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NEX 6620A User's Guide

Rev. B0 0301

Switches and Connectors

2-9

CN13 : Floppy Disk Connector

Pin No.

Description

Pin No.

Description

Ground

Drive Density Select 0

3 Ground 4 NC

Ground

Drive Density Select 1

Ground

Index Pulse Input

Ground

Motor On 0

Ground

Drive Select 1

Ground

Drive Select 0

Ground

Motor On 1

17 Ground 18

Step

Direction

19 Ground 20

Step

Pulse

Ground

Write Disk Data

23 Ground 24

Write

Gate

25 Ground 26 Track

27 Ground 28

Write

Protected

Read Disk Data

31 Ground 32

Head

Select

33 NC 34

Disk

Change

J1, J2 : 2.54mm Single Ramp CPU FAN Connector

Pin No.

Description

Pin No.

Description

1 Ground 2 +12V

3 Sense

J4 : 2.54mm 1x2 JST for Disk On Moudle Power Connector

Pin No.

Description

Pin No.

Description

1 Ground 2 +5V

J7 : 1x5 Pin Header for Keylock & Power LED

Pin No.

Description

Pin No.

Description

1 Pull

High 2

3 Ground 4

Active

Signal

5 Ground

Summary of Contents for NEX 6620A

Page 1: ...NEX 6620A User s Guide Rev B0 0301 NEXCOM NEX 6620A ATX Industry Server Board User s Guide ...

Page 2: ...s This document contains proprietary information protected by copyright All rights are reserved No part of this manual may be reproduced by any mechanical electronic or other means in any form without prior written permission of the manufacturer Trademarks NEX 6620A is registered trademarks of NEXCOM Co Ltd IBM PC is a registered trademark of International Business Machines Corporation Intel and P...

Page 3: ...what are included in the product package Chapter 2 Switches and Connectors describes the definitions and positions of Jumpers and Connectors that you may easily configure and set up per your requirement Chapter 3 Capability Expanding describes how to change or expand the CPU Board by changing the system memory cache memory and CPU to get more power out from the CPU board Chapter 4 Award BIOS Setup...

Page 4: ... so many features integrated on the standard ATX form factor Without any add on cards the NEX 6620A could out perform most of the server boards because there are 2x 100 Base TX Ethernet ports and 2x Ultra 160m SCSI channels on board NEX6620A is particularly suitable for the ISP server applications A 2U chassis could easily accommodate the NEX 6620A For larger server chassis like the big tower 5U 6...

Page 5: ...on die Brand New Socket 370 FC PGA CPU running at 100 133MHz FSB up to 1G Hz Support streaming SIMD instruction Main Memory Support DDR up to 4GB Max DDR Socket x 4 ECC support single bit error correction Multiple bit errors reporting BIOS Award System BIOS Plug Play support Advanced Power Management support Advanced Configuration Power Interface support Jumper less for CPU FSB 2M bits flash ROM C...

Page 6: ...ntroller 5 25 360KB 1 2MB 3 5 720KB 1 2MB 1 44MB 2 88MB support 34 pin connector 1 On chip enhanced IDE 2 PIO up to mode 4 DMA master up to mode 2 Ultra DMA 33 66 100 support total 4 E IDE Devices support 40 pin connector 2 On chip keyboard mouse controller On board USB port 4 2 front 2 rear On board buzzer 1 IrDA connector 1 On board 2 pin header for I 2 C GPIO 4 in 4 out On board 2 pin header fo...

Page 7: ...ensions Dimensions 305mm L x 244mm W Back Panel PS2 connector 2 for Keyboard Mouse USB port 2 RJ45 connector 2 for LAN 15 pin D type connector 1 for VGA 9 pin D type connector 2 for SIO 25 pin D type connector 1 for PIO LAN LED 4 active link 2 speed 2 NEX 6620A NEX 6620 NEX 6620VL2 Power Requirements With Basic configuration running Windows 2000 WIN HCT system stress 3 3V 1A 5V 13A 12V 0 8A 5VSTBY...

Page 8: ... User s Guide Rev B0 0301 Switches and Connectors 2 1 Chapter 2 Switches and Connectors 2 1 Main Board Layout This chapter gives the definitions and shows where to locate the positions of switches and connectors ...

Page 9: ...NEX 6620A User s Guide Rev B0 0301 Switches and Connectors 2 2 2 2 Connector Pin Define Jumper Setting ...

Page 10: ...7 Chassis Ground M7 Chassis Ground K8 Chassis Ground M8 Chassis Ground CN2 ATX Power Connector Pin No Description Pin No Description 1 3 3V 11 3 3V 2 3 3V 12 12V 3 Ground 13 Ground 4 5V 14 PS_ON 5 Ground 15 Ground 6 5V 16 Ground 7 Ground 17 Ground 8 PWR_OK 18 5V 9 5V_Standby 19 5V 10 12V 20 5V CN3 Dual High PC99 Complied USB Connector for USB1 USB2 Pin No Description Pin No Description 1 5V Standb...

Page 11: ...ter Select 14 Auto Form Feed 15 Error 16 Initialize 17 Printer Select IN 18 Chassis Ground 19 Chassis Ground 20 Chassis Ground 21 Chassis Ground 22 Chassis Ground 23 Chassis Ground 24 Chassis Ground 25 Chassis Ground 26 Red 27 Green 28 Blue 29 N A 30 Ground 31 Chassis Ground 32 Chassis Ground 33 Chassis Ground 34 5V 35 Ground 36 Pull up 37 DDC Data 38 Horizontal Sync 39 Vertical Sync 40 DDC Clock ...

Page 12: ...it Data 2 4 Data Terminal Ready 2 5 Chassis Ground 6 Data set Ready 2 7 Request to Send 2 8 Clear to Send 2 9 Ring Indicator 2 10 Data Carrier Detect 1 11 Receive Data 1 12 Transmit Data 1 13 Data Terminal Ready 1 14 Chassis Ground 15 Data set Ready 1 16 Request to Send 1 17 Clear to Send 1 18 Ring Indicator 1 19 Chassis Ground 20 Chassis Ground 21 Chassis Ground 22 Chassis Ground CN7 Stand alone ...

Page 13: ...NE 6 LAN1 RX 7 TERMPLANE 8 TERMPLANE 9 LAN2 TX 10 LAN2 TX 11 LAN2 RX 12 TERMPLANE 13 TERMPLANE 14 LAN2 RX 15 TERMPLANE 16 TERMPLANE 17 Chassis Ground 18 Chassis Ground 19 Chassis Ground 20 Chassis Ground 21 Chassis Ground 22 Chassis Ground 23 Chassis Ground 24 Chassis Ground CN9 ATX AUX Power Connector Pin No Description Pin No Description 1 Ground 2 Ground 3 Ground 4 3 3V 5 3 3V 6 5V ...

Page 14: ...Data 5 8 Data 10 9 Data 4 10 Data 11 11 Data 3 12 Data 12 13 Data 2 14 Data 13 15 Data 1 16 Data 14 17 Data 0 18 Data 15 19 Ground 20 NC 21 DMA REQ 22 Ground 23 IOW 24 Ground 25 IOR 26 Ground 27 IOCHRDY 28 Pull Down 29 DMA ACK 30 Ground 31 Interrupt 14 32 NC 33 Disk Address 1 34 DMA66 Detect 35 Disk Address 0 36 Disk Address 2 37 HDC CS100 38 HDC CS300 39 HDD Active Led 40 Ground ...

Page 15: ... 25 Plus Reset 26 Plus Message 27 Plus Select 28 Plus Command Data 29 Plus Request 30 Plus In Out 31 Plus Data8 32 Plus Data9 33 Plus Data10 34 Plus Data11 35 Minus Data12 36 Minus Data13 37 Minus Data14 38 Minus Data15 39 Minus High Byte Parity 40 Minus Data0 41 Minus Data1 42 Minus Data2 43 Minus Data3 44 Minus Data4 45 Minus Data5 46 Minus Data6 47 Minus Data7 48 Minus Low Byte Parity 49 Ground...

Page 16: ... 18 Step Direction 19 Ground 20 Step Pulse 21 Ground 22 Write Disk Data 23 Ground 24 Write Gate 25 Ground 26 Track 0 27 Ground 28 Write Protected 29 NC 30 Read Disk Data 31 Ground 32 Head Select 33 NC 34 Disk Change J1 J2 2 54mm Single Ramp CPU FAN Connector Pin No Description Pin No Description 1 Ground 2 12V 3 Sense J4 2 54mm 1x2 JST for Disk On Moudle Power Connector Pin No Description Pin No D...

Page 17: ... Description Pin No Description 1 Pull up 2 Active signal J11 1x2 Pin Header for Intruder SW Pin No Description Pin No Description 1 Active signal 2 Ground J12 1x2 Pin Header for Reset SW Pin No Description Pin No Description 1 Ground 2 Reset J13 1x2 Pin Header for Power Button Pin No Description Pin No Description 1 Active signal 2 Ground J14 1x4 Pin Header for Buzzer External Speaker Pin 3 4 Sho...

Page 18: ...IrDA Pin No Description Pin No Description 1 5V 2 NC 3 IR Receiver 4 Ground 5 IR Transceiver J21 2 54mm 1x6 JST Connector for USB3 USB4 Pin No Description PIN No Description 1 5V Standby 2 USB3 Minus 3 USB3 Plus 4 USB4 Minus 5 USB4 Plus 6 EMI Ground J22 J23 J24 2 54mm 1x3 JST CASE FAN Connector Pin No Description Pin No Description 1 Sense 2 12V 3 Ground J25 1x2 Pin Header for BIOS Hardware Protec...

Page 19: ...NEX 6620A User s Guide Rev B0 0301 Switches and Connectors 2 12 JP1 1x3 Jumper for On Board RTC Default Pin No Description 1 2 Short Operation Mode 2 3 Short Clear CMOS ...

Page 20: ...M To install the DDR DIMM s first make sure the two handles of the DIMM socket are in the open position i e the handles stay outward Slowly slide the DIMM modules along the plastic guides in the both ends of the socket Then press the DIMM module down right into the socket until a click is heard That means the two handles automatically locked the memory modules into the right position of the DIMM s...

Page 21: ...NEX 6620A User s Guide Rev B0 0301 Capability Expanding 3 2 This page is intentionally left blank ...

Page 22: ...contact htm 4 1 BIOS Setup Entering Setup Power on the computer and press Del immediately will allow you to enter Setup The other way to enter Setup is to power on the computer when the below message appears briefly at the bottom of the screen during the POST Power On Self Test press Del key or simultaneously press Ctrl Alt and Esc keys TO ENTER SETUP BEFORE BOOT PRESS CTRL ALT ESC OR DEL KEY If t...

Page 23: ...PgDn key Decrease the numeric value or make changes F1 key F1 General help only for Status Page Setup Menu and Option Page Setup Menu Shift F2 key Change color from total 16 colors F2 to select color forward Shift F2 to select color backward F3 key Reserved F4 key Reserved F5 key Restore the previous CMOS value from CMOS only for Option Page Setup Menu F6 key Load the default CMOS value from BIOS ...

Page 24: ...s a sub menu containing additional op tions for the field can be launched from this field To enter the sub menu highlight the field and press Enter Then you can use control keys to move between and change the settings of the sub menu To return to the main menu press Esc Status Page Setup Menu Option Page Setup Menu Press F1 to pop up a small help window that describes the appropriate keys to use a...

Page 25: ...nter to accept or enter the sub menu Standard CMOS Features Use this menu for basic system configuration Advanced BIOS Features Use this menu to set the Advanced Features available on your system Advanced Chipset features Use this menu to change the values in the chipset registers and optimize your system s performance Integrated Peripherals Use this menu to specify your settings for integrated pe...

Page 26: ...mance for your system to operate Load Optimized Defaults Use this menu to load the BIOS default values that are factory settings for optimal performance system operations While Award has designed the custom BIOS to maximize performance the factory has the right to change these defaults to meet their needs Set User Password Change set or disable password of supervisor or user It allows you to limit...

Page 27: ...en you set the date Time HH MM SS Set the system time IDE Primary Master Options are in its sub menu Described in Table 4 3 Press Enter to enter the sub menu of detailed options IDE Primary Slave Options are in its sub menu Described in Table 4 3 Press Enter to enter the sub menu of detailed options IDE Secondary Master Options are in its sub menu Described in Table 4 3 Press Enter to enter the su...

Page 28: ...you must have a 3 Mode floppy drive Video EGA VGA CGA 40 CGA 80 MONO Select the default video device Halt On All Errors No Errors All but Keyboard All but Diskette All but Disk Key Select the situation in which you want the BIOS to stop the POST process and notify you Base Memory N A Displays the amount of conventional memory detected during boot up Extended Memory N A Displays the amount of exten...

Page 29: ...ype of fixed disk User Type will let you select the number of cylinders heads etc Note PRECOMP 65535 means NONE Capacity Auto Display your disk drive size Disk drive capacity Approximated Note that this size is usually slightly greater than the size of a formatted disk given by a disk checking program Access Mode Normal LBA Large Auto Choose the access mode for this hard disk The following options...

Page 30: ...is enabled and someone attempt to write data into this area BIOS will show a warning message on screen and alarm beep Enabled Activates automatically when the system boots up causing a warning message to appear when anything attempts to access the boot sector or hard disk partition table Disabled No warning message will appear when anything attempts to access the boot sector or hard disk partition...

Page 31: ...t to Enable BIOS will shorten or skip some check items during POST The Choice Enabled Disabled First Second Third Boot Device The BIOS attempts to load the operating system from the devices in the sequence selected in these items The Choice Floppy LS120 HDD 0 SCSI CDROM HDD 1 Hdd 2 HDD 3 ZIP100 USB FDD USB ZIP USB CDROM USB HDD Disabled Boot Other Device If all the selected boot devices failed to ...

Page 32: ...ice 250 500 750 1000 Security Option Select whether the password is required every time the system boots or only when you enter setup System The system will not boot and access to Setup will be denied if the correct password is not entered at the prompt Setup The system will boot but access to Setup will be denied if the correct password is not entered at the prompt Note To disable security select...

Page 33: ... M A R T capable The settings for this option are Disabled or Enabled Note S M A R T cannot predict all future device failures S M A R T should be used as a warning tool not as a tool to predict the device reliability The Choice Enabled Disabled Video BIOS Shadow It determines whether video BIOS will be copied to RAM however it is optional from chipset design Video Shadow will increase the video s...

Page 34: ...ust be stated that these items should never need to be altered The default settings have been chosen because they provide the best operating conditions for your system The only time you might consider making any changes would be if you discovered that data was being lost while using your system The first chipset settings deal with CPU access to dynamic random access memory DRAM The default timings...

Page 35: ...on the DRAM card or Manual controls DRAM timing Selecting Manual allows you to control SDRAM Cycle Length and Bank Interleave by yourself It is strongly suggested to select By SPD to avoid causing any system error The Choice Manual By SPD SDRAM Cycle Length Controls the time delay in clock cycles before SDRAM starts a read command after receiving it The Choice 3 2 5 2 Bank Interleave Enables or di...

Page 36: ...nction Enable this function can increase AGP performance The Choice Enabled Disabled AGP Master 1 WS Write AGP Master One Wait State Write control The Choice Enabled Disabled AGP Master 1 WS Read AGP Master One Wait State Read control The Choice Enabled Disabled CPU PCI Bus Control Press Enter to enter the sub menu and you will see a sub menu CPU to PCI Write Buffer Enables or disables CPU to PCI ...

Page 37: ... The Choice Disabled 15M 16M System BIOS Cacheable Selecting Enabled allows caching of the system BIOS ROM at F0000h FFFFFh resulting in better system performance However if any program writes to this memory area a system error may result The Choice Enabled Disabled Memory Parity ECC Check Select Parity ECC error correcting code according to the type of installed DRAM The Choice Enabled Disabled ...

Page 38: ...N Boot ROM as boot up your computer The Choice Disabled LAN1 LAN2 Onboard SCSI Boot ROM Select enabled if you wish to run the SCSI Boot ROM as boot up your computer The Choice Enabled Disabled VIA OnChip IDE Device Press Enter to enter the sub menu and you will see a sub menu OnChip IDE Channel0 Channel1 The chipset contains a PCI IDE interface with support for two IDE channels Select Enabled to a...

Page 39: ... includes a DMA driver Windows 95 OSR2 or a third party IDE bus master driver If your hard drive and your system software both support Ultra DMA select Auto to enable BIOS support The Choice Auto Disabled IO Device Press Enter to enter the sub menu and you will see a sub menu POWER ON Function This item allows you the select power on event The Choice Any Key Button Only Keyboard 98 Onboard FDC Con...

Page 40: ...ct a DMA channel for the parallel port for use during ECP mode The Choice 3 1 Init Display First This item allows you to decide to active whether PCI Slot AGP or on board VGA first The Choice PCI Slot Onboard AGP USB Controller The item specifies which USB Universal Serial Bus Port is enabled The Choice All Disabled All Enabled 1 2 USB Port 2 3 USB Port 1 3 USB Port 1 USB Port 2 USB Port 3 USB Por...

Page 41: ...led Power Management This category allows you to select the type or degree of power saving and is directly related to the following modes 1 HDD Power Down 2 Suspend Mode There are four selections for Power Management three of which have fixed mode settings Min Power Saving Minimum power management Suspend Mode 1 hr Max Power Saving Maximum power management Suspend Mode 1 min User Defined Allows yo...

Page 42: ...off the vertical and horizontal synchronization ports and write blanks to the video buffer Blank Screen This option only writes blanks to the video buffer DPMS Support Initial display power management signaling MODEM Use IRQ This determines the IRQ in which the MODEM can use The Choice 3 4 5 7 9 10 11 NA Soft Off by PWR BTTN Pressing the power button for more than 4 seconds forces the system to en...

Page 43: ...the time for RTC Alarm Resume Format is hour minute second IRQs Activity Monitoring Press Enter to enter the sub menu and you will see a sub menu PM events whose occurrence can prevent the system from entering a power saving mode or can awaken the system from such a mode In effect the system remains alert for anything which occurs to a device which is configured as Enabled even when the system is ...

Page 44: ...5 The Choice Yes No Reset Configuration Data Normally you leave this field Disabled Select Enabled to reset Extended System Configuration Data ESCD when you exit Setup if you have installed a new add on Card and the system reconfiguration has caused such a serious conflict that the operating system cannot boot The Choice Enabled Disabled Resources Controlled by The Award Plug and Play BIOS has the...

Page 45: ...N A C800 CC00 D000 D400 D800 DC00 Reserved Memory Length This item is available only when the Used MEM Base Addr has been assigned a base address It specifies the memory size for the add in card used The Choice 8K 16K 32K 64K PCI VGA Palette Snoop Leave this field at Disabled The Choice Enabled Disabled Assign IRQ For VGA USB Enable Disable to assign a IRQ for VGA USB The Choice Enabled Disabled P...

Page 46: ...he specified standard the system will issue a warning and allows you to prevent the CPU overheat problem The Choice 30 120 Current CPU1 CPU2 Temp Current CPUFAN1 2 Speed CPU1 2 Vcore Vtt 3 3 5 12 12 5 2 5V Current Extend FAN1 2 3 Speed These items display the current status of all of the monitored hardware devices components such as CPU voltages temperatures and fans s speed ...

Page 47: ... CPU PCI clock but this function depends on different CPU performance It is highly recommended to use the default setting by the CPU ID auto detect The standard CPU Clock will be 100MHZ or 133MHZ If you set the wrong CPU clock cause the system can t power on please do hardware clear the CMOS to reset the BIOS default value then setup the correct CPU clock Or you can press INSERT key to power on sy...

Page 48: ...also press Esc to abort the selection and not enter a password To disable a password just press Enter when you are prompted to enter the password A message will confirm the password will be disabled Once the password is disabled the system will boot and you can enter Setup freely PASSWORD DISABLED When a password has been enabled you will be prompted to enter it every time you try to enter Setup T...

Page 49: ...d the system cannot boot with the CMOS values selected in Setup restart the system by turning it OFF then ON or Pressing the RESET button on the system case You may also restart by simultaneously press Ctrl Alt and Delete keys Upon restart the system immediately press Insert to load BIOS default CMOS value for boot up ...

Page 50: ...d CMOS CHECKSUM ERROR Checksum of CMOS is incorrect This can indicate that CMOS has become corrupt This error may have been caused by a weak battery Check the battery and replace if necessary DISK BOOT FAILURE INSERT SYSTEM DISK AND PRESS ENTER No boot device was found This could mean that either a boot drive was not detected or the drive does not contain proper system boot files Insert a system d...

Page 51: ...RROR ENCOUNTERED INITIALIZING HARD DRIVE Hard drive cannot be initialized Be sure the adapter is installed correctly and all cables are correctly and firmly attached Also be sure the correct hard drive type is selected in Setup ERROR INITIALIZING HARD DISK CONTROLLER Cannot initialize controller Make sure the cord is correctly and firmly installed in the bus Be sure the correct hard drive type is ...

Page 52: ...peat POST procedure infinitely while the P15 of keyboard controller is pull low This is also used for M B burn in test Memory Address Error at Indicates a memory address error at a specific location You can use this location along with the memory map for your system to find and replace the bad memory chips Memory test fail BIOS reports the memory test fail if the onboard memory is tested error Mem...

Page 53: ... appears the system will boot in ISA mode which allows you to run the EISA Configuration Utility Should Have EISA Board But Not Found PLEASE RUN EISA CONFIGURATION UTILITY The board installed is not responding to the ID request or no board ID has been found in the indicated slot NOTE When this error appears the system will boot in ISA mode which allows you to run the EISA Configuration Utility Slo...

Page 54: ...h Reserved 03h Initial Superio_Early_Init switch 04h Reserved 05h 1 Blank out screen 2 Clear CMOS error flag 06h Reserved 07h 1 Clear 8042 interface 2 Initialize 8042 self test 08h 1 Test special keyboard controller for Winbond 977 series Super I O chips 2 Enable keyboard interface 09h Reserved 0Ah 1 Disable PS 2 mouse interface optional 2 Auto detect ports for keyboard mouse followed by a port in...

Page 55: ... specified all H W interrupts are directed to SPURIOUS_INT_HDLR S W interrupts to SPURIOUS_soft_HDLR 1Ch Reserved 1Dh Initial EARLY_PM_INIT switch 1Eh Reserved 1Fh Load keyboard matrix notebook platform 20h Reserved 21h HPM initialization notebook platform 22h Reserved 23h 1 Check validity of RTC value e g a value of 5Ah is an invalid value for RTC minute 2 Load CMOS settings into BIOS stack If CM...

Page 56: ...ard IDE controller 4 Measure CPU speed 5 Invoke video BIOS 2Ah Reserved 2Bh Reserved 2Ch Reserved 2Dh 1 Initialize multi language 2 Put information on screen display including Award title CPU type CPU speed 2Eh Reserved 2Fh Reserved 30h Reserved 31h Reserved 32h Reserved 33h Reset keyboard except Winbond 977 series Super I O chips 34h Reserved 35h Reserved 36h Reserved 37h Reserved 38h Reserved 39...

Page 57: ...rved 4Eh 1 Program MTRR of M1 CPU 2 Initialize L2 cache for P6 class CPU program CPU with proper cacheable range 3 Initialize the APIC for P6 class CPU 4 On MP platform adjust the cacheable range to smaller one in case the cacheable ranges between each CPU are not identical 4Fh Reserved 50h Initialize USB 51h Reserved 52h Test all memory clear all extended memory to 0 53h Reserved 54h Reserved 55h...

Page 58: ...rved 62h Reserved 63h Reserved 64h Reserved 65h Initialize PS 2 Mouse 66h Reserved 67h Prepare memory size information for function call INT 15h ax E820h 68h Reserved 69h Turn on L2 cache 6Ah Reserved 6Bh Program chipset registers according to items described in Setup Auto configuration table 6Ch Reserved 6Dh 1 Assign resources to all ISA PnP devices 2 Auto assign ports to onboard COM ports if the...

Page 59: ...en logo is supported If errors occur report errors wait for keys If no errors occur or F1 key is pressed to continue 2 Clear EPA or customization logo 80h Reserved 81h Reserved E8POST ASM starts 82h 1 Call chipset power management hook 2 Recover the text fond used by EPA logo not for full screen logo 3 If password is set ask for password 83h Save all data in stack back to CMOS 84h Initialize ISA P...

Page 60: ...94h 1 Enable L2 cache 2 Program boot up speed 3 Chipset final initialization 4 Power management final initialization 5 Clear screen display summary table 6 Program K6 write allocation 7 Program P6 class write combining 95h 1 Program daylight saving 2 Update keyboard LED typematic rate 96h 1 Build MP table 2 Build update ESCD 3 Set CMOS century to 20h or 19h 4 Load CMOS time into DOS timer tick 5 B...

Page 61: ...B 4 Digital Output 1 Output High Output Low J15 2 84B 5 Digital Output 2 Output High Output Low J15 4 84B 6 Digital Output 3 Output High Output Low J15 6 84B 7 Digital Output 4 Output High Output Low J15 8 Programming Example Example 1 Set Digital_Output_1 output High Mov DX 84Bh Set I O Port In AL DX Read Register Data Or AL 00010000b Set bit4 1 let Digital_Output_1 output High Out DX AL Set Regi...

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