A VAX-11/780. The VAX-11 is a discontinued family of 32-bit superminicomputers, running the Virtual Address eXtension (VAX) instruction set architecture (ISA), developed and manufactured by Digital Equipment Corporation (DEC). Development began in 1976.

The VAX-11/780, introduced October 25, 1977, was the first of a range of popular and influential computers implementing the VAX ISA. The VAX family was a huge success for DEC, with the last members arriving in the early 1990s. The VAX was succeeded by the DEC Alpha, which included several features from VAX machines to make porting from the VAX ...

The VAX-11/780 was the first member to ship of the VAX family of larger computers. The VAX series was conceived as the successor to the successful PDP-11 series of minicomputers ; in order to make the VAX seem more PDP-11 friendly, they retained the -11 moniker for the first VAXen, and provided the ability to execute PDP-11 object code - hence ...

With VAX, DEC extended its PDP-11 minicomputer architecture from 16 to 32 bits. The first model in the VAX “superminicomputer” line was the VAX-11/780. The line rivaled “much more expensive mainframe computers in performance,” according to the online Computer History Museum. The VAX line also featured “the ability to address over 4GB ...

characterize VAX-11/780 processor performance under real timesharing workloads [13]. Our main goal is to attribute the time spent in instruction execution to the various activities a VAX instruction may engage in, such as operand fetching, waiting for …

The VAX line of 32-bit “super-minicomputers” rivaled much more expensive mainframe computers. Its success made DEC the second-largest company in the industry. VAX, a “complex instruction set computer,” was widely cloned in Eastern Europe.</p>

In particular, while the VAX-111780, which was introduced in 1978, was probably the preeminent timesharing machine on university campuses at that time, very little was known about how it worked or exactly what its performance was.

Extremely popular in universities as well as government and industrial research settings, the DEC VAX minicomputer was a powerful timesharing system that encouraged the growth of computer science as a discipline.

1998年8月1日 · This paper reports the results of a study of VAX-11/780 processor performance using a novel hardware monitoring technique. A micro-PC histogram monitor was built for these measurements. It keeps a count of the number of microcode cycles executed at each ...

2017年10月15日 · So, in October 1977 DEC launched the first of their VAX range, the VAX-11/780. Somewhat backward compatible with the PDP-11, the VAX introduced a 32-bit architecture and virtual memory addressing. The VAX was designed to be easy to program, and along with it was launched the new VAX-11/VMS operating system …