prog8/examples/test.p8

    %import c64lib
    %import c64utils
    %import c64flt

    ~ main {
        sub start() {
            ; set text color and activate lowercase charset
            c64.COLOR = 13
            c64.VMCSB |= 2

            ; use optimized routine to write text
            c64scr.print("Hello!\n")

            ; use iteration to write text
            str question = "How are you?\n"
            for ubyte char in question
                c64.CHROUT(char)

            ; use indexed loop to write characters
            str bye = "Goodbye!\n"
            for ubyte c in 0 to len(bye)
                c64.CHROUT(bye[c])


            float clock_seconds = ((mkword(c64.TIME_LO, c64.TIME_MID) as float)
                                    + (c64.TIME_HI as float)*65536.0)
                                     / 60
            float hours = floor(clock_seconds / 3600)
            clock_seconds -= hours*3600
            float minutes = floor(clock_seconds / 60)
            clock_seconds = floor(clock_seconds - minutes * 60.0)

            c64scr.print("system time in ti$ is ")
            c64flt.print_f(hours)
            c64.CHROUT(':')
            c64flt.print_f(minutes)
            c64.CHROUT(':')
            c64flt.print_f(clock_seconds)
            c64.CHROUT('\n')
        }
    }