What was your first computer?

[halfeye]

I never had one myself, but a friend did, and I was quite interested in the internals of computers back then. *shrug* The C64 had such a weird memory layout that it fascinated me--it wasn't like the 16K and 48K Spectrum, which had 16K ROM, then the screen, then some system variables and finally the usable memory, nice and easy to grok.

The Newbrain was fun in that regard, Basic was above the screen, but the screen size was variable (including from within running Basic programs), which meant everything moved around a lot of the time.