123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789. SC Device Interface Description -- ------ ------------------------------------------------------------------ 00 12777A Priority Jumper Card BACI 12966A Buffered Asynchronous Communications Interface DA 12821A Disc Interface DPD 12557A Cartridge Disc/13210A Disc Drive Interface Data Channel DPC 12557A Cartridge Disc/13210A Disc Drive Interface Command Channel DQD 12565A Disc Interface Data Channel DQC 12565A Disc Interface Command Channel DRD 12606B Disc Memory/12610B Drum Memory Interface Data Channel DRC 12606B Disc Memory/12610B Drum Memory Interface Command Channel DS 13175D Disc Controller Interface IPLI 12875A Processor Interconnect Lower Data PCA IPLO 12875A Processor Interconnect Upper Data PCA LPS 12653A Line Printer Interface LPT 12845B Line Printer Interface MPX 12792C 8-Channel Asynchronous Multiplexer MSD 13181B/13183B Digital Magnetic Tape Unit Interface Data Channel MSC 13181B/13183B Digital Magnetic Tape Unit Interface Command Channel MTD 12559C 9-Track Magnetic Tape Unit Interface Data Channel MTC 12559C 9-Track Magnetic Tape Unit Interface Command Channel MUXL 12920A Asynchronous Multiplexer Interface Lower Data PCA MUX 12920A Asynchronous Multiplexer Interface Upper Data PCA MUXC 12920A Asynchronous Multiplexer Interface Control PCA PIF 12620A/12936A Privileged Interrupt Fence PTP 12597A-005 Tape Punch Interface PTR 12597A-002 Tape Reader Interface TBG 12539C Time Base Generator Interface TTY 12531C Buffered Teleprinter Interface Socket Device ROM Description ------ ------- ----------------------------------------- 3 DQC 12992A 7900/7901/2883 Disc Loader DS 12992B 7905/7906/7920/7925 Disc Loader MSC 12992D 7970 Magnetic Tape Loader DPC 12992F 2870/7900/7901 Disc Loader DA 12992H 7906H/7920H/7925H/9895 Disc Loader IPLI 12992K Processor Interconnect Loader PTR 12992K Paper Tape Loader