▁target ▁coordinates ▁such ▁as ▁a ▁map , ▁and ▁some ▁way ▁to ▁call ▁for ▁fire . ▁ ▁This ▁resulted ▁in ▁a ▁combination ▁of ▁three ▁screens ▁which ▁the ▁user ▁could ▁f lip ▁back - and - for th ▁by ▁using ▁function ▁keys . ▁ ▁The ▁first ▁screen ▁showed ▁a ▁sim ulated ▁view ▁through ▁an ▁AN / G VS - 5 ▁las er ▁range find er . ▁ ▁The ▁map ▁screen ▁was ▁a ▁dep iction ▁of ▁the ▁fict ional ▁German ▁town ▁of ▁N itz burg ▁and ▁surrounding ▁area . ▁ ▁Last ly , ▁the ▁way ▁to ▁enter ▁firing ▁commands ▁was ▁a ▁virtual ▁AN / PS G - 2 ▁Digital ▁Message ▁Device ▁( D MD ). ▁ ▁The ▁virtual ▁D MD ▁required ▁extensive ▁programming ▁in ▁order ▁to ▁simulate ▁the ▁actual ▁operation ▁of ▁a ▁real ▁D MD ▁and ▁consum ed ▁most ▁of ▁the ▁program ▁code ▁space . ▁ ▁The ▁M ini TS FO ▁was ▁originally ▁c oded ▁in ▁B AS IC A , ▁an ▁interpreted ▁version ▁of ▁B AS IC ▁available ▁on ▁IBM ▁PC s . ▁ ▁As ▁the ▁design ▁of ▁the ▁program ▁was ▁pushing ▁the ▁limits ▁of ▁B AS IC A , ▁Microsoft ▁introduced ▁the ▁Quick B AS IC ▁compiler . ▁ ▁This ▁allowed ▁the ▁M ini TS FO ▁to ▁grow ▁beyond ▁the ▁memory ▁limits ▁of ▁B AS IC A ▁and ▁struct ured ▁programming ▁allowed ▁additional ▁complexity . ▁ ▁In ▁its ▁initial ▁design , ▁the ▁M ini TS FO ▁drew ▁all ▁screens ▁from ▁program ▁code . ▁ ▁It ▁wasn ' t ▁long ▁before ▁the ▁limitations ▁of ▁this