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Search Again :: Adv Search 401 results in 0.001s
<1234567…14>
  • ROM replacement using 28C256 EEPROMThought I'd share a quick project I knocked up in order to use a 28C256 EEPROM in place of the standard 23128 ROM in the Spectrum. The connections a…

    ... order to use a 28C256 EEPROM in place of the ... carried directly through to the EEPROM.

    Pin ... 1 (A15) on the EEPROM socket is connected to either ... connected to VCC on the EEPROM socket.

    ... and one to carry the EEPROM. This fits (just!) ...
    balford balford December 2013 Hardware
  • Another cause for DivIDE problems on 48K'sThe last months some topics were opened to discuss problems with 48K ZX Spectrums and DivIDE. Sofar we found: - Bad Z80's because of poor fanout (si…

    Come to think of it I have only sinclair roms on my boards. Though I have not the 57C version of DivIDE either. How does it work with flashing a Xicor 28C256 eeprom and use it as ROM?
    Johan1973 Johan1973 December 2012 Hardware
  • Replacing +2/+3 rom with eeprom?Hi I want to change my +2a to +3e (or +2e). Garry mentions that 27C256 eprom can be used. I would like to use 28C256 instead. Pins are not all the s…

    ... . I would like to use 28C256 instead. Pins are not all ... ). I have tried to connect eeprom pin 1 (A14) to socket ... 's pin 27 and eeprom pin 27 unconnected (and also ...
    Timppa Timppa August 2005 Sinclair Miscellaneous
  • Divide Eeprom - Write Protect FeatureDivIDE interface can contain two types of eeprom chip: EEPROM AT28C64 (without write protection, always rewritable) [url]http://www.atmel.com/dyn/re…

    ... two types of eeprom chip:

    EEPROM AT28C64 (without write ... url]
    Classic 8kB eeprom without any features. Can be ... img]


    EEPROM AT28C64B (with write protection feature ... img]
    Modern 8kB eeprom with software features. Can be ...
    velesoft velesoft March 2009 Hardware
  • Various data sheets, any interest?Hi. I have in my possession data sheets (in pdf format) for various integrated circuits, among others those for the AY-3-8910,8912,8913 from General…

    ... data sheet for the 28C256 32Kx8bit Parallel EEPROM in case anyone would ...
    The_Bert The_Bert August 2011 Hardware
  • Divide: problems with SNA files and upgrading EEPROMHello everybody, I am new at the forum. My name is Fernando, first of all thank you to the admins to give me access and the opportunity to participat…

    ... not possible to update the EEPROM with a new (or old ...
    Fernando Fernando July 2013 Hardware
  • flashing 28C256 by diagnostic board?Is it possible to flash EEPROMs 28C256 by use of the diagnostic board? Which page I have to choose for address space #4000-#7FFF?

    Is it possible to flash EEPROMs 28C256 by use of the diagnostic board? Which page I have to choose for address space #4000-#7FFF?
    HZJ HZJ December 2016 Hardware
  • Various data sheets, any interest?Hi. I have in my possession data sheets (in pdf format) for various integrated circuits, among others those for the AY-3-8910,8912,8913 from General…

    ... data sheet for the 28C256 32Kx8bit Parallel EEPROM in case anyone would ... . Take into account that some EEPROM's have a built-in ...
    mcleod_ideafix mcleod_ideafix August 2011 Hardware
  • THE ROM CHIPSDoes anyone know which are the ROM chips in ZX Spectrum 128K +2?

    ... to arrive...


    eeprom 28c256 connection in zx128+2:
    - pin 1 of eeprom must be connect only to ... socket
    - pin 27 of eeprom must be connect to +5V ... (connect to pin 28 of eeprom)
    - all other pins are ...
    Johan1973 Johan1973 August 2012 Hardware
  • Another cause for DivIDE problems on 48K'sThe last months some topics were opened to discuss problems with 48K ZX Spectrums and DivIDE. Sofar we found: - Bad Z80's because of poor fanout (si…

    ... and divide system in one eeprom chip :-) EEPROM socket on divide 57c ... be placed here 32kB flash eeprom 28C256. Low 16kB can contain ZX48rom ... be used for select 16kB eeprom page.... and we need additional ...
    velesoft velesoft January 2013 Hardware
  • Another cause for DivIDE problems on 48K'sThe last months some topics were opened to discuss problems with 48K ZX Spectrums and DivIDE. Sofar we found: - Bad Z80's because of poor fanout (si…

    ... and divide system in one eeprom chip :-) EEPROM socket on divide 57c ... be placed here 32kB flash eeprom 28C256. Low 16kB can contain ZX48rom ... be used for select 16kB eeprom page.... and we need additional ...
    bverstee bverstee January 2013 Hardware
  • Another cause for DivIDE problems on 48K'sThe last months some topics were opened to discuss problems with 48K ZX Spectrums and DivIDE. Sofar we found: - Bad Z80's because of poor fanout (si…

    [QUOTE]EEPROM socket on divide 57c have 28pins and can be placed here 32kB flash eeprom 28C256.[/QUOTE]

    This is what I am going to try one day. divIDE should have it from the start.
    kpuchatek kpuchatek January 2013 Hardware
  • Odd versions of the Multiface One.I've been looking through the adverts for the Multiface One and it's clear that there were a number of versions available. Note the earliest advert …

    ... Multiface ROM images in the EEPROM?

    Only the 28C64B ... a 8k by 8 bit EEPROM...

    [B][I]Mark ... ..
    So e.g. a 28C256 is needed, which can incorporate ...
    bverstee bverstee April 2014 Hardware
  • RTC module for DIVIDE[IMG]http://velesoft.speccy.cz/other/rtc_module_v01_full_top.jpg[/IMG] [IMG]http://velesoft.speccy.cz/other/rtc_module_v01_full_bottom.jpg[/IMG] [IMG…

    ... only if you connect 32kB EEPROM chip 28C256. Also can be used ... original 8kB eeprom and both jumpers will ...
    velesoft velesoft July 2014 Hardware
  • Unable to reflash DivIDE2k14I've been trying to reflash my DivIDE 2k14 from Lotharek. I'd like to replace the FATware version supplied with the one approriate for my 128k +2 Eng…

    ... and here is used different eeprom chip than on original divide ... eeprom for 4 firmwares. It's eeprom 28C256 without write protect feature. This eeprom ... unusable (work only with 8kB EEPROM chip 28C64B)
    velesoft velesoft October 2014 Hardware
  • Unable to reflash DivIDE2k14I've been trying to reflash my DivIDE 2k14 from Lotharek. I'd like to replace the FATware version supplied with the one approriate for my 128k +2 Eng…

    ... and here is used different eeprom chip than on original divide ... eeprom for 4 firmwares. It's eeprom 28C256 without write protect feature. This eeprom ... unusable (work only with 8kB EEPROM chip 28C64B)[/QUOTE]

    lotharek lotharek October 2014 Hardware
  • flashing 28C256 by diagnostic board?Is it possible to flash EEPROMs 28C256 by use of the diagnostic board? Which page I have to choose for address space #4000-#7FFF?

    ... make an adaptor for the 28C256 so that you can put ... /> As designed either the flash/EEPROM is paged in at 0x0000 ... the top 16k of the 28C256's 32k byte memory.
    28C256 compared to a AMD Am29F010 ...
    1024MAK 1024MAK December 2016 Hardware
  • flashing 28C256 by diagnostic board?Is it possible to flash EEPROMs 28C256 by use of the diagnostic board? Which page I have to choose for address space #4000-#7FFF?

    The 28C256 ought to be easier as it's an eeprom rather than flash. That means that you don't have to worry about erase sector sizes etc. like with the 29F040 etc.
    guesser guesser December 2016 Hardware
  • NEW INTERFACE FOR ZX SPECTRUM!!Hi all zx-maniax! Here is a letter from Polish inventor, Yarek Adamski. He constructed a new brilliant interface for ZX SPECTRUM. Ready carrefuly i…

    ... a possibility to add 8kB EEPROM, used by
    ZXVGS.
    Yerz Yerz July 2003 Sinclair Miscellaneous
  • Help with +3 in comaHi everyone Had a spectrum +3 under the bed for some time and when replacing its drive i accidentally connected the 5v and the gnd of the led. Now…

    ... a friend to burn an eeprom?

    thanks

    odious odious August 2005 Sinclair Miscellaneous
  • ZXSpin 0.61 Available nowHi all! Well, after a lengthy few testing cycles, I'm taking the plunge and uploading the latest version of ZXSpin, to replace the rather aged old 0…

    ... import binaries into the DivIDE EEPROM/RAM pages.

    - Added ...
    Dunny Dunny December 2006 Emulators
  • problem with sinclair zx 48 issue 6aHi all, I have the following problem when I turn on my sinclair without rom inserted. [url]http://217.79.64.145/sinclair/5.jpg[/url] when I turn o…

    ...

    (i'm using eeprom 27128 and 27256)
    [url ...
    gorski gorski January 2007 Hardware
  • divIDE woesHi y'all ! Last night I built my lovely divIDE ;-) I downloaded flasher and +divide.tap from [url]http://www.biehold.nl/rudy/+divide/index.htm[/url…

    ... ;-(

    When flashing the EEPROM, it takes a good 20 ... happen? Could I have faulty eeprom, or GAL's (they're ...
    csmith csmith November 2007 Hardware
  • SAM Revival issue 20 out now! [SAM Coupe]Issue 20 of SAM Revival magazine was released at the end of February. [IMG]http://www.quazar.clara.net/qauctions/cgpsr20.jpg[/IMG] SAM Revival is t…

    ... include information on using the EEPROM that's onboard the Trinity ...
    Quazar Quazar March 2008 Announcements
  • Recently acquired divIDE 57cI recently got hold of a divIDE 57c (whilst waiting RWAPs divIDE plus to materialise...) I have installed the interface and powered up my zx spectr…

    ... is it worth changing the EEPROM and trying to flash some ...
    stevestorr stevestorr June 2009 Hardware
  • FLASH EPROM programming on ZXExist any other software for rewriting FLASH EPROM or EEPROM chips on real ZX ? I know only: EEPROM flasher for original DivIDE [url]http://85.132.…

    ... hl ; writing to RAM3 and EEPROM
    bit 6, h ; < ... of 8kB BIN image for eeprom
    or h ;
    ... ; write byte to target adress(eeprom/ram3)

    l_5cf4: ...
    velesoft velesoft July 2009 Hardware
  • DivIDE QuestionHi all, I've been trying to work out how the DivIDE works and after reading and re-reading the DivIDE programming model document by Zilog I think it…

    ... case it maps it's EEPROM in place of the standard ...
    garethadams garethadams August 2009 Development
  • The late running issue 23 of SAM Revival magazine is out now!The very late running issue 23 of SAM Revival magazine is out now! [img]http://www.quazar.clara.net/a40/sr23.jpg[/img] SAM Revival is the only new…

    ... into the Trinity's onboard EEPROM. The Developer Diary looks at ...
    Quazar Quazar April 2010 Announcements
  • FLASH EPROM programming on ZX SpectrumThis is photo of Winston's DIAGNOSTIC BOARD: [img]http://velesoft.speccy.cz/other/diagboard.jpg[/img] Schematic and flash utilities: [url]http://www…

    ... for other FLASH EPROM/PEROM/EEPROM to one universal FLASH UTILITY ... .tap[/url] (flasher for 8kB EEPROM on DIVIDE)
    [url]http ...
    velesoft velesoft May 2010 Hardware
  • Some ROM/EPROM questions...I've got a ZX Spectrum +, a +2A and +3 computers, and I've been using +3e project ROMS for a while in my +3. I was thinking about using an EEPROM or…

    ... was thinking about using an EEPROM or Flash memory to store ... to upgrade. Is there any EEPROM or flash memory "pin compatible ... />
    Also, there is any EEPROM or flash compatible with my ...
    Zup Zup June 2010 Hardware
<1234567…14>

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Related Threads

  • ROM replacement using 28C256 EEPROMThought I'd share a quick project I knocked up in order to use a 28C256 EEPROM in place of the standard 23128 ROM in the Spectrum.<br /> <br /> The c…
  • Replacing +2/+3 rom with eeprom?Hi<br /> <br /> I want to change my +2a to +3e (or +2e). Garry mentions that 27C256 eprom can be used. I would like to use 28C256 instead. Pins are n…
  • Divide Eeprom - Write Protect FeatureDivIDE interface can contain two types of eeprom chip:<br /> <br /> EEPROM AT28C64 (without write protection, always rewritable)<br /> [url]http://ww…
  • Divide: problems with SNA files and upgrading EEPROMHello everybody, I am new at the forum. My name is Fernando, first of all thank you to the admins to give me access and the opportunity to participat…
  • flashing 28C256 by diagnostic board?Is it possible to flash EEPROMs 28C256 by use of the diagnostic board? Which page I have to choose for address space #4000-#7FFF?

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