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}
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}
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UBYTE zx_fifo_isfull(void)
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UBYTE zx_fifo_isfull(void)
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{
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{
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        //always one byte unused, to distinguish between totally full fifo and empty fifo
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        //always one byte unused, to distinguish between totally full fifo and empty fifo
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        return( (zx_fifo_in_ptr+1)==zx_fifo_out_ptr );
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        return( ((UBYTE)(zx_fifo_in_ptr+1))==zx_fifo_out_ptr );
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}
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}
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UBYTE zx_fifo_isempty(void)
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UBYTE zx_fifo_isempty(void)
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{
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{
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        return (zx_fifo_in_ptr==zx_fifo_out_ptr);
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        return (zx_fifo_in_ptr==zx_fifo_out_ptr);