P2-133A A Pentium ® II or Deschutes Slot1 Processor based AGP mainboard (100/66MHz) TRADEMARK All products and company names are trademarks or registered trademarks of their respective holders. These specifications are subject to change without notice. Manual Revision 1.
P2-133A
P2-133A Technical Support Services If you need additional information, help during installation or normal use of this product, please contact your retailer. If your retailer can not help, you may E-Mail us with any questions at the following address tech@epox.com Record your serial number before installing your P2-133A mainboard.
P2-133A User Notice No part of this product, including the product and software may be reproduced, transmitted, transcribed, stored in a retrieval system, or translated into any language in any form by any means without the express written permission of EPoX Computer Company (hereinafter referred to as EPoX) except documentation kept by the purchaser for backup purposes.
P2-133A Table of Contents Section 1 Introduction Components Checklist .................................... 1-1 Overview Pentium II or Deschutes Processor .................. 1-2 S.E.C. Cartridge Terminology ......................... 1-3 Accelerated Graphics Port .............................. 1-4 Hardware Monitoring ..................................... 1-4 P2-133A Form-Factor ................................... 1-6 I/O Shield Connector ...................................... 1-7 Power-On/Off (Remote) ...
P2-133A Power Management Setup .............................. 4-10 PNP/PCI Configuration .................................. 4-13 Load Setup Defaults ....................................... 4-14 Integrated Peripherals ..................................... 4-15 Change Supervisor or User Password ............. 4-19 IDE HDD Auto Detection ............................... 4-20 HDD Low Level Format ................................. 4-22 Save & Exit Setup ..........................................
P2-133A Introduction Section 1 INTRODUCTION Components Checklist ü ü ü ü ü ü A. (1) P2-133A mainboard B. (1) P2-133A user’s manual C. (1) Floppy ribbon cable D. (1) Hard drive ribbon cables E. F. (1) (1) Foldable Retention Module Heatsink Support Unit (Optional) G. (1) PS/2 to AT keyboard connector adapter (optional) H.
Introduction P2-133A Overview Pentium II or Deschutes Processor The Pentium® II or Deschutes Processor (The Deschutes Processor as 300/ 100MHz, 350/100MHz, 400/100MHz and 450/100MHz speed with 512K-L2 cache Versions.) is the follow-on to the Pentium® Processor. The Pentium® II or Deschutes Processor, like the Pentium® Pro processor, implements a Dynamic Execution micro-architecture -- a unique combination of multiple branch prediction, data flow analysis, and speculative execution.
P2-133A Introduction packaging technology and each of the physical elements of the product are referred to using accurate technical descriptions. This allows clear reference to the products as just a processor. This is the model used in past packaging technologies like PGA, TCP, PQFP, DIP, etc. S.E.C. Cartridge Terminology • • • • • • • • Pentium® II or Deschutes Processor The new enclosed card packaging technology is called a “Single Edge Contact cartridge.
Introduction P2-133A “Pentium® II or Deschutes Processor/Slot 1 processor” or “Deschutes Processor” will apply to both the Pentium® II Processor desktop processors. Accelerated Graphics Port (AGP or A.G.P.) Typically, 3D graphics rendering requires a tremendous amount of memory, and demands ever increasing throughput speed as well. As 3D products for the personal computer become more and more popular, these demands will only increase. This will cause a rise in costs for both end users and manufacturers.
P2-133A Introduction Page Right Blank Page 1-5
Introduction P2-133A P2-133A Form-Factor The P2-133A is designed with ATX form factor - the latest industry standard of chassis. The ATX form factor is essentially a Baby-AT baseboard rotated 90 degrees within the chassis enclosure and a new mounting configuration for the power supply. With these changes the processor is relocated away from the expansion slots, allowing them all to hold full length add-in cards.
P2-133A Introduction I/O Shield Connector The P2-133A is equipped with an I/O back panel. Please use the appropriate I/O shield (figure 3). Parallel Port Figure 3: P2-133A I/O back panel layout PS/2 Mouse PS/2 Keyboard USB COM1 COM2 Power-On/Off (Remote) The P2-133A has a single 20-pin connector for ATX power supplies. For ATX power supplies that support the Remote On/Off feature, this should be connected to the systems front panel for system Power On/Off button.
Introduction P2-133A System Block Diagram P e n tiu m II o r D e sc h u tes P ro ce ss o r 1 0 0 /6 6 M Hz 1 0 0 /6 6 M Hz 6 6 M Hz PC I Bridg e and m em ory controller VT8 2 C 6 9 3 VT8 2 C 5 9 6 A I/O Bridg e Winbond 8 3 9 7 7 TF Figure 5: System Block Diagram Page 1-8
P2-133A Features Section 2 FEATURES P2-133A Features: • P2-133A is based on the Pentium® II or Deschutes Processor operating at 233 ~ 333MHz (66MHz) or 300 ~ 450MHz (100MHz) on Slot 1. The board is configured by an Easy-Setting-Daul-Jumper (E.S.D.J.) to match your CPU clock speed. • Designed with VIA APOLLO PRO+ 693/596A AGPset. • Supports up to 384 Mega of DRAM (minimum of 16 MB) on board, You can use 168-pin DIMM x 3.
Features P2-133A • P2-133A utilizes a Lithium battery which provides environmental protection and longer battery life. • Supports the Universal Serial Bus (USB) connector. The VIA 82C596A chip provides the means for connecting PC peripherals such as; keyboards, joysticks, telephones, and modems. • Built-in ATX 20-pin power supply connector. • Software power-down when using Windows® 95/98. • Supports ring-in feature (remote power-on through external modem, allows system to be turned on remotely.
P2-133A Installation Section 3 INSTALLATION Page 3-1
Installation P2-133A Bank 2 J5 ATX Power Input Keyboard (Bottom) JP13 DIMM 1 DIMM 2 DIMM 3 USB 0 CPU Cartridge SLOT 1 (Top) J3 FDD1 USB 1 + IR CONN.
P2-133A Installation Easy Installation Procedure Easy Installation Procedure The following must be completed before powering on your new system: 3-1. 3-2. 3-3. 3-4. Configure Jumpers to match your hardware Install memory chips Install Pentium II or Deschutes Processor Device Connectors Section 3-1 Configure Jumpers We design this mainboards with an ESDJ to make your installation fast and easy. The following will describe all of the ESDJ that you are required to set before moving on to step 3-2.
Installation P2-133A * * * * * ** Note: Based on the implementation of VIA Chipset Apollo Pro+, P2-133A is able to provide two host bus frequencies -- either 66 or 100MHz for Slot1 processor and memory operating. The default is set at 100MHz once Pentium® II processor to be mounted onto this mainboard. However, no matter what kind of Slot1 processor you installed, it should come with right memory modules for normal and stable operation.
P2-133A Installation Section 3-2 System Memory Configuration Memory Layout The P2-133A supports (3) 168-pin DIMMs (Dual In-line Memory Module). The DIMMs can be either EDO (Extended Data Out) or SDRAM (Synchronized DRAM). The DIMMs may be installed using just one chip. • • • We recommend using SDRAM DIMM can not mixing with EDO DIMM modules. The EDO DIMM only support pentium® II Processor at 66MHz, not support Deschutes Processor at 100MHz.
Installation P2-133A D IM M 1 (B ank 0) Total M e mory D IM M 2 (B ank 1) D IM M 3 (B ank 2) = 384MB Maximum EDO /SDRAM* 8MB, 16MB, 32MB, 64MB, 128MB X 1 EDO /SDRAM* 8MB, 16MB, 32MB, 64MB, 128MB X 1 EDO /SDRAM* 8MB, 16MB, 32MB, 64MB, 128MBX 1 = 256MB Maximum EDO /SDRAM* 8MB, 16MB, 32MB, 64MB, 128MB X 1 EDO /SDRAM* 8MB, 16MB, 32MB, 64MB, 128MB X 1 N one = 128MB Maximum EDO /SDRAM* 8MB, 16MB, 32MB, 64MB, 128MBX 1 N one N one Table 1 * SDRAM only supports 8, 16, 32, 64, 128MB DIMM modules.
P2-133A Installation Figure 6 DIMM Module clip before installation Figure 7 DIMM Module clip after installation To remove the DIMM module simply press down both of the white clips on either side and the module will be released from the socket.
Installation P2-133A Section 3-3 Installing a Pentium II or Deschutes Processor The P2-133A uses the Single Edge Contact (SEC) slot for a Pentium II processor packaged in an SEC cartridge. The SEC slot is not compatible with other nonPentium II processors. Please have ready the following list of components so that we may install the processor onto the motherboard. 1. 2. 3.
P2-133A Installation bottom make sure you press firmly on SEC cartridge to firmly secure into the Slot 1 Socket. Now we need to secure the heatsink with the top half of the support (figure 11). Take the top piece of the support and slide it into the bottom fin (figure 11) on the heatsink and then push forward until it clips into the bottom base (figure 9) that is already there (figure 11). Figure 9 Figure 9 shows the layout of Slot 1 and the holes for mounting the Heatsink base piece (figure 8).
Installation P2-133A Section 3-4 Device Connectors Please install the motherboard into the chassis. Now that your motherboard is installed you are ready to connect all your connections (figure 12).
P2-133A Installation Section 3-4 Device Connectors (continued) 1 Reset - Closed to restart system. J2 Speaker - Connect to the system's speaker for beeping 1. Speaker 3. GND 2. N/C 4. GND KeyLock - Keyboard lock switch & Power LED connector 1. Power LED(+) 4. Keylock 2. N/C 5. GND * The power LED lights when the 3. GND system is powered on and blinks in SLEEP MODE (Suspend mode). 1 IR Connector 1. VCC 2. NC 3. IRRX J3 + + 4. GND 5.
Installation P2-133A Section 3-5 External Modem Ring-in Power ON and Keyboard Power ON Functions (KBPO) On the basis of bounded functions in I/O chipset, the two serial ports are able to support the External Modem Ring-in Power ON function. Once users connect the external modem to COM1 or COM2, the P2-133A mainboard allows users to turn on their system through the remote and host's dial-up control.
P2-133A Installation Notes: 1.Intel ATX version 2.0 specification has recommended you use the power supply with 0.72A(720mA) in 5.0VSB. With our P2-133A mainboard, the 5.0VSB standby power only has to be > = 0.1A (100mA) then you can enjoy this unique benefit. However, the ATX power supply which is < 0.1 (100mA) is still applicable to your system by placed JP13 at the position 2-3 to disable this feature.
Installation P2-133A Page Left Blank Page 3-14
P2-133A BIOS Section 4 AWARD BIOS SETUP BIOS Instructions Award’s ROM BIOS provides a built-in Setup program which allows user to modify the basic system configuration and hardware parameters. The modified data will be stored in a battery-backed CMOS, so that data will be retained even when the power is turned off. In general, the information saved in the CMOS RAM will stay unchanged unless there is a configuration change in the system, such as hard drive replacement or a device is added.
BIOS P2-133A The menu displays all the major selection items. Select the item you need to reconfigure. The selection is made by moving the cursor (press any direction key ) to the item and pressing the ‘Enter’ key. An on-line help message is displayed at the bottom of the screen as the cursor is moved to various items which provides a better understanding of each function. When a selection is made, the menu of the selected item will appear so that the user can modify associated configuration parameters.
P2-133A BIOS NOTE: The “Halt On:” field is used to determine when to halt the system by the BIOS if an error occurs. NOTE: Floppy 3 Mode support is a mode used to support a special 3.5” drive used in Japan. This is a 3.5” disk that stores only 1.2 MB, the default setting for this is disabled. 4-2 BIOS Features Setup Selecting the “BIOS FEATURES SETUP” option in the CMOS SETUP UTILITY menu allows users to change system related parameters in the displayed menu.
BIOS P2-133A Enabled: Activates automatically when the system boots up causing a warning message to appear when anything attempts to access the boot sector. Disabled: No warning message will appear when anything attempts to access the boot sector. Note: Many disk diagnostic programs that access the boot sector table can trigger the virus warning message. If you plan to run such a program, we recommend that you first disable the virus warning.
P2-133A BIOS Boot Sequence: This category determines which drive is searched first by the O/S (Operating System). The default is A,C,SCSI. The following is your list of options: [A, C, SCSI] - [C, A, SCSI] - [C, CD-ROM, A] - [CD-ROM, C, A] [D, A,CD-ROM],[E, A, CD-ROM] - [F, A, CD-ROM] - [SCSI, A, C] [SCSI C, A] - [C Only] Swap Floppy Drive: This will swap your physical drive letters A & B if you are using two floppy disks. The default is Disabled. Enabled: Floppy A & B will be swapped under the O/S.
BIOS P2-133A hardware. Fast: The A20 signal is controlled by Port 92 or chipset specific method. Typematic Rate Setting: This determines the keystrokes repeat rate. The default is Disabled. Enabled: Allows typematic rate and typematic delay programming. Disabled: The typematic rate and typematic delay will be controlled by the keyboard controller in your system. Typematic Rate (Chars/Sec): This is the number of characters that will be repeated by a keyboard press. The default is 6.
P2-133A BIOS uses the RAMDAC of the PCI card. Disabled: Disables the VGA card Palette Snoop function. OS Select For DRAM > 64MB: Some operating systems require special handling. Use this option only if your system has greater than 64MB of memory. The default is Non-OS2. OS2: Select this if you are running the OS/2 operating system with greater than 64MB of RAM. Non-OS2: Select this for all other operating systems and configurations.
BIOS P2-133A 4-3 Chipset Features Setup Choose the “CHIPSET FEATURES SETUP” in the CMOS SETUP UTILITY menu to display following menu. ROM PCI/ISA BIOS(2A6LFPAB) CHIPSET FEATURES SETUP AWARD SOFTWARE, INC. Bank 0/1 DRAM Timing Bank 2/3 DRAM Timing Bank 4/5 DRAM Timing : Fast : Fast : Fast SDRAM Cycle length Memory Hole At 15Mb Addr. Read Around write Concurrent PCI/Host Video RAM Cacheable AGP Aperture Size Delay DRAM Read Latch : Auto : Disabled : Disabled : Enabled : Disabled : 64M : 2.
P2-133A BIOS Memory Hole at 15M-16M: You can reserve this memory area for the use of ISA adaptor ROMs. The default is Disabled. Enabled: This field enables the main memory (15~16MB) to remap to ISA BUS. Disabled: Normal Setting. NOTE: If this feature is enabled you will not be able to cache this memory segment. AGP Aperture Size: The amount of system memory that the AGP card is allowed to share. The default is 64. 4: 4MB of systems memory accessable by the AGP card.
BIOS P2-133A CPU(V): The voltage level of the CPU. +1.5V: The voltage level of the CPU’s GTL+ Bus. +3.3V, +5V, +12V: The voltage level of the switch power supply. 4-4 Power Management Setup Choose the “POWER MANAGEMENT SETUP” in the CMOS SETUP UTILITY to display the following screen. This menu allows the user to modify the power management parameters and IRQ signals. In general, these parameters should not be changed unless it’s absolutely necessary.
P2-133A BIOS mode. Min. saving: Minimum power savings. Inactivity period is 1 hour in each mode. User define: Allows user to define PM Timers parameters to control power saving mode. PM controlled APM: This option shows whether or not you want the Power Management to be controlled the Advanced Power Management (APM). The default is Yes. Yes: APM controls your PM No: APM does not control your PM Video Off Method: This option allows you to select how the video will be disabled by the power management.
BIOS P2-133A The P2-133A supports HDD Power Down, Doze and Standby power saving functions when using the Intel Pentium II Processor. The default is Disabled Doze Mode: The “Doze” mode timer starts to count when no “PM events” have occurred. Suspend Mode: This function works only when the Pentium II Processor is installed. The timer starts to count when “System Standby” mode timer is timed out and no “PM Events” are occurring. Valid range is from 1 minute up to 1 hour.
P2-133A BIOS Time (hh:mm:ss) Alarm: This sets the time that you need the system to turn on. The deault is 08:00:00. 4-5 PNP/PCI Configuration The PNP/PCI configuration program is for the user to modify the PCI/ISA IRQ signals when various PCI/ISA cards are inserted in the PCI or ISA slots. WARNING: Conflicting IRQ’s may cause the system to not find certain devices. ROM PCI/ISA BIOS(2A6LFPAB) PNP/PCI CONFIGURATION AWARD SOFTWARE, INC.
BIOS P2-133A Cards. Auto: If your ISA card and PCI card are all PNP cards, BIOS will assign the interrupt resource automatically. Reset Configuration Data: This setting allows you to clear ESCD data. The default is Disabled Disabled: Normal Setting. Enabled: If you have plugged in some Legacy cards to the system and they were recorded into ESCD (Extended System Configuration Data), you can set this field to Enabled in order to clear ESCD.
P2-133A BIOS 4-7 Integrated Peripherals ROM PCI/ISA BIOS(2A6LFPAB) INTEGRATED PERIPHERALS AWARD SOFTWARE, INC.
BIOS P2-133A Onchip IDE Second Channel: The default is Enabled. Enabled: Enables Onboard IDE secondary port. Disabled: Disables Onboard IDE secondary port. Primary Master PIO The default is Auto. Auto: BIOS will automatically detect the Onboard Primary Master PCI IDE HDD Accessing mode. Mode 0~4: Manually set the IDE Programmed interrupt mode. Primary Slave PIO The default is Auto. Auto: BIOS will automatically detect the Onboard Primary Slave PCI IDE HDD Accessing mode.
P2-133A BIOS Auto: The computer will select the optimal setting. Disabled: The hard drive will run in normal mode. Secondary Master UDMA: This allows you to select the mode of operation for the hard drive. The default is Auto. Auto: The computer will select the optimal setting. Disabled: The hard drive will run in normal mode. Secondary Slave UDMA: This allows you to select the mode of operation for the hard drive. The default is Auto. Auto: The computer will select the optimal setting.
BIOS P2-133A Disabled: Disable Onboard SMC CHIP’s Serial port 1. Onboard Serial Port 2: This field allows the user to configure the 2nd serial port. The default is Auto. AUTO: Enable Onboard Serial port 2 and address is Auto adjusted COM1: Enable Onboard Serial port 2 and address is 3F8H/IRQ4. COM2: Enable Onboard Serial port 2 and address is 2F8H/IRQ3. COM3: Enable Onboard Serial port 2 and address is 3E8H/IRQ4. COM4: Enable Onboard Serial port 2 and address is 2E8H/IRQ3.
P2-133A BIOS Power On Method: There are “Button Only”, “Hot Key” and “Any key” can be chosen by this field that allows users to select one of these various functions as Power On Method for their requirement. The default value in this selection is “ Hot Key”. (Ctrl-F1) Hot Key: User can press “Control Key” (Ctrl) and “Function Key” (from F1 to F12) individually to power on the system. The interval between “Ctrl” key and function Key (F1-F12) must be short. Anykey: Press anykey to power on the system.
BIOS P2-133A 3. After pressing the [Enter] key (ROM password if the option was not used) or current password (user-defined password), the user can change the password and store new one in CMOS RAM. A maximum of 8 characters can be entered. 4-9 IDE HDD Auto Detection The “IDE HDD auto detection” utility is a very useful tool, especially when you do not know which kind of hard disk type you are using. You can use this utility to detect the correct disk type installed in the system automatically.
P2-133A BIOS 1024, 16 & 63 no. Cylinder x no. Head x no. Sector x no. per sector (1024) ( 16) ( 63) ( 512) 528 Megabytes If user set his HDD to NORMAL mode, the maximum accessible HDD size will be 528 Megabytes even though its physical size may be greater than that! LBA (Logical Block Addressing) mode: A new HDD accessing method to overcome the 528 Megabyte bottleneck. The number of cylinders, heads & sectors shown in setup may not be the number physically contained in the HDD.
BIOS P2-133A INT 12h in order to access the right HDD address! Maximum HDD size: no. Cylinder x no. Head x no. Sector x bytes per sector (1024) ( 32) ( 63) ( 512) 1 GigaByte Note: To support LBA or LARGE mode of HDDs, there must be some software involved. All the software is located in the Award HDD Service Routine (INT 13h). It may fail to access a HDD with LBA (LARGE) mode selected if you are running under an Operating System which replaces the whole INT 13h.
P2-133A Appendix Appendix A: A-1 MEMORY MAP Address Range [00000-7FFFF] [80000-9FBFF] [9FC00-9FFFF] [A0000-C7FFF] [C8000-DFFFF] [E0000-EEFFF] [EF000-EFFFF] Size 512K 127K 1K 160K 96K 60K 4K [F0000-F7FFF] [F8000-FCFFF] [FD000-FDFFF] [FE000-FFFFF] 32K 20K 4K 8K Description Conventional memory Extended Conventional memory Extended BIOS data area if PS/2 mouse is installed Available for Hi DOS memory Available for Hi DOS memory and adapter ROMs Available for UMB Video service routine for Monochrome & CGA
Appendix [3D0-3DF] [3F0-3F7] [3F8-3FF] P2-133A CGA adapter. FLOPPY DISK controller. SERIAL port 1. A-3 TIMER & DMA CHANNELS MAP TIMER MAP: TIMER Channel 0 TIMER Channel 1 TIMER Channel 2 DMA CHANNELS: DMA Channel 0 DMA Channel 1 DMA Channel 2 DMA Channel 3 DMA Channel 4 DMA Channel 5 DMA Channel 6 DMA Channel 7 System timer interrupt. DRAM REFRESH request. SPEAKER tone generator. Available. Onboard ECP (Option). FLOPPY DISK (SMC CHIP). Onboard ECP (default). Cascade for DMA controller 1. Available.
P2-133A 14 15 Appendix Onboard HARD DISK (IDE1) channel. Onboard HARD DISK (IDE1) channel. A-5 RTC & CMOS RAM MAP RTC & CMOS: 00 Seconds. 01 Second alarm. 02 Minutes. 03 Minutes alarm. 04 Hours. 05 Hours alarm. 06 Day of week. 07 Day of month. 08 Month. 09 Year. 0A Status register A. 0B Status register B. 0C Status register C. 0D Status register D. 0E Diagnostic status byte. 0F Shutdown byte. 10 FLOPPY DISK drive type byte. 11 Reserve. 12 HARD DISK type byte. 13 Reserve. 14 Equipment type.
Appendix P2-133A Page Left Blank A-4
P2-133A Appendix Appendix B: B-1 POST CODES ISA POST codes are typically output to I/O port address 80h. POST (hex) DESCRIPTION 01-02 Reserved. C0 Turn off OEM specific cache, shadow. 03 1. Initialize EISA registers (EISA BIOS only). 2. Initialize all the standard devices with default values Standard devices includes. - DMA controller (8237). - Programmable Interrupt Controller (8259). - Programmable Interval Timer (8254). - RTC chip. 04 Reserved 05 1. Keyboard Controller Self-Test. 06 2.
Appendix 0C 0D P2-133A Initialization of the BIOS Data Area. (40:ON - 40:FF) 1. Program some of the Chipset's value according to Setup. (Early Setup Value Program) 2. Measure CPU speed for display & decide the system clock speed. 3. Video initialization including Monochrome, CGA, EGA/VGA. If no display device found, the speaker will beep. 0E 1. Test video RAM. (If Monochrome display device found) 2. Show messages including. - Award Logo, Copyright string, BIOS Data code & Part No.
P2-133A 3E 3F-40 BF 41 42 43 45 44 45 46-4D 4E 4F 50 51 52 53 60 Appendix Try to turn on Level 2 cache. Note: Some chipset may need to turn on the L2 cache in this stage. But usually, the cache is turn on later in POST 61h. Reserved. 1. Program the rest of the Chipset's value according to Setup. (Later Setup Value Program) 2. If auto-configuration is enabled, program the chipset with pre-defined Values. Initialize floppy disk drive controller. Initialize Hard drive controller.
Appendix 61 62 63 FF P2-133A 1. Try to turn on Level 2 cache. Note: If L2 cache is already turned on in POST 3D, this part will be skipped. 2. Set the boot up speed according to Setup setting. 3. Last chance for Chipset initialization. 4. Last chance for Power Management initialization. (Green BIOS only) 5. Show the system configuration table. 1. Setup daylight saving according to Setup value. 2. Program the NUM Lock, typematic rate & typematic speed according to Setup setting. 1.
P2-133A Appendix Appendix C NOTE: The "LOAD SETUP DEFAULTS" function loads the system default data directly from ROM and initializes the associated hardware properly. This function will be necessary when you accept this mainboard, or the system CMOS data is corrupted. ROM PCI/ISA BIOS(2A6LFPAB) CMOS SETUP UTILITY AWARD SOFTWARE, INC.
Appendix P2-133A Appendix D CPU Clock Frequency Selection In BIOS Setting. There is a special function for CPU over-clocking requirement which can be chosen and set by BIOS, please refer to the following steps for adjustment. 1. Enter the BIOS CMOS setup program. 2. Choose Chipset Features Setup in main menu. 3. Use Page down (or+) / Page up (or -) to choose CPU clock frequency as one of 66.8, 75, 83.3MHz or by JP3 to setting from 103MHz to 133MHz. (Note: There are 66.8, 75 and 83.
