The PC-RETRO Kit Beta (Catalog #PC-RETRO) is a hobby electronics kit for building a faithful reproduction of the classic IBM PC 5150 motherboard from 1982.
Many early IBM PC compatible games between 1981 and 1988 were known as PC booters. These games were distributed on 5¼" or, later, 3½", floppy disks that booted directly, meaning once they were inserted in the drive and the computer was turned on, a custom operating system on the diskette took over and ran the program. This was commonly used as a form of copy protection until it became obsolete as games grew larger.
Xi 8088 is an IBM PC/XT compatible processor board in ISA board form factor. It offers several enhancements over the standard IBM PC/XT, such as support of PS/2 keyboard and mouse and built-in real-time clock with NVRAM (also known as CMOS setup memory).