Windows 1.0/Development Release 1: Difference between revisions

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Development Release #1
Kernel version 1.0
CPU architecture x86 (16-bit)
Edition -
BIOS date May 1984

Development Release #1 is one of the earliest pre-release builds of the Microsoft Windows operating system, compiled sometime in May 1984. It was demonstrated on the Tandy 2000 personal computer.

Overview

The Tandy 2000 was an Intel 80186-based computer. Since the 80186 processor was not fully compatible with the IBM PC and compatibles, this created compatibility issues dividing it from other machines of the time. This build was most likely specifically designed for the Tandy 2000 personal computer, including the Intel 80186 processor and also the high resolution graphics (640x400 screen resolution at 16 colors) used by the machine itself.

This build was launched from a file called DEMO.BAT and was intended to be run from a single floppy disk. This loaded a copy of Windows with several sample applications which could easily be loaded from there.

This build also predates NE and uses the .MOD extension as the main executable format.

Files included

This build came with the following files:

  • BOXES.MOD/BOXES.RES - Boxes application
  • CALC.MOD/CALC.RES - Calculator application
  • CLIP.MOD/CLIP.RES - Clipboard application
  • COMMAND.COM - Microsoft MS-DOS command interpreter
  • CONFIG.BIN - The system configuration file
  • CURSOR.MOD - The Cursor Routines file
  • DEMO.BAT - A batch file used to launch the Microsoft Windows demonstration
  • DISPLAY.MOD - Display driver
  • FONT.RES - Font resources
  • GDI.MOD - GDI (Graphics Device Interface) system file
  • GDI16.MOD - GDI (Graphics Device Interface) 16-bit system file
  • GDI8.MOD - GDI (Graphics Device Interface) 8-bit system file
  • KERNEL.MOD - Microsoft Windows kernel system file
  • KEYBOARD.MOD - Keyboard system file
  • KEYNAMES.BIN - Input translation table lookup file
  • MB.EXE - Module boot
  • MOUSE.MOD - Mouse driver
  • PUZZLE.MOD/PUZZLE.RES - Puzzle application
  • REVERSI.MOD/REVERSI.RES - Reversi application
  • SAMPLE.MOD/ SAMPLE.RES - Sample application
  • SHELL.MOD/SHELL.RES - "DOS Window" shell application (later became MS-DOS Executive (MSDOS.EXE)
  • TEST.MOD - Test executable file
  • TIMER.MOD - System timer driver
  • WINDOWS.MOD/WINDOWS.RES - Microsoft Windows User component