB865 User’s Manual Time The time format is: Hour : 00 to 23 Minute : 00 to 59 Second : 00 to 59 To set the tim e, highlight the “Time” fiel d and use the <PgUp>/ <PgDn> or +/- keys to set the curren t time. IDE Primary HDDs / IDE Secondary HDDs The onboard PCI IDE connectors provide Primary and Secondary channels fo[...]

  • Page 37

    BIOS SETUP MB865 User’s Manual 33 Video This field selects the type of video di splay card instal led i n your syst em . You can choose the following video displ ay cards: EGA/VGA For EGA, VGA, SEGA, SVGA or PGA monitor adapters. (default) CGA 40 Power up in 40 column m ode. CGA 80 Power up in 80 column m ode. MONO For Hercules or MDA adapters. H[...]

  • Page 38

    BIOS SETUP 34 MB865 User’s Manual Advanced BIOS Features This section allows you to configure and im prove your system and allows you to set up some system f eatures according to your preference. Phoenix - AwardBIOS CMOS Setup Utility Advanced BIOS Features CPU Feature Hard Disk Boot Priority Press Enter Press Enter ITEM HELP Virus W arning Disab[...]

  • Page 39

    BIOS SETUP MB865 User’s Manual 35 Hard Disk Boot Priority This ite m all ows you to set t he priority for hard disk boot . When you press enter, the select ions shows the current hard disks used in your system as well as the “ Bootable Add-in Card ” that is relevant to other boot sources media such as SCSI cards and LAN cards. Virus Warning T[...]

  • Page 40

    BIOS SETUP 36 MB865 User’s Manual Sw ap Floppy Drive This item allows you to determi ne whether or not to enable Swap Floppy Drive. When enabled, the BIOS swaps floppy drive assignments so that Drive A becomes Drive B, and Drive B becomes Drive A. By default, this field is set to Disabled. Boot Up Floppy Seek This feature controls whether t he BI[...]

  • Page 41

    BIOS SETUP MB865 User’s Manual 37 MPS Version Control for OS This option is specifies th e MPS (Multiprocessor Specification ) version for your operating system . MPS version 1.4 added extended configuration tables to impr ove support for m ultiple PCI bus configuratio n s and improve future ex p andability. The default settin g is 1.4 . OS Selec[...]

  • Page 42

    BIOS SETUP 38 MB865 User’s Manual Advanced Chipset Features This Setup me nu controls the configuration of t he chipset. Phoenix - AwardBIOS CMOS Setup Utility Advanced Chipset Features DRAM Timing Selectabl e By SPD ITEM HELP CAS Latency Time 2.5 Menu Level Active to Precharge D elay 7 DRAM RAS# to CAS# Dela y 3 DRAM RAS# Precharg e 3 Memory Fre[...]

  • Page 43

    BIOS SETUP MB865 User’s Manual 39 Memory Frequency For This field sets the frequency o f the DRAM memory installed. The default setting is Auto . The other settings are DDR266,DDR320 and DDR400 . System BIOS Cacheable The setting of Enabled allows caching of the system BIOS ROM at F000h-FFFFFh, resulting in better system perform ance. However, if[...]

  • Page 44

    BIOS SETUP 40 MB865 User’s Manual Integrated Peripherals Phoenix - AwardBIOS CMOS Setup Utility Integrated Peripherals On-Chip Primary IDE Device Press Enter ITEM HELP Onboard Device Press Enter Menu Level SuperIO Device Press Enter Phoenix - AwardBIOS CMOS Setup Utility OnChip IDE Device IDE Block Mode Enabled ITEM HELP On-Chip Primary PCI IDE E[...]

  • Page 45

    BIOS SETUP MB865 User’s Manual 41 IDE HDD Block Mode This field allows your hard disk cont rolle r to use the fast block m ode to transfer data to and from your hard disk drive. OnChip Primary/Secondary PCI IDE The integrated peripheral controlle r contains an IDE interface with support for two IDE channels. Select Enabled to activate each channe[...]

  • Page 46

    BIOS SETUP 42 MB865 User’s Manual AC97 Audio The default setting of the AC97 Audi o is Auto . CSA LAN (Giga-LAN) The field enables or disables t his Intel Giga BaseT Ethernet cont roller. Init Display First By default, the system initializes the PCI Slot VGA when the system boots. Onboard FDC Controller Select Enabled if your system has a floppy [...]

  • Page 47

    BIOS SETUP MB865 User’s Manual 43 Power Management Setup The Power Manageme nt Setup allows you to save energy of your system effectively. Phoenix - AwardBIOS CMOS Setup Utility Power Management Setup ACPI Function Enabled ITEM HELP Power Management User Define Video Off Method V/H SYNC+Blank Video Off In Suspend Yes Suspend Type Stop Grant Modem[...]

  • Page 48

    BIOS SETUP 44 MB865 User’s Manual Video Off In Suspend When enabled, the video is off in suspend m ode. The default setting is Yes . Suspend Type The default setting for the Suspend Ty pe field is Stop Grant . Modem Use IRQ This field sets the IRQ used b y the Modem. By default, the setting is 3 . Suspend Mode When enabled, and after the set time[...]

  • Page 49

    BIOS SETUP MB865 User’s Manual 45 Reload Global Timer Events The HDD, FDD, COM, LPT Ports, and PCI PIRQ are I/O events which can prevent the system from ent ering a power saving mode or can awaken the system from such a m ode. When an I/O device wants to gain the attention of th e operating system, it signals this b y causing an IRQ to occur. Whe[...]

  • Page 50

    BIOS SETUP 46 MB865 User’s Manual PNP/PCI Configurations This option configures the PCI bus syst em. All PCI bus syst ems on the system use INT#, thus all installed PCI cards must be set to th is value. Phoenix - AwardBIOS CMOS Setup Utility PnP/PCI Configurations PNP OS Installed No ITEM HELP Reset Configuration Data Disabled Resources Controlle[...]

  • Page 51

    BIOS SETUP MB865 User’s Manual 47 PC Health Status This section shows the parameters in determining the PC Health Status. These parameters include temperatures, fan speeds and voltages. Phoenix - AwardBIOS CMOS Setup Utility PC Health Status Hardware Monitor CPU Warning Temperature Enabled Disabled ITEM HELP System Temp. 28°C/82°F CPU Temp 42°[...]

  • Page 52

    BIOS SETUP 48 MB865 User’s Manual Frequency/Voltage Control This section shows the user how to configure t he processor frequency. Phoenix - AwardBIOS CMOS Setup Utility Frequency/Voltag e Control CPU Clock Ratio Auto Detect PCI Clk 14X Disabled ITEM HELP Spread Spectrum Disabled Menu Level CPU Clock Ratio The CPU Ratio, also known as the CPU bus[...]

  • Page 53

    BIOS SETUP MB865 User’s Manual 49 Load Fail-Safe Defaults This option all ows you to load the troubleshooting defaul t values permanently stored in the BIOS ROM. These default settings are non-optimal and di sable all high-perform ance features. Load Setup Defaults This option allows you to lo ad the default v alues to your system configuration. [...]

  • Page 54

    BIOS SETUP 50 MB865 User’s Manual This page is intention ally left blank.[...]

  • Page 55

    DRIVERS INSTALLATION MB865 User’s Manual 51 Drivers Installation This section describes the in stalla tion procedures for software and drivers under the Windows 98, Windows NT 4.0 and Windows 2000. The software and drivers are included with the board. If you fi nd the items m issing, please contact the vendor where you made the purchase. The cont[...]

  • Page 56

    DRIVERS INSTALLATION Intel 865G Chipset Software Intallation Utility The Intel 865G Chipset Drivers should be i nstalled first before the software drivers to enable Plug & Play INF support for Intel chipset components. Follow t he instructions below to com plete the install ation under Windows 98/98SE/ME/2000/XP. 1. Insert the CD that come s wi[...]

  • Page 57

    DRIVERS INSTALLATION 3. When the Welcome screen appears, click Next to continue. 4. Click Yes to accept the software license agreement and proceed with the installation pr o cess. MB865 User’s Manual 53[...]

  • Page 58

    DRIVERS INSTALLATION 5. On Readme Inform ation screen, click Next to cont inue the installation. 6. The Setup p rocess is now complete. Click Fin ish to restart the computer and for changes to ta ke effect. When the computer has restarted, the system will be ab le to find some devices. Restart your computer when prom pted. 54 MB865 User’s Manual[...]

  • Page 59

    DRIVERS INSTALLATION Intel 865G Chipset Graphics Driver The Intel 865G Chipset Fam ily Graphics Drivers com e in the CD with the board . Follo w the instructions b elo w to complete the installation under Windows 98/98SE/ME/2000/XP. 1. Insert the CD that come s with the board and the screen below would appear. Click Intel Chipset s and then Intel 8[...]

  • Page 60

    DRIVERS INSTALLATION 3. Click Yes to accept the software license agreement and proceed with the installation pr o cess. 4. The Setup p rocess is now complete. Click Fin ish to restart the computer and for changes to ta ke effect. When the computer has restarted, the system will be ab le to find some devices. Restart your computer when prom pted. 56[...]

  • Page 61

    DRIVERS INSTALLATION Realtek AC97 Codec Audio Driver Installation Follow the steps below to install the Realtek AC9 7 Codec Aud io Drivers. 1. Insert the CD that come s with the board and the screen below would appear. Click Intel Chipset s, then Intel 865G Chipset Fam ily Drivers. Click Realtek AC97 Co d ec Audio Dr iv ers to start installation. 2[...]

  • Page 62

    DRIVERS INSTALLATION Intel PRO LAN Drivers Installation The Intel PRO LAN drivers support both Intel® PRO/100 and PRO/1000 drivers. Follow the steps below to com plete the instal lation. 1. Insert the CD that come s with the board and the screen below would appear. Click on LAN Card on the left si de to make the LAN drivers selection. Click on Int[...]

  • Page 63

    APPENDIX MB865 User’s Manual 59 Appendix A. I/O Port Address Map Each peripheral device in the system is assigned a set of I/ O port addresses which also becomes the identity of th e device. The following table lists the I/O port ad d resses used. Address Device Description 000h - 01Fh DMA Controller #1 020h - 03Fh Interrupt Controlle r #1 040h -[...]

  • Page 64

    APPENDIX 60 MB865 User’s Manual B. Interrupt Request Lines (IRQ) Peripheral devices use interrupt request l ines to notify CPU for the service required. The following table shows the IRQ used by the devices on board. Level Function IRQ0 System Tim er Output IRQ1 Keyboard IRQ2 Interrupt Cascade IRQ3 Serial Port #2 IRQ4 Serial Port #1 IRQ5 Reserved[...]