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@program: .data 0, @IN, 3, 0, 8, 6, @OUT, 0, -48, 0, 0, 0
If a command is guaranteed to output a positive number to @OUT, the jump address can be used to store a number. Thus, bytes read can be reduced by one. And writing the bytes by hand allows negative numbers and characters so you don't have to subtract from 256 every time.
If I use subleq, I would have to use the value range 0-255, and so instead, I write the bytes in the .data directive to use the - sign so it’s slightly easier to understand. By writing the bytes ‘by hand’ in the .data directive, I also have to handle the jumps, which are normally handled by the assembler.
Example:
subleq @OUT 2 -‘0’ isn’t allowed, but you can subtract from 256 subleq @OUT 2 208 is what it will be, but it’s less expressive So, @prog: .data @OUT, 2, -‘0’ is the best choice in my opinion
