Here is a table which lists the different screen options, along with an indication of the amount of memory a standard size screen will consume.
Colours Resolution Memory Notes 2 320x200 8k PAPER=0 PEN=1 no FLASH Cursor=1 2 640x200 16k as above 4 320x200 16k PAPER=1 PEN=2 FLASH=3 Cursor=3 4 640x200 32k as above 8 320x200 24k PAPER=1 PEN=2 FLASH=3 Cursor=3 8 640x200 48k as above 16 320x200 32k default setting 16 640x200 64k 32 320x200 40k 64 320x200 48k Extra Half Bright mode 4096 320x200 48k Hold And Modify mode
Controlling screens
SCREEN CLOSE
instruction: erase a screen
Screen Close number
Use the SCREEN CLOSE command to erase a screen and free the memory it was using for other programming needs. Simply specify the screen number to be deleted.
DEFAULT
instruction: re-set to the default screen
Default
The DEFAULT instruction closes all currently opened screens and restores the display back to the original default setting.
AUTO VIEW ON
AUTO VIEW OFF
instructions: toggle viewing mode on and off
Auto View On
Auto View Off
When SCREEN OPEN is used to create a new screen, the screen is usually displayed at once. This may be inconvenient during the initialisation stages of a program, in which case the AUTO VIEW OFF command can be used to disable this automatic display system. Screens can then be updated at a convenient point, using the VIEW instruction. To re-activate the automatic screen updating system, use the AUTO VIEW ON command.