26 Mar
2021
26 Mar
'21
8:09 p.m.
Al said
the best picture i have at hand of what a ww tape
looks like is on the right of
http://bitsavers.org/bits/MIT/whirlwind/X4222.2008_Whirlwind_ptp/pictures/s…
you can see it is narrower by one punch than a normal 8-channel tape
OK that really seems to be 7/8" wide 7-level, even though the 1965 ECMA doc says
7-level is 1" ...??
So I just added a --whirlwind flag to ptap2dxf (and pushed it up) to make physical tape
that looks
like that photo. It doesn't yet do any protocol mapping or whatnot as I don't
quite get the gist of
the Whirlwind_Paper_Tape_Format.pdf
C:\path\to>ptap2dxf --whirlwind --text="012ABC" --output=WW.DXF
+--------+
| OO. |
| OO. O|
| OO. O |
|O . O|
|O . O |
|O . OO|
+--------+
Joiner 0000: data byte 00000000 absolute position 00000006
C:\path\to>head -5 WW.DXF
0
SECTION
2
HEADER
9
. . .
(And cut that tape DXF on a CNC stencil machine. I don't have my stencil cutter set up
at this
moment so I just printed it on paper and measured to confirm 7/8" wide, 7 data
holes)
But I suppose it's all a moot point if they don't have the original Whirlwind
paper tape reader
device to run it through :(
Steve
