My first computer! If you can call it that. Hex keypad input, 9 seven segment led output display. Didn't do anything when switched on until you entered a program, one byte at a time. I was used to the idea of machine level instructions from my day job, but not being able to run a program or even load one from a cassette tape (3 characters per second max.) until you'd entered a loader program, was just too much like hard work. This soon got relegated to the loft.
Wikipedia has some information and links to enthusiasts.
Sunday, 14 October 2012 15:13