My first pc was an Acorn Electron (little brother to the famous BBC pc, which I bought later on) in the 1980s
Started with 32k RAM I think and a tape deck to store programmes/programs, all in BASIC of course, although I ran out of memory when coding myself a word processor so I ended up doing some of it in 6502 assembler – fun times…

If you used the higher res graphics and wrote programs that were too big, some of the programs would overwrite the graphics RAM and you’d see pixels appearing on the bottom right of your screen. That was ok until you caused some graphics to write in the same patch of screen and then – BAM! Hung…
I used my parents’ TV until I got myself a green-screen CRT