Comment on Inside the 1040STparentComments−empressplay3yThere were upgrade boards that let you have multiple TOS ROMs so that you could keep TOS 1.0 (which was compatible with more games than 1.4 etc)
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There were upgrade boards that let you have multiple TOS ROMs so that you could keep TOS 1.0 (which was compatible with more games than 1.4 etc)