DFI 486-OCV Plus User Manual Download

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486-OCV Plus

System Board

User’s Manual

- D21840429 -

Summary of Contents for 486-OCV Plus

Page 1: ...486 OCV Plus System Board User s Manual D21840429...

Page 2: ...nformation in this document is subject to change without notice DFI Inc reserves the right to make revisions to this publication and to make changes to any and or all parts of its content at any time...

Page 3: ...ternal External CMOS Clean Display Type and Diagnostic Password Clear Cache Configuration Jumper Settings for Cache Memory CPU Installation and Upgrade CPU Configuration Jumper Settings for CPUs Insta...

Page 4: ...list Appendix A Types of Modules Appendix B System Error Report Appendix C Memory I O Maps Appendix D 16 Bit ISA I O Pin Assignments Appendix E VL Bus I O Pin Assignments Appendix F System Overview Ap...

Page 5: ...to easily upgrade your CPU from a 486SX to 486DX or DX2 for example without altering any jumpers However if you change your CPU speed from 25MHz to 33MHz 40MHz or 50MHz or change a Cyrix CPU to an In...

Page 6: ...AMD 486DX running at 40MHz Uses AMI BIOS 27512 20 1 Uses OPTi 82C499 chip set Cache organization direct map write back and bank interleave Supports 64K 128K and 256K cache sizes Memory configurable fr...

Page 7: ...X 50 CPU we recommend that you do not install any VL Bus devices The VL Bus connectors compliant with VESA VL Bus standard rev 1 0 limit the speed of a VL Bus device operating across the connector e g...

Page 8: ...abilities of your system board Avoid soft surfaces such as beds and carpeted floors which can hinder air circulation These areas also attract static electricity which can damage some circuits on your...

Page 9: ...its anti static bag until you are ready to install it 2 Wear an antistatic wriststrap 3 Do all preparation work on a static free surface with components facing up 4 Hold the system board by its edges...

Page 10: ...lem may occur if a longer size of module is installed You will need 1 to 4 pieces of HSIM modules depend ing on the amount of memory you intend to install Your system board can be configured with 1MB...

Page 11: ...56Kx36 1Mx36 1Mx36 1Mx36 13MB 256Kx36 1Mx36 2Mx36 16MB 1Mx36 1Mx36 1Mx36 1Mx36 16MB 2Mx36 2Mx36 16MB 4Mx36 18MB 256Kx36 256Kx36 4Mx36 18MB 512Kx36 4Mx36 20MB 1Mx36 4Mx36 20MB 4Mx36 1Mx36 24MB 1Mx36 1M...

Page 12: ...0MB 1Mx36 1Mx36 4Mx36 4Mx36 40MB 2Mx36 8Mx36 40MB 1Mx36 4Mx36 4Mx36 1Mx36 40MB 4Mx36 1Mx36 4Mx36 1Mx36 40MB 4Mx36 4Mx36 1Mx36 1Mx36 40MB 8Mx36 2Mx36 48MB 4Mx36 4Mx36 4Mx36 48MB 8Mx36 4Mx36 52MB 1Mx36...

Page 13: ...the System Board Installing the Modules HSIMMs simply snap into a socket on the system board Pin 1 of the HSIMM must correspond with Pin 1 of the socket Pin 1 of the HSIMM socket OPTi 82C499 Bank 0 B...

Page 14: ...ilt the module upright until it locks in place in the socket Board Configuration The 486 OCV Plus is designed with jumpers and con nectors onboard Make sure that the jumpers are set correctly before i...

Page 15: ...ngs for VL Bus Add On Board If a VL Bus add on board is installed in the 486 OCV Plus system board make sure Jumpers JP18 JP23 JP24 and JP34 are set correctly Locations of Jumpers JP18 JP23 JP24 and J...

Page 16: ...you are not sure that your add on board s support Zero Wait State set JP23 to On otherwise a system error may occur On One Wait State Off Zero Wait State Jumper JP24 CPU Speed for VL Bus Board If a VL...

Page 17: ...2 1 3 2 1 Jumper JP34 VL Bus Address Select If the 486 OCV Plus system board is using a 40MHz or 50MHz 486DX CPU VESA VL Bus add on boards may not work when Jumper JP34 is set to No Delay In this cas...

Page 18: ...Internal External CMOS Clean Display Type and Diagnostic Password Clear Jumper J11 enables or disables the internal battery external battery or CMOS Clean JP29 allows you to select between a color or...

Page 19: ...becomes corrupted the system can be reconfigured with the default values stored in the ROM chips To load the default values set J11 pins 2 and 3 to On for approximately one to two days then return to...

Page 20: ...e sure that this jumper is changed accordingly Jumper JP39 Diagnostic Password Clear If you had enabled the Password Checking Option in the Advanced CMOS Setup and forgot your password set Jumper JP39...

Page 21: ...is installed for tag RAM the cacheable system RAM size is dependent on the size of cache installed on your system board The system board can automatically detect the cacheable system RAM size based on...

Page 22: ...20 U21 U22 U3 Locations of the SRAM Sockets on the 486 OCV Plus System Board Cache Size U14 U15 U16 U17 U19 U20 U21 U22 U3 64KB 8K x 8 8K x 8 8K x 8 128KB 32K x 8 None 8K x 8 256KB 32K x 8 32K x 8 16K...

Page 23: ...486 OCV Plus Jumper Settings for Cache Memory Locations of Jumpers JP6 JP9 on the 486 OCV Plus System Board JP6 JP9 JP7 JP8 OPTi 82C499 InstallationOverview u 2 16...

Page 24: ...Ready System Board Cache Memory Size Jumpers 64KB 128KB 256KB JP6 Off On On JP7 Off Off On JP8 2 3 On 1 2 On 2 3 On JP9 2 3 On 1 2 On 2 3 On Default setting On Off 2 1 3 1 3 2 1 2 On 2 3 On 2 17 u In...

Page 25: ...ystem board CPU Configuration Location U8 of the 486 OCV Plus system board is a 237 pin ZIF socket for the Intel 486TM family of CPUs 486 OverDriveTM Processors and the PentiumTM OverDrive Processor T...

Page 26: ...ettings for CPUs Locations of Jumpers JP12 JP14 JP25 and JP38 on the 486 OCV Plus System Board JP12 JP14 JP13 OPTi 82C499 JP25 JP38 Jumpers JP12 JP14 and JP25 Clock Selection These jumpers should be s...

Page 27: ...TM OverDrive Processor 66MHz 486SX DX 40 486DX 50 JP12 Off On On Off JP13 Off Off On Off JP14 On On Off On JP25 2 3 On 2 3 On 1 2 On 1 2 On 1 2 3 1 2 3 2 3 On 1 2 On On Off Jumper JP38 CPU Type Select...

Page 28: ...are for factory testing only and should always be set to their default configurations Reconfiguring these jumpers will cause problems with your 486 OCV Plus system board JP26 1 2 On JP31 1 2 On JP32...

Page 29: ...ve processors and Cyrix or AMD 486DX 40 CPU The ZIF socket allows easy CPU upgrades and minimizes the chance of breaking off CPU pins Warning Open the socket only if actually installing an upgrade CPU...

Page 30: ...talled The PentiumTM OverDrive Processor has four rows of pins on each side and should be installed so it covers all the pin holes of the ZIF socket To install simply move the handle upward Remove the...

Page 31: ...ip simply lift the handle and remove the chip Warning A minimum of 1 4 vertical clearance measured above the socket surface must be kept free above the CPU Do not run cables or other obstructions in t...

Page 32: ...onOverview Adequate airflow for cooling must be provided over the CPU For PentiumTM OverDrive Processors the airflow must be adequate to keep the system temperature below 40o C measured 0 5 inch above...

Page 33: ...hilips screwdriver Step 1 Unlock your system unit Turn off the power and dis connect all power cords and cables Step 2 Remove the system unit cover Refer to the manufac turer s instructions if necessa...

Page 34: ...d location of the SIM modules is dependent upon the memory configuration and type of modules you intend to use Step 6 Set the corresponding jumpers Step 7 Install the prepared 486 OCV Plus system boar...

Page 35: ...is AMI You have three chances to type the correct password If the password is still incorrect after the third try the system will lock up You must turn your system off and back on to restart it You ca...

Page 36: ...ge below Enter CURRENT Password The default password is AMI For information on how to change the password refer to the Change Password section on page 3 8 After entering the correct pass word the scre...

Page 37: ...ress Enter to continue or Esc to abort If the system fails after the setup procedure power off the computer and turn it on again Wait for the message Hit Del if you want to run setup and press Del Sta...

Page 38: ...right hand corner is a calendar that shows the current date The box at the lower left provides information on each highlighted parameter Navigation and menu selection instructions are located below th...

Page 39: ...is showing Fill in all the param eters as specified by the drive manufacturer To move between parameters hit the Enter key When you are through making changes press Esc to return to the main menu Adva...

Page 40: ...ying to access setup The Boot Sector Virus Protection option may be set to enabled or disabled When enabled the BIOS issues a warning when any program or virus sends a Disk Format command or attempts...

Page 41: ...OS Setup Default Values from ROM Table Y N N Type Y and press Enter to return to the BIOS setup default values After pressing Enter you will be returned to the main menu Auto Configuration with Power...

Page 42: ...word Option must be enabled in Advanced CMOS Setup Press any key to continue Use the arrow keys to highlight the Change Password Option and press Enter The message below will appear Enter Current Pass...

Page 43: ...assword Failure to do so will yield the error message shown below Error press any key If you receive this error you will have to start all over After typing in the new password the message below will...

Page 44: ...meters for hard disk Type 47 will be displayed in Standard CMOS Setup If you select N the parameters in the Standard CMOS Setup will remain the same Hard Disk Utility This option will format set the i...

Page 45: ...S memory and the system will reboot You will once again see the initial diagnostics on the screen If you wish to make additional changes to the setup press Del after memory testing is done Do Not Writ...

Page 46: ...e jumpers are properly set If in doubt refer to the Board Configuration section 2 Verify that all SIM modules are seated securely into the bank sockets 3 Make sure that the SIM modules are in the corr...

Page 47: ...is board Most untested brands will work but a few may fail to do so For SIM 256Kx36 Modules Brand Chip Number Hitachi HM514280 JP8 OKI M516256B 80J Fujitsu 81C4256 80 For SIM 512K36 Modules Brand Chip...

Page 48: ...PentiumTM OverDrive Ready System Board A 2 u AppendixA For SIM 2Mx36 Modules Brand Chip Number Fujitsu 814400 80 OKI M511000B 70J...

Page 49: ...rs are those which will not allow a system to continue the boot up procedure If a fatal error occurs you should consult your system manufacturer for repair Beep Count Error Message 1 Refresh Failure 2...

Page 50: ...7 CMOS Display Type Mismatch 8 Display Switch Not Proper 9 Keyboard is Locked Unlock It 10 Keyboard Error 11 KB Interface Error 12 CMOS Memory Size Mismatch 13 FDD Controller Failure 14 HDD Controller...

Page 51: ...System Board Memory 009FFFF Board RAM 00A0000 to 128K Video Reserved for Graphics Display 00BFFFF Display Memory Memory 00C0000 to 192K I O Reserved for ROM on I O 00EFFFF Expansion ROM Adapter Card...

Page 52: ...Bit 0F0 Clear Numeric Processor Extension Busy 0F1 Reset Numeric Processor Extension 0F8 OFF Numeric Processor Extension 1F0 1F8 Fixed Disk 200 207 Game I O 278 27F Parallel Printer Port 2 2F8 2FF Se...

Page 53: ...er Gnd 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 C SBHE LA23 LA22 LA21 LA20 LA19 LA18 LA17 Memr Memw SD08 SD09 SD10 SD11 SD12 SD13 SD14 SD15 B Gnd Reset Drv 5V DC IRQ9 5V DC DRQ2 12V DC OW...

Page 54: ...T03 GND DAT05 DAT07 DAT09 DAT11 DAT13 DAT15 GND DAT17 Vcc DAT19 DAT21 DAT23 DAT25 GND DAT27 DAT29 DAT31 ADR30 ADR28 ADR26 GND ADR24 ADR22 Vcc ADR20 ADR18 ADR16 ADR14 ADR12 ADR10 ADR08 GND ADR06 ADR04...

Page 55: ...A LKEN 1 O O I I LRDY 1 I I N A O LREQ x 4 1 I I O O M IO 1 O I O I RDYRTN 1 O O I I RESET 1 O O I I W R 1 O I O I WBACK 1 O O I N A power 8 ground 14 reserved 1 Total per slot 112 1 Direction of sig...

Page 56: ...ed for User Ch4 Cascade for CTRL 1 Ch1 SDLC Ch5 Reserved for User Ch2 Diskette IBM Personal Computer Ch6 Reserved for User Ch3 Reserved for User Ch7 Reserved for User Note DMA controller 1 supports 8...

Page 57: ...to report memory parity errors The memory parity is derived from the system board memory and I O adapter optional memory Interrupt Controller 1 Interrupt Controller 2 IRQ0 Timer Output 0 Out 0 IRQ8 R...

Page 58: ...Q12 IRQ13 IRQ14 IRQ15 IRQ3 IRQ4 IRQ5 IRQ6 IRQ7 System Timers Channel 0 System Timer IRQ0 Channel 1 Refresh Request Generator 15us Rate Generator Period Signal Channel 2 Tone Generation for Speaker Rea...

Page 59: ...gn with an access time of 80ns or less Cache Module The 486 OCV Plus supports 64KB 128KB of direct map cache using 8Kx8 20ns SRAMs or 256KB using 32Kx8 20ns SRAMs Burst Cycles The 486 microprocessor a...

Page 60: ...pendixG v Appendix G Connector Pin Assignments Jumper J1 Diagnostic LCD Port Function Vcc XD0 XD1 XD2 XD3 XD4 XD5 XD6 XD7 Gnd Pin 1 2 3 4 5 6 7 8 9 10 Connector J2 Keyboard Connector Pin 1 2 3 4 5 Fun...

Page 61: ...486 OCV Plus AppendixG u G 2 Jumper J3 Speaker Connector Pin 1 2 3 4 Function Speaker NC Ground VCC Jumper J4 Keylock Connector Pin 1 2 3 4 5 Function LED Power Key Ground Keyboard Inhibitor Ground...

Page 62: ...y System Board G 3 u AppendixG Jumper J5 Turbo LED Connector Pin 1 2 Function LED Power Jumpers J6 J8 Reset Switch Connectors Pin 1 2 Function Ground Reset Switch Jumper J7 Turbo Switch Connector Pin...

Page 63: ...V Plus AppendixG u G 4 Jumper J9 PS 2 Mouse Connector Pin 1 2 3 4 5 6 Function Mouse Data N C Gnd 5V Mouse Clock N C Jumper J10 External Battery Connector Pin 1 2 3 4 Function Battery 3 6V NC Ground G...

Page 64: ...entiumTM OverDrive Ready System Board Power Connector PL1 and PL2 Connectors PL1 PL2 Pin 1 2 3 4 5 6 1 2 3 4 5 6 Function Power Good 5V 12V 12V Ground Ground Ground Ground 5V 5V 5V 5V G 5 u Appendix G...

Page 65: ...65535 981 17 112MB 10 820 3 65535 828 17 20MB 11 855 5 65535 855 17 35MB 12 855 7 65535 855 17 50MB 13 306 8 128 319 17 28MB 14 733 7 65535 733 17 43MB 16 612 4 0 663 17 20MB 17 977 5 300 977 17 41MB...

Page 66: ...7 43MB 34 612 2 128 612 17 10MB 35 1024 9 65535 1024 17 77MB 36 1024 8 512 1024 17 68MB 37 615 8 128 615 17 41MB 38 987 3 987 987 17 25MB 39 987 7 987 987 17 57MB 40 820 6 820 820 17 41MB 41 977 5 977...

Page 67: ...486 OCV Plus System Board User s Manual 21840429...

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