MicroVAX

The MicroVAX I, code-named Seahorse,{{cite web ==MicroVAX II==

The MicroVAX II, code-named Mayflower, is a mid-range MicroVAX introduced in May 1985 and shipped shortly thereafter. Mira Mira refers to a fault-tolerant configuration of the MicroVAX II developed by DEC's European Centre for Special Systems located in Annecy in France. The system consists of two MicroVAX 78032 microprocessors, an active and standby microprocessor in a single box, connected by Ethernet and controlled by a software switch. When a fault was detected in the active microprocessor, the workload switches over to the standby microprocessor. Industrial VAX 630 A MicroVAX II in BA213 enclosure. MicroVAX III BA23- or BA123-enclosure MicroVAX upgraded with KA650 CPU module containing a CVAX chip set. MicroVAX III+ BA23- or BA123-enclosure MicroVAX upgraded with KA655 CPU module. VAX 4 BA23- or BA123-enclosure MicroVAX upgraded with KA660 CPU module. == MicroVAX 2000 ==

The MicroVAX 2000, code-named TeamMate, is a low-cost MicroVAX introduced on 10 February 1987. In January 1987, the MicroVAX 2000 was the first VAX system targeted at both universities and VAX programmers who wanted to work from remote locations. The MicroVAX 2000 uses the same microprocessor and floating-point coprocessor as the MicroVAX II, but was feature reduced in order to lower the cost. Limitations are a reduced maximum memory capacity, 14 MB versus 16 MB in MicroVAX II systems, and the lack of Q-Bus or any expansion bus. The system can have a Shugart-based harddrive with ST412 interface and MFM encoding and has a built in 5.25-inch floppy drive (named RX33 in DEC jargon) for software distribution and backup. Supported operating systems are VMS and ULTRIX. It is in a desktop form factor. == MicroVAX 3100 Series ==

The MicroVAX 3100 Series was introduced in 1987. These systems are all packaged in desktop enclosures. ;MicroVAX 3100 Model 10 : Teammate II : KA41-A, CVAX, 11.11 MHz (90 ns) ;MicroVAX 3100 Model 10e : Teammate II : KA41-D, CVAX+, 16.67 MHz (60 ns) : 32 MB of memory maximum. ;MicroVAX 3100 Model 20 : Teammate II : KA41-A, CVAX, 11.11 MHz (90 ns) : A Model 10 in larger enclosure. ;MicroVAX 3100 Model 20e : Teammate II : KA41-D, CVAX+, 16.67 MHz (60 ns) : A Model 10e in larger enclosure. ;MicroVAX 3100 Model 30 : Waverley/S : Entry-level model, developed in Ayr, Scotland : Introduced: 12 October 1993 : KA45, SOC, 25 MHz (40 ns) : 32 MB of memory maximum. ;MicroVAX 3100 Model 40 : Waverley/S : Entry-level model, developed in Ayr, Scotland : KA55, NVAX, 62.5 MHz (16 ns), 128 KB external cache : 16 to 128 MB of memory. ;MicroVAX 3100 Model 88 : Waverley/M+ : Introduced: 8 October 1996 : Last order date: 30 September 2000 : Last ship date: 31 December 2000 : Processor: KA51, NVAX, 83.34 MHz (12 ns), 512 KB external cache. ;MicroVAX 3100 Model 96 : Cheetah++ : KA56, NVAX, 100 MHz (10 ns) : 16 to 128 MB of memory. ;MicroVAX 3100 Model 98 : Cheetah++ : Introduced: 8 October 1996 == Mayfair ==

MicroVAX 3500 and MicroVAX 3600 The MicroVAX 3500 and MicroVAX 3600, code-named Mayfair, were introduced in September 1987 and were meant to be the higher end complement of the MicroVAX family. These new machines feature more than three times the performance of the MicroVAX II and support 32 MB of ECC main memory, twice that of the MicroVAX II. The performance improvements over the MicroVAX II results from the increased clock rate of the CVAX chip set, which operates at 11.11 MHz (90 ns cycle time) along with a two-level, write-through caching architecture. It uses the KA650 CPU module. MicroVAX 3300 and MicroVAX 3400 The MicroVAX 3300 and MicroVAX 3400, code-named Mayfair II, are entry-level to mid-range server computers introduced on 19 October 1988 intended to compete with the IBM AS/400. They used the KA640 CPU module. MicroVAX 3800 and MicroVAX 3900 The MicroVAX 3800 and MicroVAX 3900, code-named Mayfair III, were introduced in April 1989. They are high-end models in the MicroVAX family, replacing the MicroVAX 3500 and MicroVAX 3600, and intended to compete with the IBM AS/400. At introduction, the starting price of the MicroVAX 3800 was US$81,000 and that of the MicroVAX 3900 was US$120,200. A variant of the MicroVAX 3800, the rtVAX 3800, was intended for real-time computing (RTC) applications such as computer-aided manufacturing (CAM). These systems use the KA655 CPU module, which contains a 16.67 MHz (60 ns cycle time) CVAX chip set. They support up to 64 MB of memory. == References ==