AMOSi:Set Bob

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an example can be found on AMOSPro_Examples:Examples/H-2/Help_27.AMOS

SETs the mode for drawing a Blitter OBject on screen.

Set Bob number,background,screenplanes,mask

number is the number of the bob you want to affect.

background can take one of three values:

0 replaces the background whenever the bob is moved. (Default)

Greater than 0 replaces the area with a block of colour background-1

Less than 0 doesn't redraw the background at all.

screenplanes is a bit-pattern which specifies which planes are to be used by the bob. A value of 1 draws the bob in plane, a zero doesn't.

mask selects the blitter mode using a set of minterms.