Transcript
  • 5/25/2018 Willem EPROM Programmer Manual

    1/13

    - 1 - Willem EPROM Programmer PCB5.0C Manual

    Website: www.ischip.cn Email: [email protected]

    Willem EPROM Programmer Manual

    Overview

    Willem Eprom programmer can be use to

    Upgrading, Programming BIOS chip, Repairing PC motherboard BIOS chip.

    VCD, DVD, Color TV, Copier, Fax machine, Printer main board maintaining or reparing.

    Car memory device code reading, writing

    MCU development: programming for MCS-51 series, AVR series and PIC series MCU.

    Programming support for over 1500 IC devices, includes EPROM , EEPROM , FLASH , PIC ,

    AVR , MCS-51 , MCS-48, 27Cxx , 28Cxx 28Fxx , 29Fxx , AT29Cxxx , 24Cxx , 93Cxx ,

    PIC16xxx ,DS12xx ,AT89Cxx , AT89Cx051 , AT25xxx , AT90Sxxx , EPROM16bit , 29Fx00 ,

    28Fx00

    New dual powered (USB/AC) Willem EPROM Programmer latest design PCB5.0C

    *** The Latest Version Available ***

    Features and Advantages:

    Can program EPROM, EEPROM, FLASH Burner (Vpp 12.5V, 21V, 25V);

    Supports CHIPS (EPROM, EEPROM, FLASH, I2C, PIC, MCS-51, AVR, 93Cxx, ISP) and more;

    This hardware version (PCB5.0C) is more STABLE than version PCB3B;

    It can program up to 20% faster than Willem EPROM Programmer (PCB3.5C) / (PCB4C) and 50%

    faster than the PCB3B+;

    Takes power from a USB port or from an optional external power supply (not supplied);

    You can choose between Version PCB3B and PCB5.0 using jumper setting if required.

    Latest Version 0.98D8 - adds extensive support for Winbond flash chips and PIC Micro family

    This NEW PCB5.0C has adapters PLCC32 (supports 3.3V devices) and Firmware Hub /LPC on-board

    Software Features :

    Windows based programming software support 98 / ME / NT / 2000 / XP

  • 5/25/2018 Willem EPROM Programmer Manual

    2/13

    - 2 - Willem EPROM Programmer PCB5.0C Manual

    Website: www.ischip.cn Email: [email protected]

    Latest !! Software version 0.98D8 can run on The hardware PCB3.5/PCB4C/ PCB4.5C /

    PCB5.0C only.

    No support The hardware PCB3B, Enhanced Willem and Willem Ver.4 & Ver4.5

    Software willem for PCB45C/ PCB5.0C version0.98D8 support for over PICs microchip morethan Software 0.97ja.

    -. Add PIC microchip 12bit (FLASH memory)

    PIC12F508/509 , PIC10F200/202/204/206 , PIC16F505 , PIC16F54/57

    -. Add PIC18Fxxx

    PIC18F242 , 18F248 , 18F252 , 18F258 , 18F442 , 18F448 , 16F452 , 16F458

    PIC18F1220 , 18F2220 , 18F4220 , 18F1320 , 18F2320 , 18F4320

    PIC18F6520 , 18F6620 , 18F6720 , 18F8520 , 18F8620 , 18F8720

    PIC18F2331 , 18F2431 , 18F4331 , 18F4431

    PIC18F6525 , 18F6621 , 18F8525 , 18F8621

    PIC18F6585 , 18F6680 , 18F8585 , 18F8680

    PIC18F2439 , 18F2539 , 18F4439 , 18F4539

    PIC18F6410 , 18F8410 , 18F6490 , 18F8490

    -. Add PIC18Fxxx

    PIC18F2410 , PIC18F2420 , PIC18F2455

    PIC18F2510 , PIC18F2515 , PIC18F2520 , PIC18F2525 , PIC18F2550 , PIC18F2585

    PIC18F2610 , PIC18F2620 , PIC18F2680

    PIC18F4410, PIC18F4420 , PIC18F4455

    PIC18F4510 , PIC18F4515 , PIC18F4520 , PIC18F4525 , PIC18F4550 , PIC18F4585

    PIC18F4610 , PIC18F4620 , PIC18F4680-. Add Find and edit value OSCCAL (PIC12F629/675 , PIC16F630/676)

    -. Add Edit config at address 0x2008,0x2009 (PIC12F635/683 , PIC16F636/684/688 ,

    PIC16F785)

    -. Fixed Programming PIC all

    -. Test on chip

    PIC12F675 , PIC16F676 , PIC16F684 ,PIC16F767, PIC16F74

    PIC16F872 , PIC16F876 , PIC16F877, PIC16F876A, PIC16F873A, PIC16F819

    PIC16F84 , PIC16F84A , PIC16F628, PIC16F628A,

    eprom PIC12C509JW , PIC16C505JW , PIC16C711JW , PIC16CE625JW

    PIC18F458 , PIC18F4320 , PIC18LF258 , PIC18F4539 , PIC18F4431

    -. Fixed Write/read/verify EEPROM 18F4550

    -. Fixed Bug program 18Fxxx run on Windows XP/2000 (test PIC18F4539 ,

    PIC18F2680 , PIC18F2431 , PIC18F258 ,

    PIC18F4220 , PIC18F4550)

    -. Add find OSCCAL 10Fx00, 12F50x, 12F6xx

    (test PIC10F202, 12F509, 12F675)

    -. Fixed Programm AT89C8253 (Want modify Adapter MCS-51) (test on AT89S8253)

    Production control by an engineer who developed "Willem EPROM Programmer Version PCB3b

    (Standard/Universal) "

    and developed software Free (Now!! 0.97ja) , 0.97j , 0.97i+ , 0.98i , 0.97i , 0.97h , 0.97g

  • 5/25/2018 Willem EPROM Programmer Manual

    3/13

    - 3 - Willem EPROM Programmer PCB5.0C Manual

    Website: www.ischip.cn Email: [email protected]

    The package includes :

    1.Device Programming EPROM, EEPROM, FLASH Burner (Vpp 12.5V,21V,25V)

    2.Software willem (included in CD)

    3.Manual using the Program Willem EPROM (included in CD)

    4.Computer cable (DB25)

    5.USB power cable

    Willem Programmer Supported Device List

    Supported Device List

    Memory/MCU Model #

    1.EPROM

    27C64,27C128, 27C256,27C512,27C010,27C020, 27C040, 27C1001

    M27C1001,M27C2001, M27C4001

    27C080,M27C801,M87C257

    (Fixed on 5V Vcc, and Vpp is adjustble among 12V,15V,21V,25V )

    16 bit

    EPROM(DIP40)(1-4Mbit)

    27C1024 (27C210), 27C2048 (27C2002), 27C4096 (27C4002)

    Eprom 16bit DIP40 adaptor is needed

    16 bit

    EPROM(DIP42)

    (4-32Mbit)

    M27C400(DIP40), 27C800, 27C160, 27C322

    Eprom 16bit DIP42 adaptor is needed

    2.Erasable EPROM

    W27E512, W27E010, W27C010, W27C020, W27C040

    SST27SF256, SST27SF512, SST27SF010, SST27SF020

    MX26C4000

    Vcc = 3.3-3.6V SST37VF512, SST37VF010, SST37VF020, SST37VF040

    3.EEPROM

    28C65, 28C64, 28C128, 28C256, 28C512, 28C010, 28C020, 28C040

    M28C16A/17A (DIP28)28C16, XLS2816 (DIP24)

    AT28C64B, AT28C256, AT28C512, AT28C010, AT28C020, AT28C040

    4.FLASH Memory

    28F64, 28F128, 28F256, 28F512, 28F010, 28F020

    MX26C1000, MX26C2000, MX28F1000, MX28F2000

    Am28F256A, Am28F512A, Am28F010A, Am28F020A

    intel:

    i28F001BX, 28F004, 28F008, 28F016

    SST28SF040A, LE28F4001

    29F64, 29F128, 29F256, 29F512, 29F010, 29F020, 29F040, 29F080

    29F001,29F002, 29F004, 29F008, 29F016, 29F032

    AT29C256, AT29C512, AT29C010A, AT29C020, AT29C040, AT29C040AW29EE512, W29EE011, W29EE012, W29C020(128),W29C040

    PH29EE010(W29EE011)

  • 5/25/2018 Willem EPROM Programmer Manual

    4/13

    - 4 - Willem EPROM Programmer PCB5.0C Manual

    Website: www.ischip.cn Email: [email protected]

    ASD AE29F1008 (AT29C010), AE29F2008 (AT29C020)

    AT49F512, AT49F010, AT49F020, AT49F040

    SST39SF010, SST3S9F020, SST39SF040

    AT49F001, AT49F002, AT49F008A

    Am29F512, Am29F010, Am29F020, Am29F040.HY29F080

    29F002, 29F002T, Pm29F002Twith

    TSOP48 Adapter:Am29F400, Am29F800, 29F160, 29F320 (read/write byte mode)

    HY29F200, HY29F400, HY29F800, AT49F2048A, AT49F4096A, AT49F8192A

    with TSOP48

    Adapter (Vpp12V):i28F200,i28F400, i28F800, i28F160 (TSOP48)

    28F001(DIP32 or PLCC32)

    with

    TSOP48LV Adapter:29LV200, 29LV400, 29LV800, 29LV160, 29LV320 (read/write byte mode)

    with Firmware

    Hub/LPC

    (PLCC32) adapter:

    Firmware Hub:

    82802AB, 82802AC, AT49LW040, AT49LW080

    SST49LF002A, SST49LF003A, SST49LF004A, SST49LF008A

    LPC flash:

    SST49LF020, SST49LF040

    5. Serial

    (I2C)EEPROM

    24C02, 24C04, 24C08, 24C16, 85C72, 85C82, 85C92

    24C32, 24C64, 24C128, 24C256, 24C512 (allC/LC series)

    PCF8572,8572, PCF8582, 8582, PCF8592, 8592

    6.Microwire

    EEPROM

    8 mode:93C06, 93C46, 93LC46, 93C56, 93C57,

    93C66, 93C76, 93C86,93C13,93C14

    16 mode:AT59C11, AT59C22, AT59C13

    CAT35C102, CAT35C104, CAT35C108

    93C06A ,93C46X,93C56,93C66,93C76,93C86 (NS)

    7.PIC embedded

    MCU

    Without 40Pin adaptor: 16C84, 16F84, 16F84A ,16F627,16F628,16F627A,16F628A,16F648A

    16F818,16F819 12C508/A, 12C509/A, 12CE518, 12CE519, 16C505 16C620 16C621, 16C622, 16CE623,

    16CE624, 16CE625, 16C710/711 16F630,16F676

    With 40Pin adaptor:

    16F870,16F871,16F872,16F873,16F874,16F874,16F876,16F877,16F873A,16F874A,16F876A,16F877A

    with PIC embedded

    MCU adapter:16F871,16F874,16F877, 16F870,16F872,16F873,16F876

    8.SPI EEPROM

    Atmel:AT25010,020, 040 (A8-A0)

    AT25080, 160, 320, 640, 128, 256 (A15-A0)

    ST:W95010....256, Microchip 25x010 - 25x640

    25010,25020,25040

    25C080,25C160,25C320,25C640,25C128,25C256,25C512

    AT25HP256,AT25HP512

    AT25HP1024

    CAT64LCxxx (16 Data I/O)

    CAT64LC010, CAT64LC020, CAT64LC040

    9.Test

    SRAM,Lossless

    SRAM Function

    DS1220,DS1225Y, DS1230Y/AB, DS1245Y/AB, DS1249Y/AB

    6116, 6264, 62256, 62512, 628128

  • 5/25/2018 Willem EPROM Programmer Manual

    5/13

    - 5 - Willem EPROM Programmer PCB5.0C Manual

    Website: www.ischip.cn Email: [email protected]

    10. Atmel MCU

    with AtmelAT89adapter

    89 series:

    Atmel:AT89C51,52,55, AT89LV51,52,55

    AT89S8252 (8K+2K), AT89S53, AT89LS8252,AT89LS53

    AT89C1051,AT89C2051,AT89C4051 (20pin)

    AT89C51RC (32KB), AT89C55WD (6.2V)

    SST89C54/58, SI89C52Intel:i87C51, i87C51FA, i87C51FB

    i8xC51,i8xC52,i8xC54,i8xC58

    90 series:

    AT90S1200,AT90S2313

    11. Atmel MCU

    with AVR DIP40 adapter:AT90S8515 ,AT90S4414, ,AT90S4434, AT90S8535

    with AVR DIP28 adapter:AT90S2333,AT90S4433

    with Atmel AT89

    PLCC44

    adapter:

    P8048AH, P8049AH,P8050AH, P8042AH (Vea = 12V)

    P8041, P8042

    OTP (read/verify/Progam)

    P8748,P8749H,P8742H(Vea = 18V)

    EPROM (read/verify/Progam)

    D8748,D8749,D8742,D8741, D8742(Vea = 18V)

    This multi-function programmer enhanced version has build-in FWH/LPC,PLCC32,P28F002BC adaptor, no needto buy

    additional adaptor, it directly supportsIntel810,815,845 main board N82802AB,SST49LF002,SST49LF004 and 3.3V

    MCU...

  • 5/25/2018 Willem EPROM Programmer Manual

    6/13

    - 6 - Willem EPROM Programmer PCB5.0C Manual

    Website: www.ischip.cn Email: [email protected]

    Installation and system settings

    1Hardware structure introduced

    Socket ZIFSeries 27, Series 28, Series 29, 39/49 series BIOS chip and chip PLCC

    conversion of the Series Block, ATMEL 89 MCU conversion blocks.

    ParallelBy cable Connected to the computer parallel port.

    DIP socket24 series, PIC MCU chip, 25 series, 93 series of memory; ATMEL

    AVR MCU chip conversion Block, PHILIPS MCU chip conversion blocks.

    OutletUsed to connect power adapter.

    8 DIP switch Series 27, Series 28, Series 29, 39/49 series BIOS chips, such as

    reading and writing before the operation, the need for this switch to the appropriate

    location. Specific location of the light display software.

    9 JumperA small number of special chips, need to adjust jumper. (Jumper specific

    method detailed in the first three jumper settings or software display)

    10 LEDGreen LED that the programmer power state, said red LED chip Vpp power state,

    yellow LED chip programming that state.

    2Hardware Installation:

    Installation steps are as follows:

    1, shut down the computer power supply.

    2, the end of the cable into the parallel port on the computer.

  • 5/25/2018 Willem EPROM Programmer Manual

    7/13

    - 7 - Willem EPROM Programmer PCB5.0C Manual

    Website: www.ischip.cn Email: [email protected]

    3, at the other end of the cable into the programming of the 25-hole outlet. Note:

    The cable is directional, will not be able to insert anti-inserted.

    4, USB cable into the computer on one end, the other end inserted on the programmer.

    5, J10 short jumper to end VUSB.

    At this time programming for the green power light should be lit, that the programmer

    has been connected to power. Hardware connecting finished.

    Note: 1, the computer's parallel port to the BIOS settings for the ECP or ECP

    + EPP;

    2, the programmer to use the on-line cable is dedicated, can not be used

    for other equipment, can not replace the other cables.

    3Software installation:

    Operation of setup.exe with a floppy disk installation process, will appear on

    the screen to install the screen:

    Click on the installation of "Next" button, select the default order on it, will be

    the programmer's control procedures installed in C: \ Program Files \, and on the

    desktop-generated programming for the shortcut Icon, double-click the shortcut icon,

    you can run the programmer-control procedures.

    5Hardware detection:

    Launch control procedures, the procedures in the menu bar of the "Help" item,

    click on "test hardware" items. If normal, a "Hardware present" tips. If not connect

    power or right, there will be "hardware error: check power & connection" of the tips,

    then you have to check carefully whether the programmer and computer connections,

    and power is normal.

    The programming instructions for use

  • 5/25/2018 Willem EPROM Programmer Manual

    8/13

    - 8 - Willem EPROM Programmer PCB5.0C Manual

    Website: www.ischip.cn Email: [email protected]

    1the menu bar:

    The procedure screen, the first of the menu bar, the meaning is as follows:

    file Open, save and exit .

    edit Edit the data in the cache.

    device Choose chips.

    action Read; programming / testing; validity testing and empty check; erase; reader

    configuration bit; programming targeted largest chip signature.

    help Help text.

    2Sidebar:

    Left to right in the order

    1Open the file

    2Save the file

    3Clear the cache of data

    4Read out the data in the chip and saved to the cache

    5Validation Program Data

    6Chip blank check

    7Read Electronic ID

    8Read LockBit

    9Corresponding hardware version PCB5.0C

    10Program Chip

    11Erase chip

    3Window select button:

    DeviceProgramming window. All the programming operation, are carried out under this

    window.

    Buffer Data Buffer

    Test H/WProgramming Test

    4The status bar

    BIOS chip programmingSteps

    1, manually select chip models;

    2, in accordance with procedures showed that the DIP switch settings diagram, set

    up DIP switches and other jumpers;

    3, chip demand placed on diagram;

    4, click the write button, to write the chip.

    Write an intel 82802AB chip as an example:

  • 5/25/2018 Willem EPROM Programmer Manual

    9/13

    - 9 - Willem EPROM Programmer PCB5.0C Manual

    Website: www.ischip.cn Email: [email protected]

    1Chip select and set up:

    First models to choose chips,

    Two ways: 1, the menu bar "device" option to choose 2, chips selected area, press

    the select button chip choice (Figure circle in the box that chip select button).

    Chip parameters

    Size&checksumChip capacity and data validation of the

    buffer.

    Shift&pattem adress Chip address range and the

    highest addresses.

    tWPWrite pulse width

    tWCWrite delay time.

    2DIP switch settings

    According to the plans in the state of DIP

    switches, the programmer DIP switch settings.

    3Chips in:

    Switch set up to determine chip position. The BIOS chip, 32 feet on the ZIP in

    the socket. Special type of chip, the need to use the corresponding conversion, with

    the choice of intel82802AB chip, suggesting that we need to FWH / LPC conversion Block,

    as required, the chip FWH / LPC conversion blocks. Insert, attention should be paid

    the same direction.

    Dual-inline package insert ZIP chip socket, is the direction, the gap between

    the chip upward direction;

    Note:

    1, procedures are displayed parameters of the chip, if there is no special

    circumstances, does not require adjustment.

    2, different chips, switch different settings.

    3, launched after the driver, select a good chip models, the chip can plug into

    the programmer.

    4, EPROM chips, need to adjust jumper, according to the specific procedures can

    be prompted to adjust.

    4read the chip content and programming:

    read out the chips in:

    Chip and choose the correct place, you can click on the toolbar "read" button

    and read out the content of chips. Read out the contents stored in the buffer zone,

    if the data in the buffer zone will cover these data, you can click on the following

    procedures screen "buffer" items, dragging the rolling of the buffer zone to view

    the data.

    Read the chip procedures in the process of programming on a bright yellow light

    that has been working with chip voltage.

    programming chips:

    Choose the right place and type of chip, click on the Toolbar's "open file" button,

  • 5/25/2018 Willem EPROM Programmer Manual

    10/13

    - 10 - Willem EPROM Programmer PCB5.0C Manual

    Website: www.ischip.cn Email: [email protected]

    to write the document read to the buffer zone. The document can be downloaded from

    the Internet you upgrade the document, you also can be saved before the backup files.

    Then, click on the toolbar "program" button, the data into the buffer chip. Note that

    some chip can be written into the air, you can use the "erase" function chips erased

    the contents, then the use of "air check" to detect whether the chip is empty. After

    the program, the program will automatically check into the data.

    In the chip programmed in the process of bright yellow light if the chip also

    needs Vpp programming voltage, the red indicator light will be bright.

    5Copy chips:

    First choice of chip types, and then plug in the original chip, the use of "read"

    the original function read out the data chip, chip and then put on target, the use

    of "programming" function can be written into the data.

    Note:

    1, if the wrong choice of models chips, or into the wrong position may burn chips.

    2, some chips, such as SST39SF020 chips, need to be erased, in order to properly

    write.

    3, some chips, the choice of models, the process will remind you that in the chip

    programming, to CPU cooling process, virus detection procedures for the closure, so

    as not to affect the right into the chip.

    4, drivers occupy less on system resources, in the chip operation in the process

    of opening another window for other operations.

    The following is the content of programming on the chip and a set of parameters

    for advanced users, we can use the following operation, if the chip normal programming,

    not to carry out the following adjustments to the primary users, and do not adjust

    the following parameters.

    R / C delay time: adjustment programming pulse delay. If your computer speed, the

    programmer is not working properly, could be delayed for a point value.

    Skip Write 0xFF: choice of programming when it is FF Skip content of bytes.

    Fast Programming: choice is not fast programming.

    Printer Port: choice of programming-connect the parallel port. Is usually LPT1

    (0X378).

    Offset: Programming began setting the address.

    Check Type: CRC can choose 32 or 16 cumulative manner.

    EPROM chip programming operation

    EPROM chips on the operation, and common BIOS chip similar, the main difference

    is that the programming on a jumper to make the appropriate settings. Below us to

    write a 27 C16 (programming voltage of 12.5 V) chip for example, tell us specific

    instructions:

    1 Select chip and the setting up of:

  • 5/25/2018 Willem EPROM Programmer Manual

    11/13

    - 11 - Willem EPROM Programmer PCB5.0C Manual

    Website: www.ischip.cn Email: [email protected]

    Press the "chip select button" option corresponding to the chip models. DIP switch

    procedure shows that the adjustment diagram, as shown, can be seen from the map, EPROM

    chips, DIP switch settings and Flash ROM chip is different. Control this map, the

    programmer on the DIP switch settings.

    For EPROM chips, ZIP socket jumper right of the location, have also changed,

    according to the procedures for prompt, and make the appropriate adjustments.

    Some of the programming voltage chips higher, at this time, the program will prompt

    you adjust programming for the right edge of the two jumpers, to get a higher Vpp

    programming voltage. Specific operations, according to procedures set up to the tips.

    The two jumpers, should not be adjusted at will, or will cause irreparable consequences

    chip.

    2Determine the location of chips:

    DIP switches set up, and then determine the location of chips. Chip to 32 feet

    on the ZIP socket, the direction of chip gap, the same is upward. Capacity of less

    than 1 M chip, the pin number less than 32 feet, chips at the bottom, ZIP placed at

    the bottom of the socket.

    3Programming:

    According to read data files, programming can be. Programming with a red indicator

    light, said the programmer has provided the corresponding programming voltage Vpp.

    Note: If you choose the wrong type chips, jumper settings error into the wrong position

    or may burn EPROM chips.

    Other detailed information, please visit the Web site: www.ischip.cn

  • 5/25/2018 Willem EPROM Programmer Manual

    12/13

    - 12 - Willem EPROM Programmer PCB5.0C Manual

    Website: www.ischip.cn Email: [email protected]

    Common motherboard chip models:

    Manufacturers Model Memory VPP

    Am29F010 1M

    Am29F002 2M

    Am29F040 4M

    Am28F010A 1M VPP=12.0 V

    Am28F020A 2M VPP=12.0 V

    AMD

    Am28F040 4M VPP=12.0 V

    AE29F010A 1M

    AE29F020 2M

    AE29F040 4M

    AE29F1008 1M

    ASD

    AE29F2008 2M

    AT29C010A 1MAT29C020 2M

    AT29C040 4M

    AT49F001 1M

    AT49F002 2M

    Atmel

    AT49F004 4M

    CAT28F001BX-T/B 1M VPP=12.0 V

    CAT28F010 1M VPP=12.0 VCATALYST

    CAT28F020 2M VPP=12.0 V

    i28F001BX-T/B 1M VPP=12.0 V

    i28F010 1M VPP=12.0 VInteli28F020 2M VPP=12.0 V

    MX28F1000P 1M VPP=12.0 V

    MX28F2000P/T 2M VPP=12.0 V

    MX29F001(N)T/B 1MMacronix

    MX29F002(N)T/B 2M

    FV29C51001T/B 1MMosel-Vitelic

    FV29C51002T/B 2M

    PH29EE010 1M

    PH29EE020 2M

    PH28SF040 4MPH39SF010 1M

    SST

    PH39SF020 2M

    M28F256(A) 256K VPP=12.0 V

    M28F512 512K VPP=12.0 V

    M28F001 1M VPP=12.0 VSGSTHOMSON

    M29F002TNTB 2M

    W29EE011 1M

    W29C010 1M

    W29C020 2MWinbond

    W29C040 4M

  • 5/25/2018 Willem EPROM Programmer Manual

    13/13

    - 13 - Willem EPROM Programmer PCB5.0C Manual

    Website: www.ischip.cn Email: [email protected]

    Chip substitution of knowledge:

    BIOS chips above the logo in two strings, such as: Am29F010 AT29C020, and the number

    of chips in front of the type related to 28 series of EEPROM chip; figures behind

    the string with the size of the memory chips, such as that of its 010,001 1 M for

    the chips, 020,002 note is 2 M chips; 1 M chip into the BIOS file for the length of

    128 K, 2M chips for the 256 K.

    Chip substitution principle is: as long as memory size, the same package, you can

    substitute, chip manufacturers and types can be ignored. However, the use of 28 series

    of chips (such as 29 series to replace the chip, because the two different programming

    voltage, so you can use, but not on the motherboard programming, such as the need

    to upgrade BIOS, can be programmed). For example: We can use a substitution AT29C020

    chip on the motherboard original SST39SF020 or W29C020 chip; AT29C010 with a chip

    on the motherboard replacement of the original SST29EE010 or W29EE011 chip.


Recommended