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<1…567891011…34>
  • 5th International Sinclair & Sam Days, Urmond NLTook a trip to Urmond (NL) on Saturday to check out the 5th International Sinclair & Sam meeting. It proved to be an interesting afternoon, spent wit…

    ... on.

    Since the eprom wasn't blinded the light ... also went into the eprom. Direct after the foto the ... another picture and on another eprom the ROM crashed completely.
    Dave_C Dave_C April 2005 Sinclair Miscellaneous
  • Swedish SPectrum ROM foundFrom a contributor to my inbox: [quote] Went to a flea market today to look for old computers and found a rubber-key Speccy. Didn't really look at i…

    ... that you cannot place an eprom directly in a spectrum, unless ... altered.

    An external eprom can be placed easily.
    Fraser Fraser April 2005 Development
  • Investronica Inves Spectrum +Hi, Has anyone here ever heard of the Investronica Inves Spectrum +? This site [url="http://www.silicium.org/uk/sinclair/inves.htm"]http://www.sili…

    ... stored in a 16 Kb EPROM (model 27128), meaning it could ... both chips are unused (the EPROM is mapped in that area ...
    na_th_an na_th_an June 2005 Sinclair Miscellaneous
  • Help with dead Spectrum +2aHello. My Spectrum +2a died some time ago. It was powered on, I looked away and next time I looked at it, screen was black. I have replaced the 4 r…

    ... you have access to an EPROM burner it may be worth ...
    Spirantho Spirantho July 2005 Sinclair Miscellaneous
  • Help with dead Spectrum +2aHello. My Spectrum +2a died some time ago. It was powered on, I looked away and next time I looked at it, screen was black. I have replaced the 4 r…

    ... you have access to an EPROM burner it may be worth ... try. I have just bought EPROM burner to change +2a to ...
    Timppa Timppa July 2005 Sinclair Miscellaneous
  • Spectrum IDE port addressesWith eight standard IDE ports to address and with the common access to information via the internet I would have thought that Spectrum IDE add-on har…

    ... . The main difference is the EPROM (i think) which is a ...
    icabod icabod July 2005 Development
  • 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…

    ... have loads of spare 27C256 EPROM's. If you want a ...
    KeepGood KeepGood August 2005 Sinclair Miscellaneous
  • 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…

    ... have loads of spare 27C256 EPROM's. If you want a ... good to reason to purchase eprom burner. I also had several ... burner I found out that eprom (27c256) needs to be erased ...
    Timppa Timppa August 2005 Sinclair Miscellaneous
  • 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…

    Home made on the cheep eprom eraser

    [url="http://www.siliconchip.com.au/cms/A_104058/article.html"]http://www.siliconchip.com.au/cms/A_104058/article.html[/url]
    dasteph dasteph August 2005 Sinclair Miscellaneous
  • 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…

    ... use pretty much any 8bit eprom. I have successfully used loads ... plan to use a larger eprom like a 27e512 or something ... matter what page in the eprom that its using it will ...
    KeepGood KeepGood September 2005 Sinclair Miscellaneous
  • Want a Speccy Repaired?Maybe it's time to put my 'skills' to use.... Now that I've sourced some of the nastier transistors, I've fixed about 6 rubber keyed Speccys in the …

    ... could be done with an EPROM and a bit of wire ...
    Spirantho Spirantho September 2005 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…

    ... well as my special diagnosis EPROM. I'd need you to ... you have access to an EPROM burner, the source and binary ...
    Spirantho Spirantho September 2005 Sinclair Miscellaneous
  • nec780 vs z80aHi everyone! Got a 48k issue 2 board with nec780 with a mts2369 at its back.(spider?) Between pin 11 of the cpu and pin 14 of ic 23 theres a resis…

    ... you have access to an EPROM burner:
    [url="http://www ...
    Spirantho Spirantho September 2005 Sinclair Miscellaneous
  • Want a Speccy Repaired?Maybe it's time to put my 'skills' to use.... Now that I've sourced some of the nastier transistors, I've fixed about 6 rubber keyed Speccys in the …

    ... an 8K EPROM, and switch this EPROM with a Multiface EPROM - no soldering ...
    Spirantho Spirantho September 2005 Sinclair Miscellaneous
  • Which assembler to useHello again, another question. As I just started fiddling with assembler I used whatever tools were in front of me. In this case, the built-in assem…

    ... can load later in an EPROM.

    Example program
    Dr BEEP Dr BEEP September 2005 Development
  • Want a Speccy Repaired?Maybe it's time to put my 'skills' to use.... Now that I've sourced some of the nastier transistors, I've fixed about 6 rubber keyed Speccys in the …

    ... you have access to an EPROM burner, then burn the TestSpec4 ... you don't have an EPROM burner, I may be able ...
    Spirantho Spirantho September 2005 Sinclair Miscellaneous
  • 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!

    ... few other posts also regarding eprom to 48k.

    [ This ...
    Timppa Timppa October 2005 Sinclair Miscellaneous
  • 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!

    An EPROM will [I]not[/I] work ...
    Spirantho Spirantho October 2005 Sinclair Miscellaneous
  • 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!

    ... but active high on an Eprom.

    Many thanks to ...
    Lloyd Lloyd October 2005 Sinclair Miscellaneous
  • Hardware pics wantedWe're looking for real life photographs of all hardware items and their packaging (if nice). There are many items I've never seen and I assume that w…

    ... the ROM can be an EPROM, but how to re-design ...
    DEATH DEATH November 2005 Hardware
  • RTC on my speccy?Hi guys, As much as I've not got much time to work on my Speccy (right now) I still like to come up with some funky ideas for stuff to do to it. I …

    ... , a battery and a small eprom (MCU if needed) and have ... current time that in the eprom as a string then display ... bit of information in an eprom that the speccy can read ...
    KeepGood KeepGood November 2005 Hardware
  • ZX-PC InterfaceRight - i'm 34 and I cant take the pain of waiting for tapes to load any more - somethings gotta give ( either the tape deck or me ). I've seen a 'Z…

    ... that the interface has an EPROM onboard that is a slightly ...
    KeepGood KeepGood November 2005 Hardware
  • ZX-PC InterfaceRight - i'm 34 and I cant take the pain of waiting for tapes to load any more - somethings gotta give ( either the tape deck or me ). I've seen a 'Z…

    ... that the interface has an EPROM onboard that is a slightly ... must replace the eprom with a 32K
    eprom,including the 16K ...
    Dr BEEP Dr BEEP November 2005 Hardware
  • ZX-PC InterfaceRight - i'm 34 and I cant take the pain of waiting for tapes to load any more - somethings gotta give ( either the tape deck or me ). I've seen a 'Z…

    ... your 48K, there is an EPROM on the interface that holds ... ) if you use a 27C256 EPROM and program it with the ...
    KeepGood KeepGood December 2005 Hardware
  • ZX-PC InterfaceRight - i'm 34 and I cant take the pain of waiting for tapes to load any more - somethings gotta give ( either the tape deck or me ). I've seen a 'Z…

    ... your 48K, there is an EPROM on the interface that holds ... ) if you use a 27C256 EPROM and program it with the ... that ROM-file). A 32K Eprom containing the origal ROM and ... on pin 27 of the eprom (connected to A14).

    Dr BEEP Dr BEEP December 2005 Hardware
  • Are the Prism VTX5000 modems any use nowadays?There's one currently up on ebay. Do the old bulletin boards still exist or is the modem essentially useless today? Necros.

    I once linked two Spectrums with VTXes together and made a simple P2P network.

    IIRC you could take out the Prestel ROM chip and replace it with an EPROM so it ran your code on boot-up.
    alchresearch alchresearch December 2005 Hardware
  • ZX ShedNow that issue 2 is out and it's fairly obvious it's been a great success, we have to start considering issue 3. Thanks in part to the quality of wri…

    ... have people on here with EPROM programmers and the knowledge to ...
    DEATH DEATH December 2005 Sinclair Miscellaneous
  • dK'Tronics 4K Graphics ROMHi, I've got a working 4K graphics ROM fitted (today) in my ZX81 (yay!). I'd like to put a RAM chip (battery-backed) in the socket provided, howeve…

    OK, here's my analysis of the board:

    There are nine little holes in the board, which provide the links.
    The board has a 74LS138 3-to-8 decoder and 74LS21 4-way AND gate.

    The holes are connected as follows:

    1 2 3 ...
    hldswrth hldswrth January 2006 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!

    ... /ability to program these 27128 Eprom chips? And, more importantly to ...
    DEATH DEATH January 2006 Sinclair Miscellaneous
  • 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!

    ... /ability to program these 27128 Eprom chips? And, more importantly to ... ]

    I bought a eprom programmer last year, it is ...
    Timppa Timppa January 2006 Sinclair Miscellaneous
<1…567891011…34>

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