This is how to run Windows 1.01 in your browser and relive memories
Windows 1.01 was released in 1985 as one of the first operating systems with a graphical user interface (GUI), and went on to become the foundation for the Microsoft empire that keeps the brand alive today. With limited multitasking abilities and barebones graphics, the operating system sat on top of MS-DOS. Windows 1.01 allowed you to multitask DOS applications through a rudimentary taskbar. Further, Windows 1.01 did come with some classic programs like Notepad, MS Paint and Writer.
While the hardware of the emulated machine is highly configurable via XML, the PCjs emulates the Intel 8088 CPU at 4.77MHz, 256KB of RAM, and CGA graphics in the case of the Windows 1.01 machine. It looks like that PCjs is primarily interested in emulating all of the features in IBM PC BIOS that Windows 1.01 makes calls to, rather than emulating the specific hardware features of the IBM PC XT.
Windows 3 and 3.11 were the first versions of Windows that were widely used by almost everyone. While Windows 1.01 was mostly noticeable for bringing the concept of device drivers that let programs to easily interact/invoke with hardware (graphics cards, mice, printers, etc.) which previously could only be reached via the BIOS or bare metal. Windows 1 was not a huge success at the time, nor was its contemporary, the Apple Lisa II.
To try Windows 1.01 in your browser, visit here.