My old computers
Here I expect to present some info about my early experience with computers,
UNIVAC 1107, PDP8, ABC80 and others.
1965/66 I wrote my first computer programs for UNIVAC 1107, in the
high level programming language ALGOL.
1967/68 I learnt programming in machine code and assembly on a
1979 A colleague, Gunnar Slungaard, and I used computer corrected multiple choice exams at Oslo
Engineering College, with the students preparing direct input to
the mainframe computer by filling in pencil-marked computer
1979 I acquired my first personal computer, a Z80-based Swedish
I only got the keyboard and computer box and had to build my own power supplies,
display interface (using a small TV as display) and interface circuits to use an
audio cassette recorder for mass storage. I also installed decoding and
DRAMs to double the computers RAM from 16 to 32 kB! Later I added two 70 kB
floppydisc stations as program storage. A simple program editor was modified to
act as text editor. An electric typewriter with a typewheel was modified to work
as a printer. It printed out very pretty letters and compendiums.
This computer was used very extensively until I got access to the first IBM XT's