%import graphics
%zeropage basicsafe

main {
    sub start() {
        byte xx
        word yy

        uword addr = $3000
        cmp(xx, @($2000))
        cmp(@($2000), xx)
        cmp(yy, @($2000))
        cmp(@($2000), yy)
    }
    sub start3() {

        byte xx
        byte yy

        ; all comparisons with constant values are already optimized

        byte value = 100

        while xx==value {
            yy++
        }

        while xx!=value {
            yy++
        }

        while xx>value {
            yy++
        }

        do {
            yy++
        } until xx==value

        do {
            yy++
        } until xx!=value

        do {
            yy++
        } until xx>value

        if xx==value
            yy++

        if xx!=value
            yy++

        if xx>value
            yy++
    }


    sub start2() {

        graphics.enable_bitmap_mode()

        uword xx
        ubyte yy

        graphics.line(150,50,150,50)

        for yy in 0 to 199-60 step 16 {

            for xx in 0 to 319-50 step 16 {
                graphics.line(30+xx, 10+yy, 50+xx, 30+yy)
                graphics.line(49+xx, 30+yy, 10+xx, 30+yy)
                graphics.line(11+xx, 29+yy, 29+xx, 11+yy)

                ; triangle 2, counter-clockwise
                graphics.line(30+xx, 40+yy, 10+xx, 60+yy)
                graphics.line(11+xx, 60+yy, 50+xx, 60+yy)
                graphics.line(49+xx, 59+yy, 31+xx,41+yy)
            }
        }

        repeat {
        }
    }
}