While I was writing a program on an Apple IIe, I set up access the graphics page using softswitches, and then tried to draw on it, but the system crashed so hard I had to do a Control - Open Apple - Reset reboot to get out of it. What happened?
Boot DOS 3.3
10 POKE -16304,0: POKE -16301,0: POKE -16297,0: POKE -16300,0
20 HCOLOR = 3
30 HPLOT 0,0 TO 279,159
RUN
** CRASH to monitor **
Control-C to return to BASIC
Each time RETURN is pressed, it says ?SYNTAX ERROR
Press Control-Reset
Doesn't help, still says ?SYNTAX ERROR when RETURN is pressed