Britannia ROM Board
The ROM Plus is a ROM Board from Britannia Software Ltd.
It also features a cartridge slot (which never became a standard).
Pics
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Britannia ROM Plus
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Review 1/2 (ACU, 4/1986)
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Review 2/2 (ACU, 4/1986)
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Advert (ACU Nov 1985)
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The Rom Plus, open
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The Rom Plus, plugged in
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Boot message
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Another shot
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Top board side
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Connector
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ROMPlus Top
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ROMPlus Bottom
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ROMPlus PCB Top
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ROMPlus PCB Bottom
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Downloads
ROM revisions, posted by Johnny Olsen:
Note: the actual versions are 1.6 and 1.7, not 1.06 and 1.07.