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<1234567…34>
  • 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…

    ... 'll ever change the ROM, but it may happen ... my own ROM cartridge using a "big" ROM with a ... br />
    - One 128kx8 EPROM with a scavenged SCSI ID ... />
    - One 256kx8 EPROM with a 4 bit counter ... I have problems switching ROM programs without powering down ...
    Zup Zup June 2010 Hardware
  • 48K Issue 3B ROM to EPROM methodsHi folks, While fixing up a completely dead Commodore PET I needed a way of testing the 4116 RAM chips that make up its 32K, some googling found a…

    ... 27c256 EPROM containing the 48K ROM and a diagnostic ROM from ... found of doing the ROM - EPROM replacement, either the diode ... pin 20 of the EPROM or using a ... />
    Sanity check ROM burner (MQP Pinmaster 48) ... the 27c256 with stock ROM (previous attempt had ...
    witchy witchy December 2015 Hardware
  • 48K ROM/EpromAnybody know if the 27C128 Eprom will work in a 48K machine withut modifications? If not, what mods do I need to make? Ta!

    Anybody know if the 27C128 Eprom will work in a 48K machine withut modifications? If not, what mods do I need to make?

    Ta!
    Lloyd Lloyd October 2005 Sinclair Miscellaneous
  • Sinclair 128K+ Rom dead?While repairing one of these boards my mind was elsewhere and I put the rom back in the wrong way round and now it doesnt work (scrambled screen) alt…

    ... elsewhere and I put the rom back in the wrong way ... 128+ had an 'eprom' rather than a rom right? Which means its ... br /> Is it a rom or an eprom and if it is ... an eprom can it be re programmed? ... can anyone supply a working rom/eprom? For now i replaced it ...
    ZX-MAD ZX-MAD April 2008 Hardware
  • My own Home Computer It's true. My company are planning to build a new Home Computer. It will use a Z80 CPU running at 6mhz, 128k Ram and will run all Spectrum and ZX81 …

    ... br />
    Standard RAM/ROM/EPROM

    Preliminary ideas ... Spectrum cloning mode. EPROM activates advanced mode.
    EPROM. The EPROM could provide support for activating emulated ROM ... /> D0 - if reset EPROM is in place, else ports ...
    cyborg cyborg October 2002 Sinclair Miscellaneous
  • Spectrum 48K ROMHi Can anybody help I have an Issue 6a Circuit Board which has a faulty ROM Chip. Is it possible to program a ROM Chip with the 48K ROM and fit it as…

    ... which has a faulty ROM Chip. Is it possible ... the ROM [I]can[/I] be replaced with an EPROM, ... magazine about changing Spectrum ROM with an EPROM.
    The article ... select the make of ROM. It could be either ... simply lifted one of the ROM/EPROM pins ( so they don ...
    Marcelo Marcelo April 2007 Hardware
  • TC2068 emulator cart - problemHi, Sorry for posting timex related stuff on a spectrum forum. So, this cart (spectrum emulator) can only adress 16K. I can load small games but i …

    ... pin 8 and connected to eprom (CE) / rom pin 20
    pin ... 27 of the rom OR pin 28 of the eprom (VCC) - (the ... 1 and 28 of the rom/eprom and pin

    OK ...
    odious odious May 2007 Hardware
  • TC2068 emulator cart - problemHi, Sorry for posting timex related stuff on a spectrum forum. So, this cart (spectrum emulator) can only adress 16K. I can load small games but i …

    [QUOTE=odious;190311]
    pin 14 - connects to ROMCS of the cart slot and pin 1 and 28 of the rom/eprom and pin[/QUOTE]

    Pin 14 is VCC ...
    Gods Gods May 2007 Hardware
  • TC2068 emulator cart - problemHi, Sorry for posting timex related stuff on a spectrum forum. So, this cart (spectrum emulator) can only adress 16K. I can load small games but i …

    ... pin 8 and connected to eprom (CE) / rom pin 20
    pin ... 27 of the rom OR pin 28 of the eprom (VCC) - (the ... 1 and 28 of the rom/eprom and pin
    [/QUOTE]
    eprom (pin 22) not pin 27 ...
    Alcoholics Anonymous Alcoholics Anonymous May 2007 Hardware
  • Faulty +2 Grey :(Hello everyone... i was trying to fix a +2 grey board the other day, i had it for some time now. It gave a black screen (paper and border) with two …

    ... another with a memory testing rom for 128 k machines ( ...
    I installed the 48k eprom on a speccy following the ... .speccy.org/trastero/cosas/JL/ROM-EPROM/ROM-EPROM.html[/url]
    worked ... no cables whatsoever.... and the eprom chip can be removed/replaced ...
    gtsamour gtsamour November 2007 Hardware
  • Faulty +2 Grey :(Hello everyone... i was trying to fix a +2 grey board the other day, i had it for some time now. It gave a black screen (paper and border) with two …

    ... ;229336]I installed the 48k eprom on a speccy following the ... .speccy.org/trastero/cosas/JL/ROM-EPROM/ROM-EPROM.html[/URL]
    worked like ... , no cables whatsoever.... and the eprom chip can be removed/replaced ...
    Marcelo Marcelo November 2007 Hardware
  • Where shall I start to look ?I got hold of a faulty 48k, Issue 6. It displays a picture like shown below: [URL]http://www.gjelberg.no/miscpics/speccyfault.jpg[/URL] Some of the…

    ... .speccy.org/trastero/cosas/JL/ROM-EPROM/ROM-EPROM.html[/url]

    I ...
    gtsamour gtsamour December 2007 Hardware
  • Where shall I start to look ?I got hold of a faulty 48k, Issue 6. It displays a picture like shown below: [URL]http://www.gjelberg.no/miscpics/speccyfault.jpg[/URL] Some of the…

    You can buy a 27C128 eprom from any shop with electronics ... .speccy.org/trastero/cosas/JL/ROM-EPROM/ROM-EPROM.html[/url] ), there is ...
    "1. (blue line) Original ROM (16K): Connect track to GND ... yellow line) 27C256 (32K). This ROM can store an original ROMs ...
    gtsamour gtsamour December 2007 Hardware
  • TS2068 TAP, WAV, TZX files..Anyone know of a source for some of these files? I have a bunch of TS tapes but most are 'converted' speccy titles. I'd like to try some of the TS sp…

    ... .org/trastero/cosas/JL/CartuchosTimex/ROM-EPROM.html[/url]

    One ...
    zxbruno zxbruno January 2008 Sinclair Miscellaneous
  • sinclair zx spectrum issue 6a (again) - how to repairHi All, Is there someone who may explain what these jumpers can be used for. [url]http://forest.no-ip.org/repair/jumpers.gif[/url] <- this is from …

    Seems to be another EPROM-mod that the one I ... .speccy.org/trastero/cosas/JL/ROM-EPROM/ROM-EPROM.html[/URL]

    I ... nasty feeling that maybe the ROM mod is not done right ... when I had a faulty ROM.
    Pilsener Pilsener February 2008 Hardware
  • sinclair zx spectrum issue 6a (again) - how to repairHi All, Is there someone who may explain what these jumpers can be used for. [url]http://forest.no-ip.org/repair/jumpers.gif[/url] <- this is from …

    ... 245302]Seems to be another EPROM-mod that the one I ... .speccy.org/trastero/cosas/JL/ROM-EPROM/ROM-EPROM.html[/URL]
    [/QUOTE]< ... :-)

    To put a eprom in a Spectrum 48k, the ... speccy.org/trastero/cosas/JL/ROM-EPROM/imagenes/puente_original-2.jpg[/url ...
    Jose_Leandro Jose_Leandro February 2008 Hardware
  • sinclair zx spectrum issue 6a (again) - how to repairHi All, Is there someone who may explain what these jumpers can be used for. [url]http://forest.no-ip.org/repair/jumpers.gif[/url] <- this is from …

    ... :
    all is right with eprom. I used
    [url] ... .speccy.org/trastero/cosas/JL/ROM-EPROM/ROM-EPROM.html[/url]
    see new ... />
    many thanks for your eprom mod :) i used on my ... speccy.org/trastero/cosas/JL/ROM-EPROM/imagenes/puente_original-2.jpg[/url ...
    gorski gorski February 2008 Hardware
  • Replacing original 48k roms with...Hi, is it possible to replace (without serious hardware modifications) the original 16k ROM on a Spectrum 48k with an Eprom programmed with ROM take…

    It can be done nice and easily

    [url]http://www.speccy.org/trastero/cosas/JL/ROM-EPROM/ROM-EPROM.html[/url]

    good luck with the Spanish.... i figured out what to do without learning spanish tho...
    gtsamour gtsamour March 2008 Hardware
  • Replacing original 48k roms with...Hi, is it possible to replace (without serious hardware modifications) the original 16k ROM on a Spectrum 48k with an Eprom programmed with ROM take…

    ... .speccy.org/trastero/cosas/JL/ROM-EPROM/ROM-EPROM.html[/url]

    good ... />
    More ideas for 48K rom

    - A cartridge for ... me to have two diferent rom. You can see the same ...
    Jose_Leandro Jose_Leandro March 2008 Hardware
  • MB02+ software and system developmentsThe following text was (before last modification) first published here: [url]http://www.sintech-shop.com/forum/board.php?boardid=20[/url] As discuss…

    ... + memory paging (512kB version without rom support or full 1MB version ... with 512kB SRAM+next 512kB rom/ram)[/QUOTE]

    This ... ResiDOS only supports SRAM, not ROM/EPROM/FlashROM, so adding this would ...
    glancaster glancaster April 2008 Development
  • MB02+ software and system developmentsThe following text was (before last modification) first published here: [url]http://www.sintech-shop.com/forum/board.php?boardid=20[/url] As discuss…

    ... ResiDOS only supports SRAM, not ROM/EPROM/FlashROM, so adding this would ... + RAM PAGES:
    0=bs-rom(modified ZX48rom)
    1=bd ...
    velesoft velesoft April 2008 Development
  • issue 6a faultyHi All I got issue 6a pcb from ebay with status faulty pcb had bad voltages when I power up I changed tr4 ztx650 and all voltages got back on ic6 I h…

    ... think repaired

    about rom i received with mod for ... .speccy.org/trastero/cosas/JL/ROM-EPROM/ROM-EPROM.html[/url]
    this working ... is my fav mod for eprom and put my 27256
    gorski gorski March 2009 Hardware
  • DRAM without powerSomething interesting I noticed last night, after making a bad Spectranet ROM image which crashed the machine... Looking at the image on the screen,…

    ... enables it to act as ROM. Bank 3 is paged in ... -1FFFh either automatically upon reaching ROM entry point or instantly if ... by setting CONMEM. That is, ROM/EPROM/EEPROM will be mapped to ...
    RST#08 RST#08 May 2009 Hardware
  • Photos of MODIFIED ZX SpectrumsIf you have ZX Spectrum/clone with any modification(s), please release photos: (or send me your photos to --SPECCY(a)SEZNAM.CZ--, I upload all to my …

    ... .speccy.org/trastero/cosas/JL/ROM-EPROM/ROM-EPROM.html[/url]
    I have ... 2 bank's of 27256 eprom
    work perfect :)(even I ...
    gorski gorski June 2009 Hardware
  • Mass storage - why backup battery?I wasn't sure to post this under "hardware" or "development", but here goes: There are these mass storage devices for ZX Spectrum, and on many desig…

    Whether it be RAM or ROM has nothing to do with ... Spectrum. Whether you have RAM, ROM or anything else, there is ... memory map where the main ROM would be.

    ResiDOS ... , some use some type of ROM (EPROM, EEPROM or flash). It's ...
    Winston Winston February 2010 Hardware
  • Am27c2001Hi, maybe someone can help me. I own a IF2 Cartd. from Paul Farrow. It works well until 128kb.EPROM but I have some IC's with 256kb and I want to us…

    See also this thread, where a similar subject is brought up: [URL]http://www.worldofspectrum.org/forums/showthread.php?t=20047&highlight=rom+eprom[/URL]
    Pilsener Pilsener December 2010 Hardware
  • 2 48K speccys dead..Hey guys! I've got two of our rubbery friends with me that need some help. They've been like this for some time, but I would like to try and fix th…

    Here's the guide for replacing the ROM with an EPROM:
    [URL]http://www.speccy.org/trastero/cosas/JL/ROM-EPROM/ROM-EPROM.html[/URL]

    It's in Spanish, but one of the translator-sites will help you.
    Pilsener Pilsener February 2011 Hardware
  • 2 48K speccys dead..Hey guys! I've got two of our rubbery friends with me that need some help. They've been like this for some time, but I would like to try and fix th…

    ... guide for replacing the ROM with an EPROM:
    [URL]http://www ... .speccy.org/trastero/cosas/JL/ROM-EPROM/ROM-EPROM.html[/URL]

    It ...
    Diogo Diogo February 2011 Hardware
  • Help with Spectrum 128k reparationHi! I have the following symptoms with a 128k unit version 6U - On power on, black and white bars (one char width each), white background - Once po…

    ... /> You will need a special ROM for memory testing. I don ... , you have to remove the ROM (EPROM actually) chip, lift up pin ... RAM, and the special tester ROM will be needed.
    mcleod_ideafix mcleod_ideafix September 2011 Hardware
  • Internal ROM expansionHas anybody designed a multiple-ROM interface that plugs into the internal ROM socket instead of plugging onto the edge connector? It would be useful…

    This well-known article describes the use of an EPROM as a dual ROM on 48k: [URL]http://www.speccy.org/trastero/cosas/JL/ROM-EPROM/ROM-EPROM.html[/URL]
    Pilsener Pilsener February 2012 Hardware
<1234567…34>

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  • 48K ROM/EpromAnybody know if the 27C128 Eprom will work in a 48K machine withut modifications? If not, what mods do I need to make?<br /> <br /> Ta!
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