Intel SB-6862 User's Manual
Contents
1. 15 TIMENS oa inate ate at 15 System Interrupts 16 Direct Memory Access 17 The I O Address Map nenea na aaa 18 Configuration Utilities 19 VEL VIEW testis a da at ad a MR 19 Standard Setup 21 Advanced Setup 22 Advanced Chipset Setup 23 Power Management Setup 24 PCI PnP Setup 555455 tea 25 Peripheral Setup eie eee e 26 SB 6862 Ix SB 6862 Overview This document describes the technical features of the board The topics include The Microprocessor description of the features of the Pentium Pro microprocessor e Board illustration and brief description of the board Connectors description of connector locations and functions on the board e Jumpers detailed description of the jumpers used to the board System Memory detailed description of system memory how to add memory System Memory Map listing of traditional address assignments for system memory Configuration Utilities a description and instructions for the board s BIOS SB 6862 1 The Microprocessor The Pentium Pro microprocessor contains all the features of the Pentium and 80486 processors and is 100 compatible with 8086 88 80286 and 80386 DX and SX microprocessors In addition the Pentium features e 64 bit Data Bus e Superscalar Architecture Capability for2. 10 SB 6862 System Memory There are a total of four banks available for memory upgrades The board supports DIMM in the following combinations 1M x 64 72 8 MB bank 2M x 64 72 16 MB bank 4M x 64 72 32 MB bank 8M x 64 72 64 MB bank 16M x 64 72 128 MB bank 32M x 64 72 256 MB bank Installing and Removing DIMM Read these instructions completely before installing or removing DIMMs The DIMM is held by plastic press clips on both sides of the slot Installing DIMM 1 Hold the DIMM so that the gold tab is pointing toward the slot The DIMM is keyed so that it will only snap into the slot when positioned correctly 2 Press one end of the DIMM until it inserts and its press clip snaps into place 3 Press the other end of the DIMM until it inserts and its press clip snaps into place Removing DIMM 1 Pull both press clips simultaneously until the DIMM pops up from its slot SB 6862 11 System Memory Configuration m 2 16MB imxoa72 16 2 6472 24 1 64 72 24 MB 32 MB 1M x 64 72 32 MB M x 64 72 2MB 4Mx64 72 2 MB 1M x 64 72 32 MB 40 MB 2M x 64 72 40 MB 0 MB 1M x 64 72 8 MB 1M x 64 72 8 MB 2M x 64 72 8 MB 8 MB 1M x 64 72 48 MB 56MB 1M x 64 72 2M x 64 72 2 x 64 72 2M x 64 72 56 MB 4M x 64 72 1M x 64 72 1M 64 72 x 64 72 4 MB 2M x 64 72 2M x 64 72 AMB SMx 6472 4 MB 64 MB 2M x 64 72 64 MB 72 MB 72 MB 4M
3. 16M x 64 72 32M x 64 72 1M x 64 72 264 MB 1 x 64 72 16M x 64 72 16M x 64 72 SB 6862 2 1 px 4M x 64 72 64 72 8Mx64 72 8M x 64 72 BM 64 72 64 72 8M x 64 72 x 64 72 16M x 64 72 16M x 64 72 256 32 6472 13 272 272 2 6472 272 280 IM x 64 72 288 32M 64 72 4M x 6472 288 MB 288 MB 304 MB 2M x 64 72 2M x 64 72 320 MB 320 MB 8M x 64 72 320 MB 32M 64 72 8M x 6472 352 4M x 64 72 x 64 72 384 16 64 72 16M 64 72 6472 384 392 16M x 64 72 16 x 64 72 400 MB 16M x 64 72 16M 64 72 416 MB 16M x 64 72 16M x 64 72 448 MB 8M x 64 72 512 MB 16M x 64 72 16M x 64 72 512 32M 64 72 6472 512 MB 520 MB 528 MB 544 MB 640 MB 640 MB 16M x 64 72 768 MB 776 MB 32M x 64 72 784 MB 32M x 64 72 32M x 64 72 800 MB 32M x 64 72 2 x 64 72 896 MB 32M x 64 72 2 x 64 72 LGB 32M x 64 72 14 SB 6862 18 lt System Memory Map 000000 to 640 KB motherboard system memory 9FFFFF 0A0000 to 128 KB video display reserved for graphics OBFFFF ROM 0C0000 to 128 KB I O reserved for ROM on ODFFFF expansion ROM VO 0E0000 to 64 KB reserved on duplicate code OEFFFF motherboard assignment at FE0000 0F0000 to 64 KB ROM on duplicate code OFFFFF motherbord assignme
4. options SB 6862 21 Advanced Setup Advanced Setup allows you to fine tune some of the special features These features are pre set for you at the factory Double click the Advanced Setup icon on the Main Menu Use the arrow keys to toggle between items Available options for the highlighted item are displayed on the right side of the menu Press lt PgUp gt or lt PgDn gt to toggle through available options AMI BIOS SETUP ADVANCED CMOS SETUP c 1996 American Megatrends Inc All Rights Reserved Quick Boot Enabled 1st Boot Device IDE 0 2nd Boot Device FLOPPY 3rd Boot Device CDROM Try Other Boot Devices Yes Initial Display Mode BIOS Display Mode at Add On ROM Init Force BIOS Floppy Access Control Read Write Hard Disk Access Control Read Write S M A R T for Hard Disk Disable Boot Up NumLock On PS 2 Mouse Support Enabled Primary Display VGA EGA Password Check Setup Boot to OS 2 No CPU MicroCode Updation Enabled P6 Internal Cache Write Back System BIOS Cacheable Enabled C000 16k Shadow Cached C400 16k Shadow Cached Available Options Disabled Enabled Esc Exit N Sel PgUp PgDn Modify F2 F3 Color Figure 12 The Advanced Setup Menu 22 SB 6862 Advanced Chipset Setup This option lets you configure some of the advanced features of your particular system through the chipset It was pre configured at the factory and need not be altered Double click on the Chipset Setup icon on the Main Men
5. When up grading to the faster grade of Pentium processor make sure to have the appropriate voltage regulator installed 4 SB 6862 Board Connectors KI Keyboard J3 J4 Universal Serial Bus USB Floppy drive Primary IDE 8 Secondary IDE Parallel JP18 JP45 12 volt CPU fans Keyboard Connector K1 Keyboard plugs are keyed for proper installation Primary IDE Drive Header J11 J11 is the connector for the primary on board PCI IDE drive controller Pin 1 is marked When connecting your hard drive orient the cable s pin one with pin 1 of J11 SB 6862 Secondary IDE Drive Header J12 110 is the connector for the secondary on board PCI IDE hard drive controller Pin 1 is marked Use this to cable your IDE hard drive When connecting your hard drive orient the ribbon s pin one with pin 1 of J71 Parallel Port DB1 provides the connection for the board s parallel port Serial Port 1 Connector J98 J98 provides the connection for serial port 1 COM 1 Serial Port 2 Connector J97 J97 provides the connection for the board s serial port 2 COM 2 Floppy Drive Connector J8 J8 connects the floppy drive to the controller provided on the board Universal Serial Bus Connectors J3 J4 The motherboard provides two 4 pin universal serial bus USB connectors 6 SB 6862 Fan Connectors JP18 JP45 These fans provide cooling for the powerful Pentium Pro processors JP45 connects
6. Auto Sec Slave Auto Boot Sector Virus Protection Disabled Month Jan Dec Esc Exit Sel Day 01 31 PgUp PgDn Modify Year 1901 2099 F2 F3 Color Figure 11 The Standard Setup Menu Pri Master Primary master IDE PCI hard drive Define the parameters of your hard disk and modes The default setting is Auto to auto detect drive type 20 SB 6862 Pri Slave Primary slave IDE PCI hard drive Define the parameters of your hard disk and modes The default setting is Auto to auto detect drive type Sec Master Secondary master IDE PCI hard drive if installed Define the parameters of your hard disk and modes The default setting is Not Installed Sec Slave Secondary slave IDE PCI hard drive if installed Define the parameters of your hard disk and modes The default setting is Not Installed Note You may also manually enter the hard disk parameters Two helpful tables appear at the end of this section One describes drive parameters and the other is a list of various hard drive parameters Floppy Drive A Floppy Drive B Select the type that matches the drive installed Scroll through the fields using the up and down arrows You may select from the following Date Time Enter new values through the keyboard Use the arrow keys to toggle between items Available options for the highlighted item are displayed on the right side of the menu Press lt PgUp gt lt PgDn gt to toggle through available
7. Technical Reference SB 6862 Dual Pentium Pro Single Board Computer with Natoma Chipset LABORATORIES INC 1641 McGaw Avenue Irvine California 92614 SB 6862 SB 6862 Features e Intel Pentium Pro processor upgradeable through 180 or 200 MHz and dual Pentium Pro upgrade Intel Natoma chipset Basic connectors provided for speakers hard disk LED reset turbo LED keylock PS 2 mouse and CMOS battery System memory upgradeable to 1 GB using x 64 or 72 dual inline memory modules DIMM Processor facilitated error correcting memory ECC using x 72 DIMM e Processor based cache 256 KB or 512 KB on board On board E IDE controller with seperate master slave IDE mode support for up to 4 IDE drives and support for up to 2 floppy drives e On board I O 2 serial 2 universal serial bus USB and 1 parallel ports e PS 2 keyboard mini DIN connector extra on board PS 2 mouse connector SB 6862 iii FCC Standards The FCC Federal Communications Commission restricts the amount of radiation and radio frequency emissions coming from computing equipment Note This equipment has been tested and found to comply with the limits for a Class B digital device pursuant to Part 15 of the FCC Rules These limits are designed to provide reasonable protection against harmful interference in a residential installation This equipment generates uses and can radiate radio frequency en
8. bled Hard Disk Power Down Mode Disabled Hard Disk Time Out Minutes Disabled Standby Time Out Minutes Disabled Suspend Time Out Minutes Disabled Slow Clock Ratio 1 1 IRQ3 Ignore IRQ4 Ignore 5 Ignore IRQ7 Ignore IRQ9 Ignore IRQ10 Ignore Esc Exit MN Sel IRQII Ignore PgUp PgDn Modify 15 Ignore F2 F3 Color Figure 12 The Advanced Setup Menu Instant On Timer is a green mode timer letting you wake the system up as it is triggered IRQ3 4 5 7 9 10 11 12 13 14 15 can be ignored or monitored Monitored IRQ activity wakes up the system Use the arrow keys to toggle between items Available options for the highlighted item are displayed on the right side of the menu Press lt PgUp gt lt PgDn gt to toggle through available options 24 SB 6862 PCI PnP Setup This menu allows you to define attributes of the PCI bus portion of the motherboard AMI BIOS SETUP PLUG AND PLAY SETUP c 1996 American Megatrends Inc All Rights Reserved Plug and Play O S PCI Latency Timer PCI Clocks PCI VGA Palette Snoop PCI IDE Bus Master OffBoard PCI IDE Card OffBoard PCI IDE Primary IRQ OffBoard PCI IDE Secondary IRQ DMA Channel 0 DMA Channel 1 DMA Channel 3 DMA Channel 5 DMA Channel 6 DMA Channel 7 IRQ3 IRQ4 1805 12807 1209 18010 IRQI1 IRQI5 No 64 Disabled Disabled Auto Disabled Disabled PnP PnP PnP PnP PnP PnP PCI PnP PCI PnP PCI PnP PCI P
9. chased the miniature tower system please note the following WARNING The system is to be installed on desk or table tops only The unit will become unstable if operated as a floor standing unit and unintentional force is applied to the top of the unit Turn the unit off and unplug the power cord before you open the cover to install any cards or peripheral devices SB 6862 WARNING CAUTION THERE IS A DANGER OF EXPLOSION IF THE BATTERY IS INCORRECTLY REPLACED REPLACE ONLY WITH THE SAME OR EQUIVALENT TYPE RECOMMENDED BY THE MANUFACTURER DISCARD USED BATTERIES ACCORDING TO THE MANUFACTURER S INSTRUCTIONS ATTENTION IL Y A DANGER D EXPLOSION S IL Y A REMPLACEMENT INCORRECT DE LA BATTERRIE REMPLACER UNIQUEMENT AVEC UNE BATTERI DU MEME TYPE OU D UN TYPE RECOMMENDE PAR LE CONSTRUCTEUR ETTERAU REBUT LES BATTERRIES USAGEES CONFORMEMANT AUX INSTRUCTIONS DU FABRICATANT vi SB 6862 NOTICE The information within this manual is subject to change without notice CSS Laboratories Incorporated shall not be held liable for technical or editorial errors or omissions contained in herein nor for incidental or consequential damages resulting from the furnishing performance or use of this material All rights reserved No part of this publication may be reproduced stored in a retrieval system or transmitted in any form or by any means mechanical photocopying recording or otherwise without the prior written permissio
10. ergy and if not installed and used in accordance with the instructions may cause harmful interference to radio communications However there is no guarantee that interference will not occur in a particular installation If this equipment does cause harmful interference to radioor television reception which can be determined by turning the equipment off and on the use is encouraged to try to correct the interference by one or more of the following measures e Reorient or relocate the receiving antenna ncrease the separation between the equipment and receiver e Connect the equipment into an outlet on a circuit different from that to which the receiver is connected e Consult the dealer or an experienced radio TV technician for help CSS Labs is not responsible for any radio or television interference caused by unauthorized modifications to this equipment Operation with non certified peripherals 1s likely to result in interference to radio and TV reception iv SB 6862 To ensure compliance to FCC non interference regulations peripherals attached to this device require shielded I O cables NOTICE The use of a non shielded I O cable with this device is in violation of U S Federal law and will not allow the device to meet the maximum emission limits CAUTION Any changes or modifications not expressly approved by the grantee of this device could void the user s authority to operate the equipment Note If you have pur
11. executing two instructions in parallel Pipelined Floating Point Unit Separate 8 KB Code and 8 KB Data Caches total 16 1 1 cache 256 KB or 512 KB internal L2 cache Bus Cycle Pipelining Writeback MESI Protocol in the Data Cache e Internal Parity Checking Itis available in a variety of speeds from 180 MHz through 200 MHz For additional information talk to your authorized CSS Laboratories representative 2 SB 6862 The Board DIMM 1 DIMM 2 DIMM 3 U60 U59 U58 Figure 1 The Board FI JP45 ad aa 5 oorr HEE I 2 eas lar d Erg 260 pu Hop E n var o REC Fon 2 22 ro i We oas3d pm lt 5 yN pH E ado AddOTA HEHA er uri gt SB 6862 Voltage Regulator Module A voltage regulator module installed on the board ensures that the correct voltage is provided to the particular processor installed
12. n of CSS Laboratories Inc Product names mentioned herein are for identification purposes only and may be trademarks and or registered trademarks of their respective companies 1997 CSS Laboratories Inc All rights reserved P N MS SBC 6862 DOC Revision 1 August 1997 SB 6862 SB 6862 Table of Contents OVERVIEW ccn ete se aga vacated abies 1 The Microprocessor 2 The Board fata dai da aa o te gt ave 3 Voltage Regulator sess 4 Board Connectors herede ER Ee ta 5 Keyboard Connector 5 Primary IDE Drive Header 11 5 Secondary IDE Drive Header 12 6 Parallel Port 6 Serial Port 1 Connector 98 6 Serial Port 2 Connector J97 6 Floppy Drive Connector J8 6 Universal Serial Bus Connectors 3 4 6 Fan Connectors JP18 JP45 7 nnno d TE 8 Processor Bus Clock Speed JP4 8 Processor Bus Frequency JP26 27 9 Processor Speed Ratio JP32 JP31 JP30 JP29 10 System Memory nenea nea enne enne 11 Installing and Removing DIMM eee 11 System Memory Configuration 12 System Memory
13. nP PCI PnP PCI PnP PCI PnP PCI PnP Available Options Disabled Enabled Esc Exit N Sel PgUp PgDn Modify F2 F3 Color Figure 15 The PCI Plug and Play Setup Menu Use the arrow keys to toggle between items Available options for the highlighted item are displayed on the right side of the menu Press lt PgUp gt lt PgDn gt to toggle through available options SB 6862 25 Peripheral Setup This menu allows you to specify the peripherals installed on your motherboard On board IDE enables the on board chipset E IDE function Use the arrow keys to toggle between items Press lt Enter gt to access the drop down selection menu Use the arrow keys to toggle between options Press lt Enter gt to make a selection AMI BIOS SETUP PERIPHERALS SETUP c 1996 American Megatrends Inc All Rights Reserved OnBoard FDC Available Options OnBoard Serial Port 1 Disabled OnBoard Serial Port 2 Enabled OnBoard Parallel Port Parallel Port Mode Parallel Port DMA Channel Esc Exit N Sel Parallel Port IRQ PgUp PgDn Modify OnBoard IDE F2 F3 Color Figure 16 The Periperals Setup Menu 26 SB 6862 SB 6862 27
14. nt at FF0000 100000 to maximum memory is I O channel memory FDFFFF 15 MB FE0000 to 64 KB reserved on duplicate code FEFFFF motherboard assignment at 0 0000 FF0000 to 64 KB reserved on duplicate code FFFFFF motherboard assignment at Timers The system has three programmable timers counters controlled by timer counter chips and defined as channels 0 through 2 as follows Channel 0 System Timer Channel 1 Refresh Request Generator Channel 3 Tone Generation for Speaker SB 6862 15 System Interrupts The processor has two controllers supplying 16 IRQs Below are assignments in decreasing priority LEVEL FUNCTION Microprocessor NMI Parity or I O Channel Check Interrupt Controllers RO e ____ ___ Interrupts IRQ8 IRQIS redirected to IRQ2 16 SB 6862 Note IRQ9 18010 IRQII IRQI2 IRQ15 IRQ3 IRQ4 IRQS and IRQ7 can be redirected to PCI add in boards The PCI standard has a 4 IRQ limitation Some PCI add in boards do not require IRQs Some can share an IRQ with another board of the same model and manufacture Check the add in board s docmentation for IRQ information Direct Memory Access The system supports seven DMA channels Controller 1 Controller 2 Channel 0 Spare Channel 4 Cascade for Controller 1 Channel 1 SDLC Channel 5 Spare Channel 2 Diskette Channel 6 Spare Channel 3 Spare Channel 7 Spare The first DMA controller hold
15. ocument is an overview of the BIOS To start the program press the lt Delete gt key while the system is booting The Utilities menu screen will display SAMI HIFLEX SETUP UTILITY VERSION 1 13 c 1996 American Megatrends Inc All Rights Reserved Standard CMOS Setup Advanced CMOS Setup Advanced Chipset Setup Power Management Setup PCI Plug and Play Setup Peripheral Setup Auto Detect Hard Disk Change User Password Change Supervisor Password Change Language Setting Auto Configuration with Optional Settings Auto Configuration with Fail Safe Settings Save Settings and Exit Exit Without Saving Figure 10 The Main Menu SB 6862 19 The most commonly accessed selections are Standard CMOS Setup Advanced CMOS Setup Advanced Chipset Setup Power Management Setup PCI Plug and Play Setup and Peripheral Setup Standard Setup This utility allows you to record your system setup To start SETUP Double click on the Standard Setup icon on the Main Menu Alter only the items that need to be changed or reset If a selected option is correct skip the corresponding step AMIBIOS SETUP STANDARD CMOS SETUP c 1996 American Megatrends Inc All Rights Reserved Date mm dd yy Friday March 3 1997 Base Memory Time hh mm ss 11 11 00 Extd Memory 15 MB Floppy Drive A 1 44 MB 3 1 2 Floppy Drive B Not Installed LBA Blk PIO 32bit Type Size Cyln Head WPcom Sec Mode Mode Mode Mode Pri Master Auto PriSlave Auto Sec Master
16. s channels 0 through 3 These channels support 8 bit data transfers between 8 bit I O adapters and 8 or 16 bit system memory Each channel can transfer data in 4 KB blocks The second DMA controller holds channels 4 through 7 Channel 4 cascades channels 0 through 3 to the microprocessor Channel 5 6 and 7 support 16 bit data transfers between 16 bit I O adapters and 16 bit system memory These DMA channels can transfer data throughout the 16 MB system address space in 128 KB blocks Channel 5 6 and 7 cannot transfer data on odd byte boundaries SB 6862 17 The I O Address DMA 1 INTR i Timer Keyboard NMI mask register DMA page register INTR 2 2 Clr rst math coprocessor Math coprocessor Fixed disk Toystick Secondary parallel port Secondary serial port Prototype card Primary parallel port SDLC secondary bisynchronous Primary bisynchronous Monochrome display printer adapter Color graphics monitor adapter Diskette controller Primary serial port 18 SB 6862 Configuration Utilities Overview The BIOS Setup utility stores your system s configuration The utility described below provides a bridge to PCI slots in excess of the four allowed by current standards When your system boots it s configuration is read into main memory Hard drives floppy drives video adapter memory and keyboard are described to the system The BIOS is pre configured at the factory This d
17. to the primary processor s fan JP18 connects to the dual processor fan Ground SB 6862 Jumpers The board s jumpers are pre configured at the factory Read the following section carefully before configuring your system The board has the following jumpers Processor bus clock speed JP26 JP27 Processor bus frequency JP32 JP31 Processor speed ratio JP30 JP29 JP69 JP24 Test pins jumper closed JP1 JP2 J70 147 JP47 JP46 Test pins jumper open Processor Bus Clock Speed JP4 JP3 Pentium Pro processors are designed with one of two bus clock speeds The bus clock speed is always a fraction of the processor s internal speed Bus Clock JP4 JP3 Speed 8 SB 6862 Processor Bus Frequency 4 26 JP27 JP26 and JP27 synchronize the processor bus frequency with the processor s speed Processor Bus JP26 JP27 Frequency Processor Speed Ratio JP32 JP31 JP30 JP29 The Pentium Pro uses a clock multiplier to run at a speed faster than the processor bus These jumpers match the installed processor s speed with single board computer s defined processor speed When upgrading processors you may need to adjust these jumpers Ee Ratio OoN OFF SB 6862 The following table matches processor speed processor clock and the board s processor bus speed Processor Clock Ratio Processor Type Speed Bus Speed 180 MHz 60 MHz 200 MHz 66 MHz
18. u Use the arrow keys to toggle between items Available options for the highlighted item are displayed on the right side of the menu Press lt PgUp gt lt PgDn gt to toggle through available options AMI BIOS SETUP ADVANCED CHIPSET SETUP c 1996 American Megatrends Inc All Rights Reserved USB Function Disabled Available Options USB KB Mouse Legacy Support Disabled Disabled USB Passive Release Enable Disabled Enabled DRAM Speed ns 70 DRAM Integrety Mode ECC Disabled DRAM Fast head off Disabled DRAM Refresh Type CAS RAS DRAM Refresh Queue Enabled DRAM ECC Mode Disabled VGA Frame Buffer USWC Disabled PCI Frame Buffer USWC Disabled Fixed Memory Hole Disabled CPU to IDE Posting Enabled USWC Write Posting Disabled CPU to DRAM Pipeline Enabled PCI Burst Write Combine Enabled Read Around Write Enabled Deturbo Mode Disabled Esc Exit N Sel TypeF DMA Buffer Control 1 Disabled PgUp PgDn Modify F2 F3 Color Figure 13 The Chipset Setup Menu SB 6862 23 Power Management Setup This utility lets you set the green functionality parameters AMI BIOS SETUP POWER MANAGEMENT SETUP c 1996 American Megatrends Inc All Rights Reserved Standard Power Management Enabled Available Options Advanced Power Mngmt Disabled Disabled Instant On Timeout minutes N A Enabled Auxiliary Power Supply Timeout Disabled DPMS Video Power Supply Timeout Disabled Green PC Monitor Power State Disa
19. x 64 72 80 MB 80 MB 4M x 64 72 80 MB 2M x 64 72 2 x 64 72 80 MB 1M x 64 72 12 SB 6862 A 1 x 64 72 BRYA AR 40 48 MB 48 MB 48 MB A o lt x A N N 88 8 64 72 64 72 1M 64 72 x 64 72 1 96 MB 64 72 4 64 72 6472 96 MB 64 72 8Mx6472 104 MB 1M x 64 72 8 4 M x 64 72 x 64 72 4M x 64 72 128 MB 4M x 64 72 4M x 64 72 x 64 72 4 64 72 1 1 1 2 2 36 8 8 136 IM x 64 72 144 2M x 6472 144 2M x 64 72 144 16M x 64 72 152 16M x 64 72 160 MB 16M x 64 72 160 16M x 64 72 160 4M x 64 72 176 16M x 64 72 192 MB 64 72 192 16M x 64 72 192 16M x 64 72 200 MB IM x 64 72 208 2M x 64 72 224 MB 224 MB 256 MB 256 MB 16M x 64 7 8M x 64 72 8M x 64 72 00 16 64 72 1 64 72 2 4 8 2 8 4 8 8 2 8 64 72 64 72 6 64 72 64 72 64 72 64 72 64 72 64 72 M x 64 72 M x 64 72 M x 64 72 M x 64 72 M x 64 72 M x 64 72 8 8 4M 112 2M x 64 72 4M x 64 72 4M x 64 72 4M x 64 72 4M 1 4M x 64 7 24M x 64 72 256 MB 16M x 64 72 8M x 64 72 8M x 64 72 264 MB 6 256 MB 16M x 64 72
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