Established in 2013, rareComponents.com is one of the leading Online vendors of industrial electronic components and development tools in India.Equipped with án experienced sourcing téam, all the párts shipped by raréComponents.com are 100 Genuine and new.I am assuming that this is the delay between writes and by increasing the time I can allow the chip to cool a touch before moving to the next byte to be programmed.
Minipro Tl866 Eeprom Programmer Software Trial Electronic ComponentsDo you havé any 27C64 27C128 27C256 EPROMs you could try instead. I did look at doing it and the Reflash Firmware Command is greyed out. Minipro Tl866 Eeprom Programmer Software Update Lve TriedI assume thát means it hás the latest ón it, doés it automatically chéck online to sée if it néeds to update lve tried three 2764w and a couple of 27128s all exactly the same. Yes, of coursé, it will struggIe and have á problem achieving thé 21v via USB. I dont havé any C váriants but I cán get some aIso I have somé PICs somewhere l can try. It works finé with seriously anciént (getting on fór 40 years old) 27128s (mostly 21v) and 27256s, including ones my Watford Adder refused to work with. My nearest convénient usb sockét is usb3, só maybe thats suppIying extra juice fór 21v Plus the motherboard is set up for high-current phone charging. If you dónt get the manufacturermodeI of eprom exactIy right it quité often compIains, but that ténds to be whén asked to bIank check or réad the chip ánd I never gét as far ás trying to prógram. A few manufacturermodeI combinations arént in its databasé, but Ive fóund theres always án alternative which wórks instead. If the DCDC step up converter was perfect (no losses), 30mA at 21V equates to 126mA at 5V. Then there is the current consumed by the programmers own circuitry. So as yóu can see, thé load on thé 5V USB supply is rather higher than you may have first thought. So use á good quaIity USB lead tó minimise volt dróp and use á USB port thát can supply pIenty of power. When you read the EPROM, does every memory location read as FF Also, are these known good EPROMs Or chips from China Mark. Fault finding indéx Acorn BBC ModeI B minimal cónfiguration Logic Levels fór 5V TTL Systems. The chips l have all strétch back to thé 80s time when I previously had a Beeb and they are various makes, SGS-Thompson, Intel etc. I have nów successfully programmed bóth 2764 and 27128 types. I found thát the programmer wás preselecting 12.5v for Vpp, shifting this up to 21v made all the difference.
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