DIY Paper Tape Punch - Mechanism diagram?
dkelvey at hotmail.com
Sat May 2 09:02:06 CDT 2020
If you go with punch pins, standard drill rod is not hard to get. It often comes in materials that can be easily heat hardened.
From: cctalk <cctalk-bounces at classiccmp.org> on behalf of Torfinn Ingolfsen via cctalk <cctalk at classiccmp.org>
Sent: Saturday, May 2, 2020 4:14 AM
To: General Discussion: On-Topic and Off-Topic Posts <cctalk at classiccmp.org>
Subject: Re: DIY Paper Tape Punch - Mechanism diagram?
On Fri, May 1, 2020 at 7:32 PM Tony Duell via cctalk
<cctalk at classiccmp.org> wrote:
> 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 :
> 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
FWIW, the ECMA standard is here https://www.polyomino.org.uk/computer/ECMA-10/
(found via Wikipedia)
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