All code for 32-bit Watcom C assumes CauseWay DOS extender.
Most assembly-language (.asm) files require NASM.

xxx - farcall would be more useful if it supported other memory models
It needs its own structure definition; because both "union REGS"
and "struct REGPACK" have different layouts between Turbo C and Watcom C.

a20.asm         (DOS or no OS) Enables/disables A20 gate; various methods
asm-demo.zip    10 assembly-language 'hello' programs for three OSes (DOS,
                Windows, Linux), using four assemblers (NASM, as, TASM, WASM)
                and five linkers (alink, tlink, ilink32, ld, wlink)
bankblit.c      (DOS) blit() function for VBE 1.x banked framebuffer
chkhd.c         (Turbo C) Examines partition tables for errors
cutwav.c        (ANSI C) Copies part of PCM .WAV file to a new .WAV file
disk.c          (Turbo C or 16-bit Watcom C) Sector-level disk I/O (CHS & LBA)
disk32.c        (DJGPP or 32-bit Watcom C) Sector-level disk I/O (CHS & LBA)
djint.c         (DJGPP) Interrupt demo
dosclip.c       (Turbo C or 16-bit Watcom C) DOS access to Windows clipboard
dosreg.c        (Turbo C) DOS access to Windows registry
dumpavi.c       (ANSI C) Dumps .AVI files
dumpjpeg.c      (ANSI C) Dumps .JPG files
dumpmov.c       (ANSI C) Dumps .MOV files
dumppng.c       (ANSI C) Dumps .PNG files
dumpwav.c       (ANSI C) Dumps .WAV files
farcall.zip     (NASM; Turbo C) Similar to intr() but does far call
fatboot.zip     (NASM; no OS) FAT12 bootsector for floppy disk w/ test program
fonread.c       (DOS) Displays characters in .FON bitmap font files
img2htm.c       (ANSI C) Generates HTML <IMG> tag for .GIF/.PNG/.JPG files
index.txt       -- This file --
kbhit.c         (UNIX) kbhit() and getch() routines for UNIX
lzss.c          (ANSI C) LZSS data compression (Microsoft COMPRESS/EXPAND)
motoroff.asm    (DOS or no OS) Snippet to turn off floppy drive motors
pc-kbd.c        (DOS) PC keyboard demo
pc-rtc.c        (DOS) PC realtime clock demo
pc-timer.c      (DOS) PC timer demo
pci.c           (DOS) PCI demo code
pmode.asm       (DOS or no OS) Simple protected mode demo code
pnpbio32.c      (DJGPP or 32-bit Watcom C) Calls 16-bit PnP BIOS (thunking)
pollout.c       (DOS) Simple polled serial port output
printf.c        (any) Minimal printf() function (no floating point)
runreloc.zip    (?) Loads and runs ELF, COFF, and PE relocatable (.o) files
setjmp.c        (various OSes) Cooperative multitasking with setjmp/longjmp
tblchk.c        (ANSI C) Checks depth of nested tables in HTML files
tcint.c         (Turbo C) Interrupt demo
tidycoff.c      (DJGPP) Zeroes uninitialized areas of DJGPP COFF executables
unreal.asm      (DOS or no OS) Snippet to enable 'unreal' mode
untran.c        (ANSI C) Turns off transparency in .GIF files
v86mm.zip       (DOS or no OS) Virtual-8086 mode monitor
vbe.c           (Turbo C or 16-bit Watcom C) VBE mode-set and graphics demo
vbe32.c         (DJGPP or 32-bit Watcom C) VBE mode-set and graphics demo
wat16int.c      (16-bit Watcom C) Interrupt demo
wat32int.c      (32-bit Watcom C) Interrupt demo

To do:
- Output file name should be given on command line for cutwav.c
- Write CUTMP3.C
- Redo PNPBIO32.C to use global variables in thunk_help, so 32-bit code
  can call a 16-bit function with an arbitrary number of arguments.
- UNTRAN for PNG files
  Still needs to support interlace and overwrite input file.
- Interrupt-driven serial I/O
- Improved version of MODE CON... that sets various text modes
- UDP and TCP server and client demo code
- DOS TCP/IP code that tunnels into Win9x WSOCK.VXD/WSOCK2.VXD
        Needs gethostbyname(), DNS client, registry functions that
        tunnel into VMM.VXD (to get DNS server name from registry),
        and decent farcall()
- Set VGA video modes without using the BIOS
- Driver code for various sound boards (WSS/Crystal, ES1371, other)
- Add comment block to GIF and JPEG (and PNG?) files
- DOS CD player/ripper
- Tetris. Other games?
- RECURSE.C ?
- MBLOAD