▁June ▁ 1 9 8 6 ▁in ▁Cambridge , ▁England ▁by ▁Alan ▁Mil es ▁and ▁Bruce ▁Gordon , ▁former ▁employees ▁of ▁S inc la ir ▁Research , ▁ ▁after ▁S inc la ir ▁sold ▁the ▁rights ▁for ▁the ▁Spect rum ▁to ▁Am str ad . ▁They ▁moved ▁to ▁Sw anse a , ▁Wales , ▁in ▁May ▁ 1 9 8 9 , ▁became ▁a ▁public ▁company ▁in ▁July ▁ 1 9 8 9 ▁and ▁went ▁into ▁receiver ship ▁in ▁June ▁ 1 9 9 0 . ▁ ▁The ▁DIS C i P LE ▁and ▁+ D ▁ ▁As ▁the ▁Z X ▁Spect rum ▁became ▁h ug ely ▁popular , ▁the ▁lack ▁of ▁a ▁mass ▁storage ▁system ▁became ▁a ▁problem ▁for ▁more ▁serious ▁users . ▁While ▁S inc la ir ' s ▁response , ▁the ▁Z X ▁Interface ▁ 1 ▁and ▁Z X ▁Micro drive , ▁was ▁very ▁cheap ▁and ▁techn olog ically ▁innov ative , ▁it ▁was ▁also ▁rather ▁limited . ▁Many ▁companies ▁developed ▁interfaces ▁to ▁connect ▁flo ppy ▁disk ▁drives ▁to ▁the ▁Z X ▁Spect rum , ▁one ▁of ▁the ▁most ▁successful ▁being ▁the ▁Op us ▁Disc overy ; ▁however , ▁these ▁were ▁all ▁to ▁some ▁degree ▁in compatible ▁with ▁S inc la ir ' s ▁system . ▁ ▁M GT ' s ▁approach ▁was ▁different . ▁It ▁produced ▁two ▁different ▁flo ppy - disk ▁interfaces ▁for ▁the ▁Spect rum , ▁first ▁the ▁DIS C i P LE ▁( market ed ▁by ▁Rock fort ▁Product s ) ▁and ▁later ▁the ▁cut -