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The Honeywell 6000 series computers were rebadged versions of General Electric's 600-series mainframes manufactured by Honeywell International, Inc. from 1970 to 1989. Honeywell acquired the line when it purchased GE's computer division in 1970 and continued to develop them under a variety of names for many years. The high-end model was the 6080, with performance approximately 1 MIPS. Smaller models were the 6070, 6060, 6050, 6040, and 6030. In 1973 a low-end 6025 was introduced. The even-numbered models included an ''Enhanced Instruction Set'' feature (EIS), which added decimal arithmetic and storage-to-storage operations to the original word-oriented architecture. In 1973 Honeywell introduced the 6180, a 6000-series machine with addressing modifications to support the Multics operating system. In 1975 the 6000-series systems were renamed as ''Level 66'', which were slightly faster (to 1.2 MIPS) and offered larger memories. In 1977 the line was again renamed 66/DPS, and in 1979 to DPS-8, again with a small performance improvement to 1.7 MIPS. The Multics model was the DPS-8/M. In 1989 Honeywell sold its computer division to the French company Groupe Bull who continued to market compatible machines. ==Hardware== 6000-series systems were said to be "memory oriented"— a ''system controller'' in each memory module had eight ports for communication with other system components, with an interrupt cell for each port. Memory modules contained 128 K words of 1.2 μs 36-bit words; a system could support one or two memory modules for a maximum of 256 K words (1 MB of 9-bit bytes). Each module provided two-way interleaved memory. The 6000 supported multiple processors. Each processor had four ports for connection to memory or I/O controllers. Memory protection and relocation was accomplished using a base and bounds register, the ''Base Address Register (BAR)''. Devices called ''Input/Output Multiplexers (IOMs)'' served as intelligent I/O controllers for communication with most peripherals. The IOM was passed the contents of the BAR for each I/O request, allowing it to use virtual rather than physical addresses. The IOM supported two different types of peripheral channels: ''Common Peripheral Channels'' could handle data transfer rates up to 650,000 cps; ''Peripheral Subsystem Interface Channels'' allowed transfers up to 1.3 million cps. A variety of communications controllers could also be used with the system. The older DATANET-30 and the DATANET 305— intended for smaller systems with up to twelve terminals attached to an IOM. The DATANET 355 processor attached directly to the system controller in a memory module and was capable of supporting up to 200 terminals. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Honeywell 6000 series」の詳細全文を読む スポンサード リンク
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