Retroist Access Monday (RAM) – Sinclair ZX80

Released 1980, the ZX80ne was designed by Jim Westwood around a Z80 central processing unit with a clock speed of 3.25 MHz, and was equipped with 1 KB of static RAM and 4 KB of read-only memory containing the Sinclair BASIC programming language, editor, and operating system. BASIC commands were not entered by typing them out but were instead selected somewhat similarly to a scientific calculator – each key had a few different functions selected by both context and modes as well as with the shift key.

Display was over an RF connection to a household television, and simple offline program storage was possible using a cassette recorder. Other than the built-in cassette and video ports, the only provided means of expansion was a slot opening at the rear of the case, which exposed an expansion bus edge connector on the motherboard. The same slot bus was continued on the ZX81, which encouraged a small cottage industry of expansion devices, including memory (Sinclair produced RAM expansion packs for the ZX80: the original ZX80 RAM Pack held either 1, 2 or 3 KB of static RAM; a later model held 16 KB, using dynamic RAM chips (DRAM)), printers, and even floppy drives.

sinclair zx80

Retroist Access Monday (RAM) – R.I.P Sony 3.5 inch Floppy

According to Sony, they introduced the 3.5 inch floppy disk size to the world in 1981, and began sales within Japan in 1983. Sony had shipped approximately 47 million disks within the country at its peak around the year 2000, but that number had fallen to around 8.5 million by 2009.

Sony announced on April 23rd that they will be discontinuing sales of the classic 3.5 inch floppy disk in Japan in 2011. The news marks a major end to a nearly three decade history of the disk type that the company helped to pioneer.

sony floppy

Sony 3.5 inch floppy 1981-2011

Retroist Access Monday (RAM) – Dr. Ed Roberts, ‘Father of the PC’, Dies at 68

ed roberts

Dr. Edward Roberts was the intelligent person behind the creation of MITS Altair, an inexpensive microcomputer which had the ability to handle all tasks. Many linked him as the creator of personal computers. The special connection between, Dr. Robert and Bill Gates, was quiet personal and dated long time back. When Dr. Robert created the first microcomputer, Gates a student at Harvard, wrote the very first software program for the device. This is where, Gates first started to later launch his firm Microsoft.

Please learn more about him. Ed Roberts [@] wikipedia