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The MegaROM is a low-cost replacement for a standard ROMBoard, but rather than using an array of 16k 16 kb EPROMs as traditional ROMBoards use, the MegaROM uses a single 8x128k (1Mbit) or 8x256k (2Mbit) EPROM (or Flash EPROM) divided into 16k 16 kb blocks. This not only reduces the size of the device significantly, but due to the fact that 16k 16 kb EPROMs are a dying breed, it is much easier and cheaper to find a single 8x256k EPROM than buy sixteen 16k 16 kb EPROMs.

The original idea for complete hardware of the MegaROM was developped by [[User:Bryce|Bryce]] of [[FutureSoft]]. The original idea came from discussions with [[TFM/FS]] of [[FutureSoft]]. The main goals being that it would offer up to 16 ROM positions, be very low cost and be a single-sided PCB design so that it could be easily built by most electronic hobbyists.