3 ms·
Funny. I still remember it $FDED on the Apple // series. But printing text out like that was really slow. For fast text printing you had to write to memory l
by scarface_74 2y ago
Funny. I still remember it $FDED on the Apple // series. But printing text out like that was really slow. For fast text printing you had to write to memory locations between $400-$7FF and deal with the non continuous memory block -> screen location mapping.
It was even more of a pain with 80 columns when half of the text was in the main memory and the other half was the bank switched memory.
- kstrauser 2y agoOuch. That sounds painful. Yeah, I usually ended up writing to screen RAM at $400. It was convenient to let the kernal manage cursor position and all that, though.
- scarface_74 2y agoYeah, in 40 column mode, each row was separate by 320 bytes. In 80 column mode, each even character on a line was in main memory and each odd column was in the second 64K block in extended memory.
- kstrauser 2y agoI’m certain there was a good reason for that. Woz was an engineer’s engineer. But wow, I can’t imagine what it would’ve been.