Recent content by Airdorn

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    How do I reset master code for Omni Pro II ?

    That's the one. It can read/program all ROMs, EPROMs, EAROMS, and EEPROMs from the late 70s onward, PALs, GALs, etc as long as the security bit isn't set. It can't do the old bipolar ROMs from the early days so you're not going to be able to read/write the old Ademco 610 dialer PROM, oh well. :)...
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    bought house with omni iie, now what?

    The installer code is stored at location 0x2859 (First 2 digits) and 0x285A (Last 2 digits) in EEPROM. It is a socketed 28c256 that can easily be read with any decent EPROM programmer.
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    How do I reset master code for Omni Pro II ?

    I know this is a very old thread but I thought others might benefit from this information about the Omni Pro II. If you have access to an EPROM programmer then finding the installer's code is very straightforward and easy. The Omni Pro II uses a 28c256 256k EEPROM that, as we all know, has no...
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