RvmASM Syntax

RVM is my custom RISC ISA for virtual machines. RvmASM is the language you write programs for them in. Here is an example:

>CFG bit-width #8
>CFG addr-width #16

@BLCK mmio $3000 {
    @VAR serial_port $30
    @VAR gpu_update_register $301555
    @VAR PS2 $3F8
}

@BLCK data $5000 {
    @VAR msg "Hello World"
}

@BLCK functions $6000 {
    @FUNC print with @ARGS 1 {
        reg:3 <- $0
        while reg:2 != 0 {
            reg:2 <- *(@ARG:0 + reg:3)
            reg:2 -> mmio.serial_port
            reg:3 <- reg:3 + $1
        }
        return
    }
}

@BLCK start $4000 {
    @CALL functions.print with &data.msg
}