In each BASIC program, there is a for next statement that reads the binary data. If it is a 1 then a sis call gives control to an assembly routine (Pixel Picker) to place a dot on the screen. If it’s a 0 it skips by. The vic 20, with its 1MHz processor, can execute Pixel Picker in less than
In each BASIC program, there is a for next statement that reads the binary data. If it is a 1 then a sis call gives control to an assembly routine (Pixel Picker) to place a dot on the screen. If it’s a 0 it skips by. The vic 20, with its 1MHz processor, can execute Pixel Picker in less than