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<1…10111213141516…34>
  • 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 …

    ... />
    So, i swapped the eprom with a speccy rom, changed ... />
    It was the fecking eprom that was partially damaged. :P
    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 …

    ... pin 6 connects to the EPROM's chip enable, you're ...
    Winston Winston 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
    eprom (VCC) - (the pcb has a ... 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
    eprom (VCC) - (the pcb has a ... and 28 of the rom/eprom and pin
    [/QUOTE]
    eprom (pin 22) not pin 27 ...
    Alcoholics Anonymous Alcoholics Anonymous 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 …

    ... the /oe pin on the eprom (pin 22) not pin 27 ...
    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 …

    ... as is with a 27128 EPROM installed. The designer clearly had ... pin 20 (/CE) underneath the EPROM. Then run a jumper connecting ... through-hole nearby underneath the EPROM that connects to pin 6 ... prevent bus conflicts between the EPROM and z80 if the program ...
    Alcoholics Anonymous Alcoholics Anonymous 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 …

    ... this cartridge with a 27128 EPROM? I ask because you have ... as is with a 27128 EPROM installed. The designer clearly had ... 23128 ROM or a 27128 EPROM (I assume you are supposed ... board to select the E (eprom) or R (rom) connection at ...
    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 …

    Instead of trying another eprom, i replaced the 74ls32 for a 74HCT32N. Well, it worked. Now the cart is working correctly with the solder pads on the E position. No modifications done.

    Thanks! :)
    odious odious May 2007 Hardware
  • Unconventional way of diagnosing a faultHi everyone Some time ago I got a 48k Spectrum (issue 3B board) in a pretty bad condition. I believe the power supply transistor TR4 failed, causing…

    ... into replacing ROM with an EPROM - I have here an old ...
    Avian Avian May 2007 Hardware
  • Unconventional way of diagnosing a faultHi everyone Some time ago I got a 48k Spectrum (issue 3B board) in a pretty bad condition. I believe the power supply transistor TR4 failed, causing…

    Winston, do you have an Eprom programmer? Somebody needs to start ...
    DEATH DEATH May 2007 Hardware
  • Unconventional way of diagnosing a faultHi everyone Some time ago I got a 48k Spectrum (issue 3B board) in a pretty bad condition. I believe the power supply transistor TR4 failed, causing…

    I don't have an eprom programmer - I've been using ...
    Winston Winston May 2007 Hardware
  • Unconventional way of diagnosing a faultHi everyone Some time ago I got a 48k Spectrum (issue 3B board) in a pretty bad condition. I believe the power supply transistor TR4 failed, causing…

    ... 've programmed an old 27128 EPROM and installed it according to ...
    Avian Avian June 2007 Hardware
  • Kempston printer interfaceHi all, I won an Kempston Printer Interface from eBay and I am awating the arrival of it. At present I got hold of a Spectrum Plus2B today working or…

    ... either - its got an onboard EPROM with them on it (I ...
    hldswrth hldswrth June 2007 Hardware
  • Kempston printer interfaceHi all, I won an Kempston Printer Interface from eBay and I am awating the arrival of it. At present I got hold of a Spectrum Plus2B today working or…

    ... either - its got an onboard EPROM with them on it (I ... /> If that interface has an Eprom, it's almost certainly not ...
    DEATH DEATH June 2007 Hardware
  • Eprom blowerdoes anyone know a site with plans for an eprom programmer project that'll blow 27C256s. I attempted to build one called Kisseprom, but the software …

    You should be able to buy one from Ebay for 20 - 30 quid.

    STP has details too, from an old Everyday Electronics mag, PM him :)

    [url]http://www.worldofspectrum.org/forums/showthread.php?t=13121&highlight=eprom+programmer[/url]
    DEATH DEATH July 2007 Hardware
  • Eprom blowerdoes anyone know a site with plans for an eprom programmer project that'll blow 27C256s. I attempted to build one called Kisseprom, but the software …

    ... summer really, I need an eprom blower, and money isn't ...
    guesser guesser July 2007 Hardware
  • Eprom blowerdoes anyone know a site with plans for an eprom programmer project that'll blow 27C256s. I attempted to build one called Kisseprom, but the software …

    someone told me he replaced a blown rom with an eprom without any modification and it worked fine. Is that possible?
    I mean, if you install the eprom on the board and it boots ok, does that mean its working ok?
    gtsamour gtsamour July 2007 Hardware
  • Eprom blowerdoes anyone know a site with plans for an eprom programmer project that'll blow 27C256s. I attempted to build one called Kisseprom, but the software …

    ... a blown rom with an eprom without any modification and it ... mean, if you install the eprom on the board and it ... of mine working with an Eprom.
    DEATH DEATH July 2007 Hardware
  • Eprom blowerdoes anyone know a site with plans for an eprom programmer project that'll blow 27C256s. I attempted to build one called Kisseprom, but the software …

    ... 's has a Prom. An Eprom should work "as is", since ...
    DEATH DEATH July 2007 Hardware
  • Eprom blowerdoes anyone know a site with plans for an eprom programmer project that'll blow 27C256s. I attempted to build one called Kisseprom, but the software …

    ... a real reason to use EPROM (i.e. you have a ... around), don't bother using EPROM. Use flash instead - it shouldn ... to provide Vpp for an EPROM to make a Speccy based ... EPROM programmer (and much easier than ...
    Winston Winston July 2007 Hardware
  • Eprom blowerdoes anyone know a site with plans for an eprom programmer project that'll blow 27C256s. I attempted to build one called Kisseprom, but the software …

    Here's a very good eprom blower. Emphasis on the 'blower'.

    [url]http://www.electricstuff.co.uk/surge.html[/url]
    Winston Winston July 2007 Hardware
  • Eprom blowerdoes anyone know a site with plans for an eprom programmer project that'll blow 27C256s. I attempted to build one called Kisseprom, but the software …

    ... of how to build an eprom blower for the spectrum its ...
    Steve(spt) Steve(spt) July 2007 Hardware
  • Eprom blowerdoes anyone know a site with plans for an eprom programmer project that'll blow 27C256s. I attempted to build one called Kisseprom, but the software …

    ... a blown rom with an eprom without any modification and it ... mean, if you install the eprom on the board and it ...
    Steve(spt) Steve(spt) July 2007 Hardware
  • Eprom blowerdoes anyone know a site with plans for an eprom programmer project that'll blow 27C256s. I attempted to build one called Kisseprom, but the software …

    ... right corner of the (installed) eprom on a 48k speccy, is ...
    gtsamour gtsamour July 2007 Hardware
  • Eprom blowerdoes anyone know a site with plans for an eprom programmer project that'll blow 27C256s. I attempted to build one called Kisseprom, but the software …

    ... right corner of the (installed) eprom on a 48k speccy, is ... />
    One final point, my Eprom was a Hitachi make, which ...
    DEATH DEATH July 2007 Hardware
  • Eprom blowerdoes anyone know a site with plans for an eprom programmer project that'll blow 27C256s. I attempted to build one called Kisseprom, but the software …

    I got a Willem Eprom programmer from Ebay for around ?20, really good value for money and burns and verifies a 27256 in about six seconds.
    alchresearch alchresearch July 2007 Hardware
  • Eprom blowerdoes anyone know a site with plans for an eprom programmer project that'll blow 27C256s. I attempted to build one called Kisseprom, but the software …

    Now i'm even more confused. Is all this wiring with the SN74SL32N chip necessary? What if i only do the eprom wiring thing, will it work?
    gtsamour gtsamour July 2007 Hardware
  • Eprom blowerdoes anyone know a site with plans for an eprom programmer project that'll blow 27C256s. I attempted to build one called Kisseprom, but the software …

    ... if i only do the eprom wiring thing, will it work ...
    DEATH DEATH July 2007 Hardware
  • Poorly Spectrum + Fault diagnosis help needed!Hi, I've got a Spectrum+. Sometime in the past I broke it and sent it off to be fixed. It came back working good as new, but with an issue 2 board i…

    ... have a PROM, not an Eprom. I've never heard of ... Prom losing it's program.... Eprom being exposed to daylight, maybe ...
    DEATH DEATH July 2007 Hardware
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HitBox

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conmem 16 25
eprom 1.4K 2.2K

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