Unicode Document Register# L2/25-142

Feedback submitted through Unicode Contact form:

Date:  Sun, 27 Apr 2025 19:09:09 -0400

Author: Michael Walden

Subject: IBM PC character set mapping table



Hello UTC,

I have created a mapping table to map the legacy IBM PC character set to Unicode.

I would like to submit my IBMPCCP437.TXT mapping table to the following directory
on the Unicode.org web site:

https://www.Unicode.org/Public/MAPPINGS/VENDORS/MISC/

My IBMPCCP437.TXT mapping table can be downloaded from this URL:

https://MW.Rat.bz/cp437map/IBMPCCP437.TXT

I propose that my mapping table should obsolete the following two mapping tables
that, when used together, cover the full IBM PC character set but with errors
in the included mappings.

https://www.Unicode.org/Public/MAPPINGS/VENDORS/MISC/IBMGRAPH.TXT
https://www.Unicode.org/Public/MAPPINGS/VENDORS/MICSFT/PC/CP437.TXT

My mapping table contains all characters in one and has, I believe, no errors.

For more details see the comments in my IBMPCCP437.TXT file.

The following web page briefly says a little more about my mapping table.

IBM PC Code Page 437 to Unicode Mapping Table
https://MW.Rat.bz/cp437map

Lastly, the following four web pages relate to my IBMPCCP437.TXT mapping table
and discuss the reasons I had for choosing the correct characters and also
demonstrate the mapping against the IBM PC MDA ROM font character table.

Dr. David J. Bradley on IBM PC's Character Set and More
https://MW.Rat.bz/djb

The IBM PC Character Set Confusion Clarified
https://MW.Rat.bz/confusion

IBM PC Technical Reference Character Set (00-FF) Quick Reference
https://MW.Rat.bz/ibmpctr

IBM PC MDA ROM Font Character Table
https://MW.Rat.bz/mdarom
So, the question is is this the correct email address to send such a request
to? If not, where then?

Lastly, feel free to pass on my five links from above to anyone who might
appreciate this sort of subject matter.

Thanks,
- Michael Walden