%import textio

; NOTE: meant to test to virtual machine output target (use -target vitual)

main {
    sub start() {
        txt.clear_screen()
        txt.print("Welcome to a prog8 pixel shader :-)\n")

        uword ww = 0
        ubyte bc
        uword wc

        for bc in "irmen" {
            ; +5 -> 17
            txt.chrout(bc)
            ww++
        }
        txt.print_uw(ww)
        txt.nl()

        for wc in [1000,1111,1222] {
            txt.print_uw(wc)
            txt.spc()
            ww++    ; +3 -> 20
        }
        txt.print_uw(ww)
        txt.nl()

        for bc in 10 to 20 step 3 {
            ; 10,13,16,19 -> 4
            ww++
        }
        txt.print_uw(ww)
        txt.nl()
        for bc in 30 to 10 step -4 {
            ; 30,26,22,18,14,10,6,2 -> +8 -> 12
            ww++
        }
        txt.print_uw(ww)
        txt.nl()


        sys.exit(99)


        syscall1(8, 0)      ; enable lo res creen
        ubyte shifter

        shifter >>= 1

        repeat {
            uword xx
            uword yy = 0
            repeat 240 {
                xx = 0
                repeat 320 {
                    syscall3(10, xx, yy, xx*yy + shifter)   ; plot pixel
                    xx++
                }
                yy++
            }
            shifter+=4

            txt.print_ub(shifter)
            txt.nl()
        }
    }
}