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S1468-001-01

Reset Connector: J49

Pinout Assignment
1

Power Goood

Ground

Turbo LED Connector: J50

Pinout Assignment
1

Cathode

Anode

Flash EPROM: J42, J43 and J44

These jumpers should be left at the factory default.

J42

1-2

J43

1-2

J44

1-2

Voltage Regulator: J35, J36, J37, J38, J39, J40, J26 and J27.
Ignore these setting if your board has these jumpers hardwired.

Do not change these jumpers!
CPU can be damaged if these are set incorrectly.

J35 J36 J37 J38 J39 J40 J26 J27

STD Off Off On Off Off On On On
STD/VRE/VR Off On Off Off On Off On On Default
VRE On Off Off On Off Off On On

STD/VRE will work with most Pentium CPUs

Infra Red Interface: Con9 and Con10

Pinout Assignment
1

Signal In

Gnd

Signal Out

VCC

Summary of Contents for S1468

Page 1: ...OS Password Reset 13 3 10 DRAM Installation 14 3 11 CPU Installation 15 3 12 Upgrading Cache Memory 16 3 13 Understanding Different Clock Speeds 17 3 14 Peripheral Device Installation 18 3 15 Turbo Non Turbo hotkeys 18 3 16 Connecting The Power Supply 19 4 BIOS Configuration 21 4 1 Entering Setup 21 4 2 Control Keys 22 4 3 Getting Help 23 4 4 The Main Menu 23 4 5 Standard CMOS Setup Menu 25 4 6 BI...

Page 2: ... 1 2 PCI Bus Slot Pin Out 57 7 2 Timer DMA Channel Map 58 7 3 Interrupt Map 58 7 4 RTC CMOS Ram Map 59 Appendix A Post Codes 60 Information presented in this publication has been carefully checked for reliability however noresponsibilityisassumedforinaccuracies The informationcontainedinthisdocumentissubjecttochangewithout notice Trademarks Award BIOS Flash are trademarks of Award Software Interna...

Page 3: ...bility and yet is small enough for all of its features to be supported in a Baby AT form factor Some of the features included are on board dual channel PCI IDE on board floppy controller on board high speed I O and support for either pipeline burst or standard asynchronous SRAM Flexibility and expandibility have been designed into the S1468 With I O and drive controller support built on board the ...

Page 4: ...rd 2nd level cache memory Supports either synchronous pipeline burst or standard asynchronous SRAM wEIDE Controller Primary and secondary PCI EIDE channels on board for support of up to four EIDE Mode 0 through Mode 4 drives wEnhanced I O Multi mode bi directional parallel port that supports standard EPP and ECP modes Supports 16550 compatible Uarts for on board high speed serial ports Support for...

Page 5: ...included Support for easy BIOS upgrades with flash EPROM chip wO S Operates with MS DOS Windows 3 x Windows for Work Group 3 x Windows 95 Windows NT OS 2 Novell Netware Novell UnixWare and SCO Unix 1 3 Environment Ambient Temperature 0 to 50 C operating Relative Humidity 0 to 85 operating Altitude 0 to 10 000 feet operating Vibration 0 to 1 000 Hz Voltage 4 9 to 5 2 V ...

Page 6: ...unded anti static mat The operator should be wearing an anti static wristband grounded at the same point as the anti static mat Inspect the main board carton for obvious damage Shipping and handling may cause damage to your board Be sure there are no shipping and han dling damage on the board before proceeding After opening the mainboard carton extract the system board and place it only on a groun...

Page 7: ... 2 2 Installation You are now ready to install your mainboard The mounting hole pattern of the S1468 matches the IBM AT system board spec It is assumed that the chassis is designed for a standard IBM XT AT mainboard ...

Page 8: ...5 Bank 0 Bank 0 82371FB Floppy Con Com1 Com2 COAST Module Socket 7 Keyboard CON J6 J5 J4 J9 J33 J34 J32 J30 J28 J29 J31 J35 J36 J37 J38 J39 J40 J26 J27 J24 Clock Gen J23 BIOS AMI AWARD RTC J41 J43 J44 J42 J25 J14 J20 J21 J16 J15 J19 J22 J18 J17 CPU Parallel Port J1 J2 J12 J11 J46 J50 J49 J45 J48 J47 pin 1 pin 1 pin 1 pin 1 pin 1 pin 1 J13 Tag RAM 82438FX 82438FX J51 J52 Con9 Con10 pin 1 PS 2 Mouse...

Page 9: ...these are set incorrectly Volts J1 J2 J9 J11 J4 J5 J6 Default 5V On On On On Off Off Off 3 3V Off Off Off Off On On On Cache Size Size J13 512KB 1 2 256KB 2 3 On Board Cache Used to specify type of cache being used J28 J29 J30 J31 Size 2 3 1 2 2 3 1 2 512KB 1 2 2 3 2 3 1 2 256KB 1 2 1 2 1 2 1 2 COAST Module CMOS Reset J41 Off Normal operation Default On Clears password and resets CMOS wWith power ...

Page 10: ...peaker Connector J45 Pinout Assignments 1 Speaker out 2 Ground 3 Ground 4 5V Keylock Connector J46 Pinout Assignments 1 Led Output 2 No Connect 3 Ground 4 Keylock 5 Ground Turbo Switch J47 Open for Turbo Close for Non Turbo HDD LED J48 Only pins 1 and 2 are used Pinout Assignments 1 Cathode 2 Anode ...

Page 11: ...lator J35 J36 J37 J38 J39 J40 J26 and J27 Ignore these setting if your board has these jumpers hardwired Do not change these jumpers CPU can be damaged if these are set incorrectly J35 J36 J37 J38 J39 J40 J26 J27 STD Off Off On Off Off On On On STD VRE VR Off On Off Off On Off On On Default VRE On Off Off On Off Off On On STD VRE will work with most Pentium CPUs Infra Red Interface Con9 and Con10 ...

Page 12: ...n your case may have a turbo switch to control system speed when slower program execution is required for software developed in the old XT days You can connect the chassis turbo switch to J47 on the mainboard The Triton chipset doesn t support a hardware turbo function so this switch will only turn on or off the turbo LED You need to use the hot key of Ctrl Alt for slow speed and Ctrl Alt for high...

Page 13: ...ep J42 J43 and J44 determines which type of EPROM is used These jump ers have been set to match the on board BIOS chip The factory default for the S1468 is on pins 1 2 Depending on the type of EPROM used some boards will have J42 on pins 2 3 Refer to chapter 6 for Flash EPROM upgrade procedures 3 9 Hardware CMOS Password Reset The following steps are valid provided the board has a DS12887A RTC If ...

Page 14: ... mainboard supports 1 2 4 and 8MBx32 SIMMS wBank 0 only supports single sided SIMMs wBank 1 and 2 can use either double or single sided SIMMs wTwo SIMMs must be installed in any bank for the system to POST wThe table below shows some of the available memory configurations Bank 1 Bank2 Bank0 Total Memory 1MBx32 none none 8MB 1MBx32 1MBx32 none 16MB 1MBx32 1MBx32 1MBx32 24MB 2MBx32 none none 16MB 2M...

Page 15: ...is is normal and will not damage the CPU When the CPU is installed the lever should snap into place at the side of the socket 3 11 CPU Installation Several types of CPUs 75 thru 166 MHz can be used on S1468 Please refer to the previous pages for the correct CPU jumper settings for your board w The CPU is a sensitive electronic component and it can be easily damaged by static electricity Do not tou...

Page 16: ...enable the COAST Moduel you must set the jumpers to pins 1 2 for J28 J29 J30 and J31 wRefer to page 9 for the cache jumper settings wWhen using the COAST Module the standard SRAM sockets must be empty and the Tag RAM socket must be empty wThe COAST Module pipline burst cache unit comes in either 256KB or 512KB sizes and has a built in Tag RAM chip wThe COAST Module will only fit in the Coast Socke...

Page 17: ...ck Clock 75 MHz 50 MHz 25 MHz 90 MHz 60 MHz 30 MHz 100 MHz 66 67 MHz 33 MHz 120 MHz 60 MHz 30 MHz 133 MHz 66 67MHz 33 MHz 150 MHz 60 MHz 30 MHz 166 MHz 66 67 MHz 33 MHz In the table above the 50 60 and 66 67 MHz figures are oscillator speeds that establish the external clock speed The PCI Bus clock speed is fixed at one half of the mainboard clock speed The 150MHz Pentium when set for 2 5x mode wi...

Page 18: ...any other peripheral devices If a PCI Bus interface card is to be installed in the system any one of the four PCI Bus slots can support either a Master or a Slave device After installing the peripheral controller the user should check everything press Ctrl Alt turn off turbo function press Ctrl Alt turn on turbo function again and prepare to power on the system 3 15 Turbo Non Turbo hotkeys ...

Page 19: ...CC VCC 5 volt power connector pinout Pin 1 To connect the leads from either voltage power supply you should first make sure the power supply is unplugged Most power supplies have two leads Each lead has six wires two of which are black Orient the connectors so the black wires are in the middle of the 5V power supply Caution Some power supplies also include 3V connectors The connection wires normal...

Page 20: ...heir receptacles on the mainboard You may need to hold the lead at an angle to line it up Once you have the guide pins aligned press the lead connector so that the plastic clips on the lead snap into place and secure the lead to the connec tor Connecting 5V power supply ...

Page 21: ...ower 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 the message disappears before you respond and you wish to enter Setup restart the system by turning it OFF then ON or by pressing Reset on the system case You may also restart by simultaneously pressing Ctrl Alt and Del keys If you do not press the keys at the c...

Page 22: ...eral help only for Status Page Setup menu and Option Page Setup Menu F2 key Change color from a total of 16 colors F3 key Calendar only for Status Page Setup Menu F4 key Reserved F5 key Restore the previous CMOS value only for Option Page Setup Menu F6 key Load defaults F8 key Reserved F9 key Reserved F10 key Save all CMOS changes only for Main Menu ...

Page 23: ...OS Setup Utility the Main Menu Figure 4 1 will appear on the screen The Main Menu allows you to select from the eight setup functions and 2 exit choices Use the arrow keys to select among the items and press Enter to accept or enter the sub menu Figure 4 1 Main Menu ROM ISA BIOS 2A59CT51 CMOS SETUP UTILITY AWARD SOFTWARE INC ESC Save Exit Setup F10 Quit Shift F2 Change Color Select Item Time Date ...

Page 24: ...system power management options w w PCI slot configuration This setup page allows you to modify the configuration of PCI slot paramters w w Load setup defaults BIOS defaults indicate the most appropriate values of each system param eter for your system w w Password setting Change set or disable password It allows you to limit access to the system and Setup w w IDE HDD auto detection Automatically ...

Page 25: ... 0 0 0 Primary Slave none 0mb 0 0 0 0 0 Secondary Master none 0mb 0 0 0 0 0 Secondary Slave none 0mb 0 0 0 0 0 Drive A 1 44 M 3 5 in Drive B 1 2 M 5 25 in Video EGA VGA Halt On All errors 4 5 Standard CMOS Setup Menu The items in Standard CMOS Setup Menu Figure 4 2 are divided into 9 categories Each category includes one or more setup items Use the arrows to highlight the item and use the PgUp or ...

Page 26: ...ive type This category identifies the types of hard disk drives that have been in stalled in the computer There are 46 predefined types and a user definable type Press PgUp or PgDn to select a numbered hard disk type or type a number and press Enter Note that the specifications of your drive must match with the drive table The hard disk will not work properly if you enter improper information for ...

Page 27: ...r the system will be stopped and you will be promted All errors The system boot will not be stopped for any errors that are detected All but Keyboard The system boot will not stop for a keyboard error it will stop for all other errors All but Diskette The system boot will not stop for disk errors it will stop for all other errors All but Disk Key The system boot will not stop for a keyboard or dis...

Page 28: ...ch conventional memory free for application programs as possible 4 6 BIOS FEATURES SETUP ROMISABIOS BIOSFEATURESSETUP AWARDSOFTWARE INC Video BIOS Shadow Enabled C8000 CBFFF Shadow Disabled CC000 CFFFF Shadow Disabled D0000 D3FFF Shadow Disabled D4000 D7FFF Shadow Disabled D8000 DBFFF Shadow Disabled DC000 DFFFF Shadow Disabled Virus Warning Enabled CPU Internal Cache Enabled External Cache Enable...

Page 29: ...ning message to appear when anything attemps to access the boot sector or hard disk partition table w w CPU Internal Cache External Cache These two categories speed up the memory access However it de pends on the CPU Chipset design Default value is Enabled Enabled Enables the cache Disabled Disables the cache w w Boot Sequence This category determines which drive the computer searches first for th...

Page 30: ... Status Default value is On On Keypad is number keys Off Keypad is arrow keys w w Memory Parity Check The default value is disabled w w Gate A20 Option Gate A20 controls the ability to access memory addresses above 1 MB by enabling Fast or disabling Normal access to the processor Default value is Fast w w Typematic Rate Setting Typematic Rate char sec and Typematic Delay Typematic Rate Setting ena...

Page 31: ...led Onboard Serial Port 1 Com1 Onboard Serial Port 2 Com2 Onboard Parallel Port 278H Parallel Port Mode EPP ESC Quit Select Item F1 Help PU PD Modify F5 Old Values Shift F2 Color F6 Load BIOS Defaults F7 Load Setup Defaults 4 7 Chipset Features Setup This screen controls the settings for the board s chip set The controls for this screen are the same as the previous screen The Chipset Features Scre...

Page 32: ...cumulate its charge before the DRAM is refreshed If insufficient fime is allowed refresh may be incomplete and data will be lost A lower setting may increase performance The default value is 4 clocks w wDRAM R W Leadoff Timing This sets the number of CPU clocks allowed before reads and writes to DRAM are performed The default of 8 6 would set the leadoff timing for reads to eight clocks and writes...

Page 33: ...ting systems that do not access the BIOS Unix OS 2 NT etc this setting can be disabled The default is enabled w wVideo BIOS Cacheable As with caching the system BIOS above enabling the Video BIOS cache will cause access to the video BOS addressed at C0000h to C7FFFFh to be cached The default is enabled w w8 bit I O Recovery Time The recovery time is the length of time measured in CPU clocks which ...

Page 34: ... drive PIO Programmed Input Output allows the BIOS to tell the controller what it wants and lets the controller and the CPU perform the complete task themselves This method is simpler more efficeint and faster This BIOS supports five modes 0 thru 4 and can be set by the user or set to Auto detect The default is Auto w wOn Chip Primary Secondary PCI IDE This option enables or disables the on board ...

Page 35: ...board Serial Port 1 2 This option lets you select how this port will be addressed The options are Com1 thru Com4 or disabled The default is Com1for port 1 and Com2 for port 2 w wOnboard Parallel Port This option lets you select the LPT port address Options are 3BCh 378h 278h or Disabled The default is 278h w wParallel Port Mode This option lets you select which mode the parallel port will run in T...

Page 36: ...f IRQ8 Wake Up Event Off IRQ14 Hard Disk Off IRQ12 Wake Up Event Off IRQ15 Reserved Off Power Down Activities Com Ports Accessed Off LPT Ports Accessed Off Drive Ports Accessed Off w wPower Management Options are disabled user defined Min saving and Max saving w wPM Control by APM Options are Yes and No When set for No system BIOS will ignore APM when power managing the system If set on Yes the sy...

Page 37: ...us idle time before the system enters Doze mode w wStandby Mode Defines the continous idle time before the system enters Standby mode w wPower Down Activities Defines the the activities that can cause the PM timers to reload Break ing out of PM Mode ...

Page 38: ...lect Item F1 Help PU PD Modify F5 Old Values Shift F2 Color F6 Load BIOS Defaults F7 Load Setup Defaults w PCI Slot 1 Slot 2 Slot 3 slot 4 INT w For Default Setting Connect to PCI System INT PCI Slot1 INTA INTA PCI Slot1 INTB INTB PCI Slot1 INTC INTC PCI Slot1 INTD INTD PCI Slot2 INTA INTB PCI Slot2 INTB INTC PCI Slot2 INTC INTD PCI Slot2 INTD INTA PCI Slot3 INTA INTC PCI Slot3 INTB INTD PCI Slot3...

Page 39: ...ilable IRQ Select four available IRQs assignments to PCI slots INT w wPCI IRQ Actived By Select the PCI IRQ Active scheme either LEVEL or EDGE Default value is LEVEL w wPCI IDE IRQ Map To Select the IDE IRQ Map to ISA IRQ w wPrimary IDE INT Select the PCI INT that the Primary IDE controller will use Default value is A w wSecondary IDE INT Select the PCI INT that the Secondary IDE controller will u...

Page 40: ... ESC Save Exit Setup F10 Quit Shift F2 Change Color Select Item Load SETUP Defaults except standard CMOS SETUP w w Load SETUP defaults To load SETUP default values to CMOS SRAM enter Y If not enter N w w If any problem has occurred loading the SETUP DEFAULTSis recommended 4 10 PASSWORD SETTING When you select this function the following message will appear at the center of the screen to assist you...

Page 41: ...ou will be asked to confirm the password Type the password again and press Enter You may also just press Esc to abort the selection and not enter a password To disable the password just press Enter when you are prompted to enter a password A message will confirm that the password has been disabled the system will boot and you can enter Setup freely PASSWORD DISABLED If you select System at Securit...

Page 42: ...D D parameter reported by BIOS Type N to keep the old H D D parameter info 4 12 SAVE EXIT SETUP STANDARD CMOS SETUP PASSWORD SETTING BIOSFEATURESSETUP IDEHDDAUTODETECTION CHIPSET FEATURES SETUP DAVE EXIT SETUP PCI SLOT CONFIGURATION EXIT WITH OUT SAVING LOAD SETUP DEFAULTS ESC Save Exit Setup F10 Quit Shift F2 Change Color Select Item Time Date Hard Disk Type ROM ISA BIOS CMOS SETUP UTILITY AWARD ...

Page 43: ...lity 4 13 KEYBOARD SETTING FUNCTION After booting the O S there are some special functions used by the key board as follows CTRL_ALT_DEL Pressing these keys simultaneously will cause the system to WARM START Soft Reset CTRL_ALT_ Pressing these keys simultaneously will change the system speed to high speed Turbo all cache memory enabled ...

Page 44: ...trends C 1994 American Megatrends Inc Setup Utility Standard Advanced Chipset DetectMaster DetectSlave Power Mgnt Peripheral Color Set Security Default Password Anti Virus Original Optimal Fail safe Alt H Help 5 1 Standard Setup Options Date Day and Time Configuration Select the Standard Option then select the Date and Time Icon The cur rent values for each category are displayed Use the arrow key...

Page 45: ...re Type Cylin ders Heads Write precompensation Landing Zone Sectors and Capacity w w Floppy Drive A w w Floppy Drive B Move the cursor to these fields via the up and down arrow keys and select the floppy type The settings are 360 KB 5 1 4 inch 1 2MB 5 1 4 inch 720MB 3 1 2 inch 1 44MB 3 1 2 inch and 2 88MB 3 1 2 inch 5 2 Advanced Setup The WINBIOS Setup options described in this section are selecte...

Page 46: ...1K or at address 0 300 In most instances 0 300 should be used The default is 0 300 w wWait for F1 if Any Error Enable this option to display the message Hit F1 to continue when the system encounters an error during POST The default is Enabled w wSystem Boot Up Num Lock This option lets you turn on or off the num lock for the keyboard during boot up The default is ON w wFloppy Drive Seek at Boot Th...

Page 47: ...ed Cache The video ROM should be set for cache for best performance The adaptor ROM area should be left disabled unless the device in that region can support shadowing Its ROM being copied to RAM for better performance The default is disabled w wIDE Block Mode If you know the maximum s b Sectors per Burst of your drive then it can be chosen here If you are not sure about your drive specs then choo...

Page 48: ...ced method for accessing data on IDE drives Data is accessed by block addresses rather than the traditional Cylinder Header Sector scheme LBA Mode also breaks the 528MB size limit imposed by older IDE drives Enable only if your drive can support LBA The default is disabled w wSecondary Ctrl Drives Present This option specifies the number of IDE drives controlled by the onboard secondary IDE contro...

Page 49: ...led w wPCI VGA Palette Snooping The purpose of this option is to allow multiple VGA devices on different busses in a system to have data written from the CPU to each set of palette registers of every video device ISA VGA and a PCI VGA The options are enabled or disabled The default is enabled w wIRQx Available to x IRQ 3 4 5 7 9 10 11 These options allow interrupts to be specified as being used by...

Page 50: ... suspend The default is disabled w wVESA Video Power Down In This option specifies which mode the video will power down in The options are disabled standby or suspend The default is disabled w wVESA Power Down In This option specifies the power saving mode for the video The options are standy suspend or off The default is standby w wSlow Clock Ratio This ratio indicates the amount the CPU will be ...

Page 51: ...abled The default is 3F8h w wSerial Port 2 This option lets you configure the address of serial port 2 The options are 2F8h 3E8h 2E8h and disabled The default is 2F8h w wParallel Port This option lets you configure the address of the onboard parallel port The options are 3BCh 378h 278h or disabled The default is 378h w wParallel Port Mode This option lets you configure the mode that the onboard pa...

Page 52: ...word is AMI Anti Virus If enabled this option will protect the boot sector of the hard disk drive Nothing can be written to the boot sector while this option is enabled This option should be disabled if you are installing a new operating system that writes to the boot sector The default is disabled 5 8 Defaults Original This option restores the CMOS setup to factory default settings Optimal This o...

Page 53: ...eprogrammed by the FMW The following three files make up the FMW AWDFLASH EXE The Flash Memory Writer utility for Award to Award upgrade AMIFLASH COM The Flash Memory Writer utility for AMI to AMI upgrade README Atextfileofinstructions S68AWXX BIN XX A 2 digit version number Flash memory writer records or programs a new BIOS onto the flash memory chip You cannot upgrade an Award BIOS to a AMI BIOS...

Page 54: ...is isto a Boot your system from a bootable floppy disk with no CONFIG SYS or AUTOEXEC BAT files and then run Flash Memory Writer from a backup copy of your support disk You can make your back up floppy bootable when you format it and use one disk for both purposes b If you are using MS DOS 6 x you can use the feature that allows you to bypass the CONFIG SYS and AUTOEXEC BAT file You do this while ...

Page 55: ...d then Program the flash memory on the mainboard with the new BIOS file You should choose yes to save the original system BIOS to a floppy diskette before you program the new BIOS This leaves you with a backup of your original BIOS in case you need to re install it This option is highly recommended If you can not sucessfully program the BIOS file for whatever reason re install you original BIOS fr...

Page 56: ...R IOW IOR DACK3 DRQ3 DACK1 DRQ1 REFRESH BCLK IRQ7 IRQ6 IRQ5 IRQ4 IRQ3 DACK2 T C BALE 5V OSC GND I O CH CHK SD07 SD06 SD05 SD04 SD03 SD02 SD01 SD00 I O CH RDY AEN SA19 SA18 SA17 SA16 SA15 SA14 SA13 SA12 SA11 SA10 SA09 SA08 SA07 SA06 SA05 SA04 SA003 SA02 SA01 SA00 D01 D02 D03 D04 D05 D06 D07 D08 D09 D10 D11 D12 D13 D14 D15 D16 D17 D18 C01 C02 C03 C04 C05 C06 C07 C08 C09 C10 C11 C12 C13 C14 C15 C16 C...

Page 57: ...B45 B46 B47 B48 B49 B50 B51 B52 B53 B54 B55 B56 B57 B58 B59 B60 B61 B62 12V NC GND NC VCC VCC INTB INTD PST 1 NC PST 2 GND GND NC GND CLK GND REQ VCC AD_31 AD_29 GND AD_27 AD_25 NC CBE 3 AD_23 GND AD_21 AD_19 NC AD_17 CEB 2 GND IRDY NC DEVSEL GND LOCK PERR NC SERR NC CBE 1 AD_14 GND AD_12 AD_10 GND AD_08 AS_07 NC AD_05 AD_03 GND AD_01 VCC NC VCC VCC 7 1 2 PCI BUS SLOT PIN OUT NC 12V NC NC VCC INT ...

Page 58: ...l 3 Available DMA Channel 4 Cascade for DMA controller 1 DMA Channel 5 Available DMA Channel 6 Available DMA Channel 7 Available 7 3 INTERRUPT MAP NMI Parity check error IRQ H W 0 System TIMER interrupt from TIMER 0 1 KEYBOARD output buffer full 2 Cascade for IRQ 9 15 3 SERIAL port 2 4 SERIAL port 1 5 PARALLEL port 2 6 FLOPPY DISK adapter 7 PARALLEL port 1 8 RTC clock 9 Available 10Available 11Ava...

Page 59: ... Diagnostic status byte 0F Shutdown byte 10 Floppy DISK drive type byte 11 Reserved 12 HARD DISK type byte 13 Reserved 14 Equipment byte 15 Base memory low byte 16 Base memory high byte 17 Extension memory low byte 18 Extension memory high byte 19 2d Reserved 2E 2F 2 byte CMOS RAM checksum 30 Reserved for extension memory low byte 31 Reserved for extension memory high byte 32 DATE CENTURY byte 33 ...

Page 60: ...Keyboard 6 Reserved 7 Test CMOS and Verifies CMOS is working properly detects a bad battery battery status BE Chipset Default Programs chipset registers with power on BIOS default C1 Memory presence OEM specific Test to size on board memory test C5 Early shadow OEM specific early shadow enable for fast boot C6 Cache presence External cache size detection test 8 Setup low memory Clear low 64K memor...

Page 61: ...able slot 0 Initialize slot 0 system board 21 2F Enable slot 1 15 Initialize slot 1 15 30 Size base and Size base memory form 256K to 640K and Extended memory Extended memory above 1MB 31 Test base and Test base and Extended memory Extended memory 32 3B Reserved 3C Setup Enabled 3D Initialize and install Detects if mouse is present initialize mouse and install mouse interrupt vectors 3E Setup cach...

Page 62: ...2 Initialize Option Initialize any option ROM s present for C8000h to EFFFFh ROMS s When FSCAN option is enabled will initialize from C8000h to F7FFFh 53 Initialize time value Initialize time value in 40h BIOS area 60 Setup Virus Protect Setup virus protect according to setup 61 Set Boot Speed Set system speed for boot 62 Setup NumLock Set up NumLock status according to setup 63 Boot Attempt Set l...

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