Write Number (implemented using a data stack)

Here's an alternative version of the routine to display numbers using exMARS Stream's sts opcode. The code executes in 8x+1 cycles, where x is the number of digits. This implementation uses a data stack.

printd  mov.a  *stack,    {stack
        div.a  #10,       }stack
        mod.a  #10,       *stack
        add.a  #48,       *stack
        add    #1,        pcount
        jmn.a  printd,    {stack
        add.a  #1,        stack
ploop   sts.a  }stack,    0
pcount  djn    ploop,     #0

Hello World in Redcode

Here's the shortest "Hello, World!" program I could implement, written using the sts opcode which is available in exMARS Streams.

write   sts.a  hello,     0
        sts.b  }write,    0
        djn    write,     #7

hello   dat    72,        101
        dat    108,       108
        dat    111,       44
        dat    32,        87
        dat    111,       114
        dat    108,       100
        dat    33,        10