26 Mar
2021
26 Mar
'21
12:40 p.m.
I can punch arbitrary 8 bit data to 8 level tape. Is the MSB always 0? That
is very easy to do, just make sure the binary looks right and as long as
the pitch between bits is the same as 8 level tape you will end up with
holes in the places you would expect.
If you want 7 level tape punched with some custom width between bits, I.E.
not compliant with EIA RS-227, I can not help you :)
-Eric
On Fri, Mar 26, 2021, 2:31 PM Guy Fedorkow <fedorkow at mit.edu> wrote:
wow, what format?
The codes I'm punching should line up with a long-dead machine,
Whirlwind from MIT, so I think you'd consider them to be 7-track binary,
i.e., same size as an 8-track teletype tape with one track blank, but no
recognizable coding like ASCII.
Can you suggest what format you'd want?
Thanks!
/guy
ps, You can see some of the work behind this at
https://www.historia-mollimercium.com/whirlwind/
On 3/26/2021 3:16 PM, Eric Moore wrote:
I can easily punch and verify some tapes for you.
-Eric
On Fri, Mar 26, 2021 at 2:15 PM Guy Fedorkow via cctalk <
cctalk at classiccmp.org> wrote:
Is there someone in North America that might be
willing and able to help
out a small historical display project by punching a few short paper
tapes?
I'm glad to try to accommodate whatever coding requirements are easiest.
Thanks!
/guy fedorkow
fedorkow at mit.edu