On Fri, May 1, 2020 at 6:20 PM Hugh Pyle <hp...@cabezal.com> wrote: > > Tony, maybe your collection can help me answer a puzzle: which side is > "top"? By my reading, for 8-level tape, > - ANSI and other US standards have three data bits / index / then five data > bits > - ECMA has five/index/three... :) > https://twitter.com/33asr/status/1138758004747177984
As far as I know the 5-hole side is always the most significant 5 bits, the 3 hole side the least significant 3 bits. In other words the holes go : 76543S210 Where S is the sprocket hole and a digit is the bit number (bit 0 is the least significant bit). As to which way use the tape, with the tape feeding towards you, the sprocket hole is normally offset towards the right, that is the bits would read with the MSB on the left. I am not sure if that is universal though -tony
