Notes:

I asked Russ about license notes in the original source files.  For
example, in amdpd.zip, the file PCNTPK.ASM seems to have conflicting
license information. The source file has this comment at the top:

;-----------------------------------------------------------------------
;Copyright (c) 1993 ADVANCED MICRO DEVICES, INC. All Rights Reserved.
;This software is unpblished and contains the trade secrets and
;confidential proprietary information of AMD. Unless otherwise provided
;in the Software Agreement associated herewith, it is licensed in confidence
;"AS IS" and is not to be reproduced in whole or part by any means except
;for backup. Use, duplication, or disclosure by the Government is subject
;to the restrictions in paragraph (b) (3) (B) of the Rights in Technical
;Data and Computer Software clause in DFAR 52.227-7013 (a) (Oct 1988).
;Software owned by Advanced Micro Devices, Inc., 901 Thompson Place,
;Sunnyvale, CA 94088.

But just below that, the source file has this comment:

;-----------------------------------------------------------------------
;  Copyright, 1990, Russell Nelson, Crynwr Software
;
;
;   This program is free software; you can redistribute it and/or modify
;   it under the terms of the GNU General Public License as published by
;   the Free Software Foundation, version 1.
;
;   This program is distributed in the hope that it will be useful,
;   but WITHOUT ANY WARRANTY; without even the implied warranty of
;   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
;   GNU General Public License for more details.
;
;   You should have received a copy of the GNU General Public License
;   along with this program; if not, write to the Free Software
;   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
;
;   Adapted for NE2100/AM1500T by Mike Ching, ching@angelo.amd.com
;   Modified 11/16/92 to preallocate buffers for -d operation.

That is, the file has a 1990 declaration that the code is under the
GNU General Public License v1, but a 1993 declaration by AMD that the
file is proprietary.

So I'm confused here. I believe the "AMD" statement was probably
applied in error, but I wanted to check.

Russ's reply: (Feb 8 2022)

> Yes, AMD applied in error. Who unpblishes software, anyway??