![]() Model A and B BBC Micro computers were designed to take 8k byte (2764 or 27C64) and 16k byte (27128 or 27C128) EPROMs and pin compatiable PROM and ROM chips. That is why, with an EPROM, the erase button is greyed out. Both of which can be erased electrically. The programmer can also program EEPROMs and Flash memory chips. ![]() Thanks so much for any help that can be offered.ĮPROM chips can only be erased by UV light. The reason for the questions is that when I put the chips in my Beeb, they were not recognized at all, either through *HELP or *ROMS. If I could have ideas on this it would be most useful.Īre the voltages correct for this type of burn? The program help says I can erase the chip but it seems the erase portion is greyed out. The programmer said the burn was successful and I've posted a picture showing the first bits of the chip after burning.Ī couple of questions as this is my very first time using any eprom burner.Īm I correct in using binary to burn the chip? I did this using binary no hex which is what I would expect to be using. ![]() I've tried burning Logo onto them (AcornSoft Logo1 and Logo2). Some USB powered programmers do not always reliably program the 21V types. Older obsolete type EPROMs (27128 types) use either a 21V or a 12.5V programming voltage depending on when and by who they were produced. Universal-Ģ7C256 use a 12.5V programming voltage and program okay using USB powered programmers. 1024MAK wrote:Earlier this year I got this "Universal miniPRO EPROM EEPROM FLASH Programmer TL866CS High speed AVR" but have not really put it through it's paces yet (as it means I need to power up a Windows PC). ![]()
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