Which paper tape hole is bit 1?

[Bob Bradlee]

There are 4 parity states.

Mark parity = always punched
Space parity = never punched
Odd & even = punching based on other 7 bits of data
and None = all 8 bits are data.

Bob



On Sat, 19 Nov 2005 09:50:58 -0500, Barry Watzman wrote:

>I have a chart of paper tape hole patterns for all 128 characters, and it
>shows the LSB (bit zero, although the chart numbers them 1-8) as the edge
>hole on the 3-hole side, with the bits in order 0 to 7 (or 1 to 8).

>However, one question, this chart shows the high-order bit (parity bit)
>punched for every character, no exceptions.  Was that a standard convention
>in sending ascii files to paper tape?