CH-386-33A/40A User%
Contents
1. mud e eS ce D Lr AS DM r E vei eol Ct ie Tak Mainboard User s Manual pp FASE RETURN TO TECH LIBRARY AL ioe Nec Luis ip Rs t CH 386 33A 40A 386 33 40 Mainboard User s Manual 1 st Edition Nov 1991 IBM PC XT AT PS2 are registered trademarks of International Business Machines Corporation AMI is a trademark of American Megatrends Inc 386 is a trademark of Intel Corporation Opti is a trademark Opti Inc Other brand and product names are trademarks and or registered trademarks of their respective companies Chapter 1 A AA E O 4 1 PCT 1 2 Mainboard Specification l l 1 3 Cache Control Subsystem 1 2 1 4 Local DRAM Control Subsystem 1 3 Chapter Numam Contiguration dees 2 1 2 1 Connector and Jumper Settings 2 1 Chapter 3 3t BIOS SelUD 2324 oS e a IAE k ted 3 1 3 BIOS Overview 3 1 3 2 Standard CMOS Setup 3 5 3 3 Advanced CMOS Setup 3 8 3 4 Advanced Chipset Setup 3 12 3 5 Auto Configuration With BIOS Defaults 3 15 3 6 Auto Configuration With Power On Defaults 3 16 3 9 Write To CMOS And Exit 3 17 1 Introduction The OPTI 386 write back is a highly integrated PC AT VLSI chipset fo2. 16Kx4bit 32Kx8bit U32 U33 U42 U34 U37 U43 U46 1 2 Introduction 1 4 Local DRAM Control Subsystem This mainboard support 2 bank page mode local memory DRAM devices can be 256K 1 M or 4M and total memory can be up to 32MB The following table on the next page illustrates the configurations supported fast page mode 80ns DRAM is used For example Fuji MB81256 80 does not support fast page mode timing Upon booting the system will appear parity error message when using the DRAM Introduction 1 3 2 Configuration of the Mainboard 2 1 Connector and Jumper settings The following is a description of jumpers and connectors of the CH 386 33A 40A mainboard C a J12 JP8 80386DX 10 ps JP7 JP5 6 as f J23 r 82C391 82C392 2 Lc xp we SW1 JP4 Mainboard 2 1 Ji Keyboard Connector 10 External Battery Connector m J11 Power Connector P8 m Ji2 Power Connector P9 m J23 Keylock amp power LED connector m J24 Speaker connector m JP1 CRT TYPE Jumper open monochrome monitor short color monitor m JP2 CMOS Jumper 1 2 clear CMOS memory 2 3 normal operation mg JP3 AT Bus clock selectable jumper open AT Bus clock is CPU clock divided by 6 short AT Bus clock is CPU clock divided by 8 for 33MHz only 40MHz always 8MHz m JP4 Turbo LED m SW1
3. Hardware RESET switch connector SW2 Hardware TURBO switch connector m 5 JP6 JP7 JP8 JP9 JP10 cache jumper vrs we are 2 pape ete tee OPEN 128K SHORT 256K SHORT 2 2 Mainboard Notes Cache even bank U34 U35 U36 U37 Cache odd bank U43 U44 U45 U46 Tag RAM U32 U33 U42 32K cache put 8Kx8 SRAM at even bank 4Kx4 SRAM at U32 U33 and U42 64K cache put 8Kx8 SRAM at both even amp odd bank 4Kx4 SRAM at U32 U33 and U42 128K cache put 32Kx8 SRAM at even bank 16Kx4 SRAM at U32 U33 and U42 256K cache put 32Kx8 SRAM at both even amp odd bank 16Kx4 SRAM at U32 U33 and U42 TAG RAM access time is 15ns cache RAM access time is 25ns for 33MHz or 20ns for 40MHz Main Board Mainboard 2 3 3 BIOS SETUP 555505556 3 1 BIOS OVERVIEW The SETUP program is used to configure the system This system options are stored in the CMOS If the CMOS is good the system is configured with the values stored in the CMOS If the CMOS is bad the system is configured with the default values stored in the ROM file There are two 2 sets of BIOS values stored in the ROM file e The BIOS Setup defualt values e The Power On default values The BIOS Setup default values are the default values which are supposed to give optimum performance for the system They are the best case default values The Power On default values are the default values for the table values f
4. Shadow ROM Shadow ROM Shadow ROM Shadow ROM Shadow C11990 American gatrends Inc Ail Rights Reserved Numeric Processor Test C800 16K CCO00 16K 0000 16K D400 16K D800 16K DC00 16K E000 16K E400 16K E800 16K ROM Shadow 16 Shadow RAM Option ESC Exit F5 Old Values Disabled Absent Enabled Disabled Disabled Disabled Disabled Disabled Disabled Disabled Disabled Disabled Disabled Both Sel Ctri Pu Pd Modify F1 Help F6 BIOS Setup Defaults BIOS Setup F7 Power On Defaults 3 9 S e ESC Exit to previous screen e Arrow keys Cursor movement PageUp PageDown Ctrl PageUp Ctrl PageDown Modify the value of the option by 1 1 10 10 If the option has less than 10 available answers then lt Ctrl PageUp gt is the same as lt PageUp gt and lt Ctrl PageDown gt is the same as lt PageDown gt e Fi Option for Help e F2 F3 Change Color e F5 Get the old values These are values with the user starting from the current session If the CMOS was good then the old values are the CMOS values hense they are the BIOS Setup default values F6 This will load all the options in the Advanced CMOS Setup Advanced Chipset Setup with the BIOS setup defaults F7 This will load all the options in the Advanced CMOS Setup Advanced Chipset Setup with the Power On defaults 3 10 BIOS S
5. New password If it has been changed are stored in the CMOS The CMOS checksum is calculated and writtten into the CMOS After that control is passed back to the BIOS 3 10 DO NOT WRITE TO CMOS AND EXIT Control is passed back to the BIOS without writing to the CMOS BIOS Setup 3 17
6. Setup i Alter options to make system work ii Load BIOS Setup Defaults Load Power On Defaults Hit lt ESC gt to stop now Any other key to Continue M Figure 3 BIOS Setup Warning Message Explanation of keys ESC Exit to previous screen Any keys Continue choosing setup program 3 4 BIOS Setup 3 2 STANDARD CMOS SETUP This Option is used to configure the following options X Date Month Date and Year X Time Minute and Second X Daylight Saving Disabled or Enabled x Hard Disk C and Hard Disk D The User can choose any of the standard hard disk types from 1 to 46 or he can choose type 47 which is the user definable type The User must enter the hard disk parameters if he wants to choose the user definable hard disk type per drive i e type 47 may be different for drive C and for drive D X Floppy Drive A and Floppy Drive B 360 KB 5 25 1 2 MB 5 25 720 KB 3 5 1 44 MB 3 5 Not Installed X Primary Display Monochrome Color 40 x 25 VGA PGA EGA Color 80 x 25 Not Installed X Keyboard Installed or Not Installed BIOS Setup 3 5 BIOS SETUP PROGRAM STANDARD CMOS SETUP C 1990 American Megatrends Inc All Rights Resewed Date mm date year Wed Jun 05 1991 Base memory 640KB Time hour min sec 15 35 50 Ext memory 7168KB Daylight Saving Disabled Heads WPcom LZone Sect Size Hard Disk C Type Not Installed Ha
7. etup O Numeric Processor Test INTEL Coprocessor insert in socket Enable is set When not inserted Disable is set WEITEK Processor WEITEK coprocessor insert in socket present is set When not inserted in socket absent is set Cache Memory This function can be setup Enable Disable External Cache 32 64 128 256KB L Adaptor RAM Shadow Adaptor Shadow RAM address range from C8000H to EFFFFH each block size at the 16KB for Enable or Disable O Shadow RAM There are four functions that can be selected Video Video shadow C0000 C7FFFH Main Main BIOS shadow FOOOO FFFFFH Both Video and Main BIOS shadow Disable Disable shadow BIOS Setup 3 11 3 4 ADVANCED CHIPSET SETUP The ADVANCED CHIPSET SETUP option is used to change the register values for the chipset registers The chipset registers control most of the system options in the computer BIOS SETUP PROGRAM ADVANCED CMOS SETUP C 1 990 American Megatrends Inc All Rights Reserved 3 12 Non Cacheable block I Base Disabled Non Cacheable block l Size 0KB Non Cacheable block 2 Base Disabled Non Cacheable block 2 Size 0KB Cacheable RAM Address Range 8 MB Video BIOS Area Cacheable Yes ESC Exit gt f Sel CtrjPu Pd Modify F1 Help F2 F3 Color F5 Old value F6 BIOS Setup Defaults F7 Power on Defaults BIOS Setup Explanation of keys ESC Exit to previous screen Arrow keys Curso
8. n will be as follows BIOS SETUP PROGRAM AMI BIOS SETUP UTILITIES C 1990 American Megatrends Inc All Rights Reserved STANDARD CMOS SETUP ADVANCED CMOS SETUP ADVANCED CHIPSET SETUP AUTO CONFIGURATION WITH BIOS DEFAULTS AUTO CONFIGURATION WITH POWER ON DEFAULTS Load BIOS Setup Default Values from ROM Table Y N N Load BIOS Setup Defaullt Values for Advanced CMOS and Advanced CHIPSET Setup 5 t Sel F2 Fa Color F1l0 Save amp Exit Press Y or N to change ADVANCED CMOS SETUP and ADVANCED CHIPSET SETUP with BIOS default values BIOS Setup 3 15 3 6 AUTO CONFIGURATION WITH POWER ON DEFAULTS When you enter AUTO CONFIGURATION WITH POWER ON DEFAULTS the screen will be as follows BIOS SETUP PROGRAM AMI BIOS SETUP UTILITIES C 1990 Amertean Megatrends Inc All Rights Reserved STANDARD CMOS SETUP ADVANCED CMOS SETUP ADVANCED CHIPSET SETUP AUTO CONFIGURATION WITH BIOS DEFAULTS AUTO CONFIGURATION WITH POWER ON DEFAULTS Load Power On Default Values from ROM Table Y N N Load Power On Default Values for Advanced CMOS and Advanced CHIPSET Setup ESC Exit sel F2 F3 Color F10 Save amp Exit Press Y or N to change ADVANCED CMOS SETUP and ADVANCED CHIPSET SETUP with Power On default values 3 16 BIOS Setup 3 9 WRITE TO CMOS AND EXIT The options set in the Standard Setup Advanced Setup Advanced Chipset Setup and the
9. or the system They are the worst case default values BIOS Setup There are two ways to enter the BIOS setup program e Whenever BIOS detects any equipment error or the CMOS contents are not consistent with the equipment e After the power on memory test the screen will show Hit lt DEL gt If you want to run setup Press the DEL key to get the following screen on the next page 3 2 BIOS Setup BIOS SETUP PROGRAM AMI BIOS SETUP UTILITIES C 1990 American Megatrends Inc All Rights Reserved STANDARD CMOS SETUP ADVANCED CMOS SETUP ADVANCED CHIPSET SETUP AUTO CONFIGURATION WITH BIOS DEFAULTS AUTO CONFIGURATION WITH POWER ON DEFAULTS WRITE TO CMOS AND EXIT DO NOT WRITE TO CMOS AND EXIT Standard CMOS Setup for changing Time Date Hard disk type etc ESC Exit Joe Sel F2 F3 Color F10 Save amp Exit Explanation of keys ESC Exit to setup program Arrow keys Cursor movement F2 F3 Change Color F10 Save Setup values amp Exit to setup program BIOS Setup 3 3 The User is given a warning message before he is allowed to change any of the setup parameters The warning message is shown as follows BIOS SETUP PROGRAM WARNING INFORMATION C 1990 American Megatrends Inc All Rights Reserved Improper Use of Setup may Cause Problems 1 If System Hangs Reboot System and Enter Setup by pressing the lt ESC gt key Do any of the following After Entering
10. r movement PageUp PageDown Ctrl PageUp Ctrl PageDown Modify the value of the option 1 1 10 10 If the option has less than 10 available answers then lt Ctrl PageUp gt is the same as lt PageUp gt and lt Ctrl PageDown gt is the same as lt pageDown gt F1 Option for Help F2 F3 Change Color e F5 Get the old values This are the values with the user starting from the current session If the CMOS was good then the old values are the CMOS values hence they are the BIOS Setup default values F6 This will load all the options in the Advanced CMOS Setup Advanced Chipset Setup with the BIOS Setup defaults F7 This will load all the options in the Advanced CMOS Setup Advanced Chipset Setup with the Power On defaults BIOS Setup 3 13 Non Cacheable Block Size This setup for set Non Cacheable block size of 64 128 256 51 2K Disable O Non Cacheable Block Base This setup for set Non Cacheable block starting address for example if a 512KB non cacheable block is selected its starting address is a multiple of 512KB LD Cacheable RAM Address Range This Cacheable DRAM size you can select from range 1 64MB O Video BIOS Area Cacheable Enable or Disable Video BIOS Cacheable Please check you VGA card If OAK VGA card slow speed this function must disable 3 14 BIOS Setup 3 5 AUTO CONFIGURATION WITH BIOS DEFAULTS When you enter AUTO CONFIGURATION WITH BIOS DEFAULTS the scree
11. r the high end 386 based AT systems It includes system controller SYSC 82C391 Data Buffer controller DBC 82C392 and integrated peripheral controller 82C206 1 2 Mainboard Specification 33MHz 40MHz 80386 DX CPU 80387 WEITEK 3167 Socket on board Coprocessor supports SYNC mode only Copy Back Direct Mapped Cache with size of 32 64 128 256KB 16 bytes Line size for cache miss cyde Support 256K 1M 4M DRAM Type Up to 32M B Local fast page mode DRAM memory space Supports Two Non cacheable Regions Control Shadow RAM support Option for Cacheable video BIOS Supports H ardware software switch operation for Turbo slow speed Supports AT bus clock selectable Introduction B W Two 8 bit and Six 16 bit expansion slots W On board rechargeable battery backup for CMOS configuration and real time clock gm Optimized for OS Z XENIX WINDOWS 386 software operation 1 3 Cache Control Subsystem The Cache Control is Copy Back Direct Mapped Cache with size of 32 64 128 256KB selectable the cache has been designed to operate at non pipeline mode and support line size of 16 bytes during cache Read miss cycle for update cache memory Data The following table on the next page shows the cache sizes support Tag RAM used cacheable main memory size TAG CACHE CACHEABLE SIZE TAG SIZE CACHE 4Kx4bit 8Kx8bit U32 U33 U42 U34 U35 U36 U37 4Kx4bit 8Kx8bit U32 U33 U42 U34 U37 U43 U46 f 16Kx4bit 32Kx8bit U32 U33 U42 U34 U35 U36 U37
12. rd Disk D Type Not Installed Floppy Drive 1 2MB 5 25 Floppy Drive B Not Installed Primary display VGA PGA EGA Keyboard Installed Sun Mon Tue Wed Thu Fri Sat 27 28 129 30 131 1 f Sel F2 F3 Color Pu Pd Modify 3 6 BIOS Setup Note Daylight Saving The RTC has a built in capability to automatically adjust the time on the two daylight savings days of the year If this is desired set the field to Enable Otherwise set field to Disabled Note that in general nothing will be immediately observable by setting the field to either state e Daylight Savings Enable Dayligh t Savings Disable On the last Sunday of April the time increments from 1 59 59 am to 3 00 00 am On the last Sunday in October when the time first reaches 1 59 59 am it is rolled back to 1 00 00 am BIOS Setup 3 7 3 3 ADVANCED CMOS SETUP The ADVANCED CMOS SETUP option is used to set the various system options for the user The User can get various options some of which are listed below X Numeric Processor Test r Weitek Processor Cache Memory X Adaptor ROM Shadow H Shadow RAM 3 8 BIOS Setup BIOS SETUP PROGRAM ADVANCED CMOS SETUP Weitek Cache Adaptor Adaptor Adaptor Adaptor Adaptor Adaptor Adaptor Adaptor Adaptor Adaptor Processor Memory ROM Shadow ROM Shadow ROM Shadow ROM Shadow ROM
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