The following is a partial listing of available system options for the DECrepeater 90FS 11/84 - system. These options and all ordering details are completely described in the Options and Disks and Tapes chapters. DECrepeater 90FS -JB/JD 1-Mbyte PMI ECC MOS memory (11/84) MSV11-JC/JE 2-Mbyte PMI ECC MOS memory (11/84) DHU11-M 16 line asynchronous DMA multiplexer DUP11-M Single-line synchronous interface DECrepeater 90FS DMP11-M Single-line synchronous interface DECrepeater 90FS KMS1P-M Single-line synchronous communications front-end processor KMS11-BD/BE 8-line synchronous communications front-end processor DECrepeater 90FS -M High-performance Ethernet communications controller H7231-E 11X84 battery backup option DECrepeater 90FS -F 11/84 battery backup option DR11-C General purpose parallel interface DR11-W DR11-WC General purpose DMA parallel interface DECrepeater 90FS - DR11-WD I/O distribution panel DRS11-A DR11-WC without interface module DECrepeater 90FS-B 48-channel output module DRS11-MP 48-channel output module with open collector drivers DRU11-CC Optically isolated dc drivers with open collectors DECrepeater 90FS -CD Alternate buffer interface with TTL drivers