2 May
2020
2 May
'20
7:02 a.m.
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.
Dwight
________________________________
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 :
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
FWIW, the ECMA standard is here https://www.polyomino.org.uk/computer/ECMA-10/
(found via Wikipedia)
--
Regards,
Torfinn Ingolfsen