BBC Basic: Cannot plot rectangle on screen
问题 I recently got my hands on a BBC Micro (model B), and been playing around with it as a hobby project. I'm having some trouble with the graphics commands, and was wondering if anyone could point me in the right direction... I have written the following test program to draw a rectangle on the screen: 10 CLS 20 MODE 5 30 MOVE 0,0 40 PLOT 97,100,100 When I run this, the program completes but no rectangle is drawn (that I can see). I'm using a coaxial cable to connect to a CRT TV, but I don't