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<1…28293031323334>
  • 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…

    ... /CE and doing the complete Eprom selection by means of /OE ...
    bverstee bverstee November 2012 Hardware
  • windows 8 !!!!!!!!I've just tried windows 8 on a new laptop, and I hate it already ! You're not supposed to close windows anymore, just keep opening new ones and windo…

    Ditched Windows for Linux once I saw the state of Windows Vista - The only reasons I need to have Windows (XP) on my hard-disk at all now are FS2004 and my EPROM programmer's software.
    napoleonblownaparte napoleonblownaparte November 2012 Chit chat
  • ZX Spectrum + 2 128K - Video Issue?Hi All, I have just picked up a secondhand +2 and am having a problem with it. :( When I power the unit on and hook it up to my TV with the RF cable…

    ... kind of access to an EPROM burner? This is to prepare ...
    Falco-F8L Falco-F8L November 2012 Hardware
  • ZX Eprom replacing Rom problemsI got a programmer today so I could finally flash the Xicor X28C256 eproms I have with ZX128 rom, to be used in my upgraded 48K machine. But for some…

    ... of trying to use a EPROM in place of the Sinclair ...
    1024MAK 1024MAK December 2012 Hardware
  • ZX Eprom replacing Rom problemsI got a programmer today so I could finally flash the Xicor X28C256 eproms I have with ZX128 rom, to be used in my upgraded 48K machine. But for some…

    All you had to do was pull pin 27 away from the chip and solder a wire from it to pin 28. Connect the ROM select jumper straps to H(itachi).

    Pin 27 is active low on a ROM chip but active high on an Eprom.


    Micky
    -Micky -Micky December 2012 Hardware
  • ZX Eprom replacing Rom problemsI got a programmer today so I could finally flash the Xicor X28C256 eproms I have with ZX128 rom, to be used in my upgraded 48K machine. But for some…

    ... connected to pin 20 on eprom. It hooks up neatly where ...
    Johan1973 Johan1973 December 2012 Hardware
  • The new Superfo cloneHi In the spanish forum speccy.org some guys and me have optimized the superfo clon to have less ICs. The actual design has 39 ICs versus the 45 ICs…

    ... rom (disconnect /WR from flash eprom 128kB)

    - add button ...
    velesoft velesoft December 2012 Hardware
  • The new Superfo cloneHi In the spanish forum speccy.org some guys and me have optimized the superfo clon to have less ICs. The actual design has 39 ICs versus the 45 ICs…

    ... rom (disconnect /WR from flash eprom 128kB)[/QUOTE]

    That ...
    antoniovillena antoniovillena December 2012 Hardware
  • The new Superfo cloneHi In the spanish forum speccy.org some guys and me have optimized the superfo clon to have less ICs. The actual design has 39 ICs versus the 45 ICs…

    ... . If anyone erase full flash eprom chip then will possible boot ...
    velesoft velesoft December 2012 Hardware
  • The new Superfo cloneHi In the spanish forum speccy.org some guys and me have optimized the superfo clon to have less ICs. The actual design has 39 ICs versus the 45 ICs…

    ... . If anyone erase full flash eprom chip then will possible boot ...
    antoniovillena antoniovillena December 2012 Hardware
  • How far are we from a single-chip 100% ZX Spectrum compatible solution?I really like to read about the projects of some geniusses here on WoS who are working on their ZX Spectrum clones. IMHO some main steps that have b…

    ... CPU, a single flash or EPROM chip in place of the ...
    1024MAK 1024MAK December 2012 Hardware
  • TKMEM - the 128K interface for 16K SpectrumsHello all! Here in Brazil, we have made a small production of an interface, totally based on Velesoft?s memory expansion ([url]http://velesoft.speccy…

    ... also ROM chip connection (eprom/flash eprom can be connect parallel to ... memory socket (for sram+flash eprom) and next socket for AY ...
    velesoft velesoft December 2012 Hardware
  • SPECTRA New from Paul FarrowLooks good! Read about it [URL="http://www.fruitcake.plus.com/Sinclair/Spectrum/Spectra/SpectraInterface.htm"]here[/URL]

    ... real Spectrum instead of an eprom burner.
    zxbruno zxbruno December 2012 Sinclair Miscellaneous
  • SPECTRA New from Paul FarrowLooks good! Read about it [URL="http://www.fruitcake.plus.com/Sinclair/Spectrum/Spectra/SpectraInterface.htm"]here[/URL]

    ... real Spectrum instead of an eprom burner.[/QUOTE]

    Get ...
    BloodBaz BloodBaz December 2012 Sinclair Miscellaneous
  • What kind of Spectrum year was 2012 for you?2012 was for me a low Spectrum year, I coded just 1 game and that was only during the Spectrumdays in Cambridge. So on Spectrumfront it was low, but…

    ... design flaw in my latest eprom-rom/ram card interface.
    Knik Knik December 2012 Sinclair Miscellaneous
  • How to check the whole memory on a +2 greyHi everybody!!! I suspect that i have a bad memory chip on my +2 Grey. Does anybody know if exist any utility to check the whole memory? Thanks a …

    ... .

    Flashed on an eprom and its on a IF2 ... tester but you need an eprom flasher and not just that ...
    gtsamour gtsamour January 2013 Hardware
  • Adding IDE to your Spectrum +2 A/B (or +3)Hello my fellow [B]WoS'ers[/B] [B]This is a shared thread with [url]www.amibay.com[/url] which you can [URL="http://www.amibay.com/showthread.php?t=…

    ... ? Also, I see you offer EPROM programming, that might be useful!
    jamorski jamorski January 2013 Hardware
  • Adding IDE to your Spectrum +2 A/B (or +3)Hello my fellow [B]WoS'ers[/B] [B]This is a shared thread with [url]www.amibay.com[/url] which you can [URL="http://www.amibay.com/showthread.php?t=…

    ... ? Also, I see you offer EPROM programming, that might be useful ...
    guesser guesser January 2013 Hardware
  • Adding IDE to your Spectrum +2 A/B (or +3)Hello my fellow [B]WoS'ers[/B] [B]This is a shared thread with [url]www.amibay.com[/url] which you can [URL="http://www.amibay.com/showthread.php?t=…

    ... ? Also, I see you offer EPROM programming, that might be useful ...
    Zetr0 Zetr0 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…

    ... modified to carry a 27C128 eprom.

    Never encountered one ...
    gtsamour gtsamour 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…

    ... modified to carry a 27C128 eprom.

    Never encountered one ...
    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…

    I have some open computers, so will check for NEC ROMs.
    However most of TC2048 had EPROM chip, ROM was present only in early versions. BTW. Most of TC2048 have NEC Z80 processor.
    kpuchatek kpuchatek 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…

    ... the ROM and the divIDE EPROM/SRAM drive the data bus ...
    1024MAK 1024MAK 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…

    ... the ROM with a modern EPROM. However as a logic gate ...
    1024MAK 1024MAK 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…

    ... (Nec or otherwise) with an eprom unless it was damaged and ...
    gtsamour gtsamour 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…

    ... (Nec or otherwise) with an eprom unless it was damaged and ...
    1024MAK 1024MAK January 2013 Hardware
  • Checksum routine wantedI wish to make a program that verify integrity of a Multiface 1 ROM. It is possible to compare each byte of the ROM against a binary dump, but this i…

    ... />
    Brazilian Multiface clones use EPROM instead ROM. I had heard ... that old EPROM can lose data when aged ...
    TK90XFan TK90XFan February 2013 Development
  • Checksum routine wantedI wish to make a program that verify integrity of a Multiface 1 ROM. It is possible to compare each byte of the ROM against a binary dump, but this i…

    ... />
    However, if (say) the EPROM fades by losing the top ...
    Philip Kendall Philip Kendall February 2013 Development
  • Checksum routine wantedI wish to make a program that verify integrity of a Multiface 1 ROM. It is possible to compare each byte of the ROM against a binary dump, but this i…

    ... />
    However, if (say) the EPROM fades by losing the top ... accuracy is not enough for EPROM testing.
    TK90XFan TK90XFan February 2013 Development
  • Checksum routine wantedI wish to make a program that verify integrity of a Multiface 1 ROM. It is possible to compare each byte of the ROM against a binary dump, but this i…

    ... />
    However, if (say) the EPROM fades by losing the top ...
    Einar Saukas Einar Saukas February 2013 Development
<1…28293031323334>

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