1983-02-22 /BB-L014E-BM/01/autopatch/apl2b2.pdf 1987-12-03 /bb-l014q-bm_tops20_v6_1_atpch17/01/autopatch/apl2b2.pdf 1988-03-18 /bb-l014r-bm_tops20_v6_1_atpch_18/01/autopatch/apl2b2.pdf 1988-05-09 /bb-y390n-bm_tops20_v41_atpch_19/01/autopatch/apl2b2.pdf