windows program to read papertape from reader through serial port

dwight dkelvey at
Tue Jul 21 09:51:25 CDT 2020

Text tapes for my Nicolet always set bit 8. The binary is mixed. Some text the extra bit is used for parity checking. It varies It is good to read everything. you can always post process whatever you get. You can't process what you don't read.

From: cctalk <cctalk-bounces at> on behalf of Bill Degnan via cctalk <cctalk at>
Sent: Tuesday, July 21, 2020 7:36 AM
To: Mike Douglas <deramp5113 at>; General Discussion: On-Topic and Off-Topic Posts <cctalk at>
Subject: Re: windows program to read papertape from reader through serial port

As I think about it, I guess capturing an unknown ASCII 1" tape using 8-bit
(not 7 bit) makes the most sense as this will ensure I get everything.
WHen I compare and contrast I see the 8bit grabs the same data as the 7bit
capture, plus the extra 1 bit tacked on.

I am learning as I go, that's the fun of this hobby.  Learn something new
all of the time.

I am working to extract Honeywell DDP-516 lunder landing data tape
(supposedly).....any Honeywell experts out there want a copy?  SO far I
have done what appears to be the absolute loader (labeled "ABCT") and a
utility called 8X-MEDIC.

My hope it to be able to feed this tape into simH, and learn more about the
Honeywells of the time.  I have a DDP516 front panel and some core memory,
which peaks my interest.


On Tue, Jul 21, 2020 at 7:51 AM Bill Degnan <billdegnan at> wrote:

> What I want to do is take an unknown nm own tape and read it correctly.
> Bill
> On Tue, Jul 21, 2020, 3:14 AM Mike Douglas via cctalk <
> cctalk at> wrote:
>> I’ve used Teraterm to receive and save binary paper tapes and ASCII paper
>> tapes to files using the log function without any problem. When you say
>> receive “into an ASCII file,” what is the ASCII requirement you’re trying
>> to satisfy? What is on the tape - text or binary data?
>> Mike

More information about the cctalk mailing list