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Intel CH-486-33A, User Manual

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Intel CH-486-33A User Manual Download Page 11

2-3. DRAM Bank Configuration

The 

 supports 2 banks of 

 mode local

memory, DRAM devices are either 

 

 or 4Mb large.

Total memory is between 

 and 32MB. The following table

illustrates the configuration supported.

Bank 0

 Bank 1

 Total

256K

 2MB

5MB

 

 16MB

 

 

 

 

 

 

4 M

 32MB

 Use 

 DRAM

Hardware Description

Summary of Contents for CH-486-33A

Page 1: ...CH 486 33A User s Manual ...

Page 2: ... __ _ _ _ ___ ____________ IBM PC XT AT PS 2 are registered trademarks of International Business Machines Corporation AMI is a trademark of American Megatrends inc 486 is a trademark of Intel Corporation Other brand and product name or trademarks and or registered trademarks of respective companies ...

Page 3: ... 2 3 I DRAM Bank Configuration 2 4 SRAM Configuration 3 BIOS Setup 31 3 2 I 3 3 3 4 3 5 I 3 6 37 38 1 I I BIOS Overview 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 ...

Page 4: ...rdler DBC tl The 82C206 Integrated Peripheral Controller IPC l l CH 486 33A Mainboard Specification II 33 MHz INTEL 80486 DX CPU OR 20125 MHz INTEL 80486 SX CPU ISA architecture Copy Back Direct Mapped Cache with size of 64KB or 256 KB selectable Up to 32 MB of local high speed page mode DRAM memory space DRAM TYPE support 256K i M 4MB Control of two non cacheable regions Shadow RAM support Option...

Page 5: ...r socket on board On board rechargeable battery back up for CMOS configuration and real time dock Optimized for OS 2 window 386 window 3 0 XENIX UNIX software operation Baby AT size with XT AT mounting hole l 2 lntroductlon ...

Page 6: ...nt control unit is exactly the same as the 387 math coprocessor Software written for the 387 math coprocessor will run on the on chip floating point unit without any modification It occupies I O address range of 8OOOOOFOH SOOOOOFFH and operates in parallel with the arithmetic and logic unit and provides arithmetic instructions for a variety of numeric data types On chip Cache Memory The 8KB on chi...

Page 7: ...h the 80486 over the same address bus tklt connects the main memory to CPU The coprocessor will respond to memory addresses COOOOOOO1 i through CIFFFFFFH Writing to this ddrcss space will cause the 4 107 to execute this fractions coprocessor to drive the and reading from it will cause the data bus 2 2 Connector and Jumper Settings This chapter describes the CH 486 33A main bo rrd s jumpers and con...

Page 8: ... 1 JPll I I WEITEK 82c4w 4167 1 DRAMBank 30 DRAMBank I J23 il 324 d Wl SW2 0JP12 Hardware Description 2 3 ...

Page 9: ...onnector sw2 Hardware Turbo Switch Connector Jl Keyboard Connector JlO External Battery Connector Jll J12 Power Connector J23 Keylock and Power LED Connector J24 Speaker Connector JP12 Turbo LED Connector 2 4 Hardware Description ...

Page 10: ...0X 13Upen 4BSX _ I 1 JP6 JP7 CPU selectable CPU selectable I Short 486 OX 487SX J Open 486 SX JP8 1 Cache i28 Sdetctabl8 _ _ Short 256K pen 64K Jp9 JPlO JPll Cache size selectable Cache size selectable Short 256K IOpen 64K Always Open Short 256K IOpen 64K NOTE 1 TItose enclosed in box ate Mainboard Default 2 This Mainbmud mly supput Intel C u Iater stepping cfpracesscx Hardware Description 2 5 ...

Page 11: ...her 256Kb 1Mb or 4Mb large Total memory is between 1MB and 32MB The following table illustrates the configuration supported Bank 0 1 Bank 1 1 Total 256K I I 1MB 256K I256K 1 2MB 256K 1M 5MB i8MB I 1 4M I 1 16MB I I lfvl I 4M I20MB 1 I 4M I lM I2OMB I I 4M I 4M 1 32MB I Use 80ns DRAM 2 6 Hardware Description ...

Page 12: ...e following table shows the TAG RAM size cache RAM size and cacheable main memory size supported by CH 486 33A Cache size KB 64K TAG RAM size Cache Cacheable main RAM size memory 8Kx 8bit U34 8K x 8bit 16MB 64K x lbit U33 u47 U49 us1 us5 256K 32K x 8bit U34 32K x 8bit 32MB 64K x 1 bit U33 u47 U49 us1 us5 Note If you waut to charge secortd Ier el cache size you mrst change the SRA M arid TAG RAM si...

Page 13: ...he default values stored in the ROM file There are two 2 sets of BIOS values stored in the ROM file tl The BIOS Setup default values n 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 for the syst...

Page 14: ... 1 Whenever BIOS detects any equipment error or the CMOS contents are not consistent with the equipment 2 After the power on memory test the screen will show Hit DEL If you want to run setup Press the DEL key to get the following screen 3 2 BIOS SETUP ...

Page 15: ...TH 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 I 1 l Sel F2 F3 Color FlO Save Exit L ____ ____ __ _ _ ___ _ __ _ _______ _ ___ _ ___ Explanation of keys FCC Exit to setup program Arrow keys Cursor movement F2 F3 Change Color FlO Save Setup values it to setup program BIOS SETUP 3 ...

Page 16: ...erved _ _ _ _ Improper Use of Setup may Cause Problems If System Hangs Reboot System and Enter Setup by pressing the DEL key Do any of the following After Entering Setup i Alter options to make system work ii Load BIOS Setup Defaults iii Load Power On Defaults Hit ESC to stop now Any other key to Continue Figure 3 BIOS Setup Warning Message Explanation of keys ESC Exit to previous screen Any keys ...

Page 17: ...m 1 to 46 or he can choose type 47 which is the user defineable 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 Floppy drive A and Floppy drive B 360KB 5 25 1 2MB 5 25 720KB 3 5 1 44MB 3 5 Not Installed Primary Display Monochrome Color 40 x 25 VGA PGA EGA Color 80x25 Not Ins...

Page 18: ...disk D type Not Installed Floppy drive A 1 2 MB 5 25 Floppy drive B Not Installed Primary display VGA PGA FGA Key board Installed BIOS SETUP PROGRAM STANDARD CMOS SEI UP C 1990 American Megatrends Inc All Rights Reserved Month Jan Feb Dec Date 01 02 03 31 Year 1901 1902 2099 ESC Exit 1 1 Select F2 F3 Color PU PD Modify 1 SUN 1 MON 1 TUE 1 WED 1 THU 1 SAT ___________ _ _ _ __ _ 3 6 BIOS SETUP ...

Page 19: ...ble Otherwise set field to Disabled Note that in general nothing will be immediately observable by setting the field to either state Eg Daylight Savings Enable Daylight Savings Disable On the lcrrt Sun y April the time increments frm 1 59 59 am to 3 00 00 am On thelast Sunday in October when the time first reaches 1 59 59 am it is rdled barck to 1 OO OO am BIOS SETUP 3 7 ...

Page 20: ...P option is used to set the various system options for the user The user can get various options some of which are listed below n Weitek Processor Ll External Cache Memory CI Internal Cache Memory II Adaptor ROM Shadow II Shadow RAM 3 8 BIOS SETUP ...

Page 21: ...w D400 16K Adaptor ROM Shadow D800 16K Adaptor ROM Shadow DCOQ 16K Adaptor ROM Shadow EOOO 16K Adaplor ROM Shadow E400 16K Adaptor ROM Shadow E800 16K Adaptor ROM Shadow ECOO 16K Shadow RAM Option Absent Enabled Enabled Disabled Disabled Disabled Disabled Disabled Disabled Disabled Disabled Disabled Disabled Disabled L __________ LI ______ I ESCExit I l 1 Sel Ctrl Pu Pd Modify F 1 Hslp F27F3 Color...

Page 22: ... the old values These are the 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 Pow...

Page 23: ...up enable disable CPU Internal cache 8 KB Adaptor RAM Shadow Adaptor Shadow RAM address range from C8000H to EFFFFH each Block size at 16KB for enable or disable Shadow RAM There are four function that can be selected Video Video shadow COOOO C7FFFH Main Main BIOS shadow FOOOO FFFFFH both Video and Main BIOS Shadow Disable Disable shadow BIOS SETUP 3 11 ...

Page 24: ...less than 10 available answers then Ctrl PageUp is same as PageUp and CtrlPageDown is same as PageDown Fl Help for the option F2 F3 Change Color F5 Get the old values These 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 Set...

Page 25: ...on Cacheable Block 1 Size Disabled Non Cacheable Block l Base OKB Non Cacheable Block 2 Size Disabled Non Cacheable Block 2 Base OKB Cacheable RAM Address Range 8MB Video BIOS Area Cacheable Y8S ESC Exit f _ _ 1 Sel Ctrl Pu Pd Modify Fl Help F2 F3 Color F5 Old Values F6 BIOS Setup Defaults R Power On Defaults II BIOS SETUP 3 l 3 ...

Page 26: ...tarting address for example if a 512KB non cacheable block is selected its starting address is a multiple of 512KB Cacheable RAM Address Range This Cacheable DRAM size you can select from range l 64MB Video BIOS Area Cacheable Enable or Disable Video BIOS Cacheable Please check your VGA card If OAK VGA card slow speed this function must disable 3 l 4 BIOS SETUP ...

Page 27: ...UTO CONFIGURATION WlTH BIOS DEFAULTS AUTO CONFIGURATION WlTH POWER ON DEFAULTS 1 Load BIOS Setup Default Values from ROM Table Y N N 1 Load BIOS Setup Defaullt Values for Advanced CMOS and Advanced CHIPSET Setup ESC Exit 1 1 Sel FZIF3 Color FlO Save Exit r Press Y or N to change ADVANCED CMOS SETUP and ADVANCED CHIPSET SETUP with BIOS default values I Note Tote BIOS default values setup chipset re...

Page 28: ...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 ESCExit I__ I _ Sel FYF3 Color F1O Save Exit Press Y or NW to change ADVANCED CMOS SETUP and ADVANCED CHIPSET SETUP with Power on default values I Note 77le Power 011 default values setup chipset ...

Page 29: ... set Setup and the New Password if it has been changed are stored in the CMOS The CMOS checksum is calculated and written 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 ...

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