Click here or click onto the photo for a full size version of this picture. The DECstation 5000/200 was the first machine of the DECstation series that had a bus for expansion cards. It is the DEC-proprietary TurboChannel bus that was used throughout the whole line of DECstations and the first generation of Alpha-based DEC workstations (namely the DEC 3000 line). Remarkable is the amount of memory you can stuff into a desktop machine that was built around 1990. The machine has 15(!) memory slots, each of which can hold a module of either 8 or 32 Mbytes. The memory area however consumes so much space in the machine that there is no space for internal drives, so a 5000/200 was almost always found together with one or more "Storage Expansion" boxes. In this picture, it is sitting between the machine and the monitor. A nice detail is the ECC checking of the RAM. Each memory word of 32 bits is accompanied with enough check bits to correct single-bit errors and to detect any two-bit error.

Processor: Mips R3000, 25 MHz Coprocessor: Mips R3010, 25 MHz Cache: 64 Kbytes Code, 64 Kbytes Data Integer Performance: 25 VAX-Mips, roughly like a 486DX2/66 Memory: 48 Mbytes (options range from 8M to 480M) Bus: 3 TurboChannel slots @ 25 MHz Interfaces (onboard): Mouse, Keyboard 2 x Serial SCSI (narrow) 10 Mbps Ethernet (BNC only) Add-on cards: PMAGB-A Color Video (1024x864@256 colors) PMAZ-AA SCSI Host adapter (narrow) DEFZA optical FDDI interface Operating System(s): Ultrix 4.5 NetBSD 1.3.2

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