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IBM RT : ウィキペディア英語版
IBM 6150 RT


The IBM RT (or IBM 6150 series) was a computer workstation sold by IBM and built around IBM's ROMP processor, a spin-off of the IBM 801 pioneered at IBM Research. The system was introduced in 1986 as the RT PC (RISC Technology Personal Computer) and ran AIX 1.x and 2.x, the Academic Operating System (AOS), or the Pick operating system. It was commonly, but incorrectly, known as the PC RT, and IBM later simplified the name. It didn't enjoy much success, and all models were discontinued by May 1991. However, the system spurred further development, as it was followed by IBM's RS/6000 and the corresponding POWER processor line, which was the basis for the PowerPC.
==Hardware==

Three models were produced, the 6150, 6151, and 6152. The basic types of machines were the tower model (6150), and the desktop model (6151). All these models featured a special board slot for the processor card, as well as machine specific RAM cards. Each machine had one processor slot, one co-processor slot, and two RAM slots.
There were three versions of the 6150/6151 processor card: the standard 032 processor card had a 5.9 MHz clock rate, 1 MB standard memory (expandable via 1 MB, 2 MB or 4 MB memory boards) and optional floating point accelerator.
The Advanced processor card had a 10 MHz clock and either 4 MB memory on the processor card, or external 4 MB ECC memory cards, and featured a built-in 20 MHz Motorola 68881 floating-point processor. The Enhanced Advanced processor card had a cycle time of 80ns, 16 MB on-board memory, while an enhanced advanced floating point accelerator was standard.
I/O was provided by eight ISA bus slots. A typically configured RT came with 4 MB of memory, maxing out at 16 MB, and with a 40 or 70 MB hard drive, upgradable to 300 MB or more with external SCSI cabinets. Also standard were mouse and either a 720×512 or 1024×768 pixel-addressable display and either a 4 MB/s Token Ring network adapter, or a 10Base2 Ethernet adapter.
The IBM 6152 was a hybrid IBM PS/2 Model 60 with a special MicroChannel board version of the 032 processor, dubbed a "crossbow" board. It ran only the AOS operating system, downloaded from another IBM 6150 or 6151 also running AOS, via a LAN TCP/IP interface.

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「IBM 6150 RT」の詳細全文を読む



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