Tuesday, 20 March 2018

Golden Age (6) : The Z Murders

The Z Murders by J. Jefferson Farjeon (published in 1932) is more a chase story than a detective story, though certainly has plenty of mystery. The main action in the story takes place in just a day or so on a frantic chase across the country but you are never quite sure if the protagonists are chasing the shadowy villain responsible for a number of murders or the ones being chased...

The villain is a sinister serial killer who isn't unveiled until late in the story. It is all starts fast paced, exciting... and quite frankly ridiculous. Before long the story starts to drag as start to forget exactly why the characters are racing around the country.

Well just imagine some classic chase music while you read it, it helps a lot. The ending is dramatic, the story is worth persevering with.

Sunday, 18 March 2018

Broken crockery

While digging a hole in the garden awhile ago I found a few pieces of broken crockery. Its funny how you always find these little bits of broken cups and plates if you dig deep enough. I wondered why this was so.

Did people in the past often drop cups and plates in their gardens and then leave the shards in the garden? I'm not the only person to ponder this, and their thought that maybe these shards were put in the bottom of pots and over time ended up in the soil seems feasible.

As well as these pieces of crockery I also found a large rusty metal bolt. Maybe it fell off a Spitfire... well as i live opposite the Castle Bromwich Jaguar factory which in the war made Spitfires perhaps that isn't quite as far fetched as it might seem. Probably more likely off an old lawn mower though!

Saturday, 17 March 2018

EVR Diesel Locomotive Weekend

Today I visited my favourite preserved railway the Ecclesbourne Valley Railway for the first time this year. The EVR was holding a Diesel Locomotive Weekend and I was keen to see one of the only two surviving Class 42 "Warship" locomotives which was one of the visitors.

Despite the snow and cold I had a good day. The snow photos do look quite dramatic though hopefully when I go to the EVR again in May it will be lovely and sunny and warm! You can see the photos here.

Friday, 16 March 2018

The history of Digital Equipment Corporation

Digital Equipment Corporation (or DEC) was at one time one of the largest computer companies in the world, even threatening to overtake IBM at one stage. However like a number of similar companies which made their fortunes from minicomputers they were unable to adapt to the rapid pace of change to personal computing in the late 1980s.

DEC was formed in 1957 by a couple of computer engineers, Ken Olsen and Harlan Anderson, with experience of working on computers at MIT Lincoln Laboratory. They wanted to build interactive computers but had trouble getting funding to start their business.

Due to the reluctance of investors to commit to funding a computer company (as the fast changing nature of the industry had made making a profit on the new technology rather elusive) the early DEC instead concentrated on building electronic and computing modules for laboratories with the aim of building full computers later on. The name that was chosen, Digital Equipment, also masked the original intention of the company.

With the company up and running the first computers came soon enough - though to keep investors from running away scared they did not call them computers, the PDP (Programmable Data Processor) family arrived with the PDP-1 in 1960. The PDP family continued to be developed throughout the following two decades with the 12-bit PDP-8 - the first successful minicomputer, and the 16-bit PDP-11.

The PDP-11 remained on sale until the 1990s with over six hundred thousand sold. Ironically one of the eventual agents of DEC's demise as we will see later, Unix, was first developed at Bell Labs on a PDP-7 in 1969.

DEC's next major family of computers was the 32-bit Virtual Address eXtension (VAX) family of high-end minicomputers which arrived in the late 1970s. The VAX family along with smart terminals like the VT52 and VT100 (DEC soon dominating the terminal market) helped DEC rise to become the second-largest computer company in the world in the mid 1980s.

It is probably worth mentioning more about DEC terminals. The first DEC terminals were the VT05 and VT52 which were successful enough but the VT100 in 1978 became the most recognised terminal name in the world and made DEC the leading vendor of terminals. Eventually over six million terminals would be sold by DEC.

Along with competitors like Prime Computer and Wang DEC began to falter in the late 1980s with the company's first quarterly loss following on a mere couple of years after the company had reached it's peak. Personal computers and Unix workstations were beginning to appear in ever greater numbers. Companies were quickly moving away from minicomputers in favour of the client server model, workstation performance (especially RISC based systems) was beginning to approach that of the "old iron" like DEC's VAX.

However as DEC was a "full spectrum" computer giant with a product range from microprocessors to software surely it could adapt?

DEC had dipped their toes in the water with the likes of the Rainbow 100 personal computer in 1982 but these efforts did not set the world on fire and DEC was far too reliant on the fast shrinking minicomputer market. The company was not set up to sell computers cheaply.

In 1994 DEC joined the RISC workstation club with it's 64-bit Alpha family of CPUs and workstations. Despite the industry leading speed of the Alpha microprocessor (which had Intel worried for a while) DEC's losses were beginning to mount. Restructures were followed by record losses as the 1990s progressed. Despite layoffs and sell-offs of parts of the business DEC could not be turned around and the company was bought by Compaq, one of the "upstart" PC manufacturers, in 1998. The purchase did not go well for Compaq though who ended up being bought themselves by HP in 2002.

Now DEC is long gone though it was survived by Alta Vista, the search engine it created in it's final few years. Alta Vista was eventually bought and absorbed by Yahoo in the early 2000s.
DEC PDP-8 at the National Museum of Computing