ROM emulator


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ROM emulator

A circuit that helps debug a ROM chip by simulating the ROM in RAM (memory). The RAM circuit plugs into the ROM socket, and because RAM can be rewritten and ROM cannot, programming changes can be easily made and tested. See ROM and ROMable.
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Several companies that manufactured ISA bus cards such as DMMs, universal time interval counters, and ROM emulators created 3U and 6U PXI versions of their products.
The primary shortcoming of ROM emulators is the inability to diagnose the processor to boot ROM area.