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Here are asm source codes for parallel port dma and fifo fast transfer of data. They are command line programs for dos and Win95/98. With winio they can be used in WinNT/2000/XP. Transfer rates up to 750 kbytes/sec. Recurrences directories.
Input/output (IO) C library exposing a common API for real mode and permission-restricted access to parallel port under Windows, Linux and MS-DOS operative systems. It also allows pin-by-pin port access.
The Delphi WDosX Project Library (DWPL) is an Open Source
cross-platform library (based on FreeCLX) to make the development
of 32-bit DOS programs with Delphi (using WDOSX) flawless, and to make the
UI created with CLX available to DOS programs.
PCEmu is a software-only PC emulator. It emulates an 8086-based machine with VGA text graphics, EMS memory, host file system access, and `hardware' debugging. It runs DOS and most programs correctly.