# History of video games/Platforms/IBM Personal Computer
## History
### Development

The IBM 5100 of 1975 was the first minicomputer made by IBM. APL models of the 5100 could essentially emulate a IBM System 360 mainframe.
The accelerate development the IBM PC was developed in the span of 12 months by extensively using components made by other companies.

### Launch

A press release by IBM in late August 1981 touts the capabilities of the IBM 5150, including a brief mention that the system can be used to easily play video games.
The IBM 5150 was released in September of 1981 at a base cost of around $1,565, a home use setup costing around $3005, and a business system costing around $4,500. Because the only thing IBM actually made for the IBM PC was the BIOS, clones of the system existed within a year, though were quickly stopped by legal action. Compaq made a clone with a legally engineered compatible BIOS, paving the way for other clones to create the modern PC platform.

## Technology

There are many iterations of the IBM Personal Computer. This section covers the IBM 5150 model.
An 16-bit x86 architecture Intel 8088 CPU clocked at 4.77 megahertz powers the IBM 5150. The IBM 5150 came with 16 kilobytes of RAM standard, and could be configured with up to 256 kilobytes of RAM. The IBM 5150 shipped with 40 kilobytes of ROM.
The only custom part was the BIOS chip. As mentioned earlier, once that was reverse engineered using clean room techniques, many legal clone machines were brought to the market. These clones were often cheaper or sported features the official IBM PC models lacked.

## Gallery
### IBM 5150

* An operating IBM 5150.
* A 1981 IBM PC Motherboard.
* An IBM VGA graphics card.
* The original IBM PC Game Control adapter card.
* Gorillas, a demo video game which came with the IBM PC's operating system.Gorillas, a demo video game which came with the IBM PC's operating system.
* A floppy disk duplication setup.

### Related IBM Computers

* An IBM PCjr
* An IBM PC XT
* The IBM 5100, a technologically distinct and far less popular predecessor to the IBM PC.
* An IBM Personal System/1.
* An IBM Personal System/2 mouse.

### Ad-Lib sound output

- An example music file similar to what would run on real Ad-Lib hardware. Note that the IBM PC did not originally ship with this hardware.

## References

* 1 2 "IBM 5100 computer". oldcomputers.net. Retrieved 27 November 2020.
* ↑ "IBM Archives: The birth of the IBM PC". www.ibm.com. 23 January 2003. Retrieved 27 November 2020.
* 1 2 "IBM Archives: Announcement press release". www.ibm.com. 23 January 2003. Retrieved 27 November 2020.
* 1 2 "IBM 5150 Personal Computer". oldcomputers.net. Retrieved 27 November 2020.
* ↑ "Send in the Clones - CHM Revolution". www.computerhistory.org. Retrieved 27 November 2020.
* ↑ "Tales from 80s Tech: How Compaq's Clone Computers Skirted IBM's IP and Gave Rise to EISA - News". www.allaboutcircuits.com. Retrieved 27 November 2020.
* ↑ "The IBM Compatible or Clone - History of the Progression of Computer Technology - Electronic Tutorials and Circuits". www.hobbyprojects.com. Retrieved 27 November 2020.
* 1 2 "IBM Archives: Product fact sheet". www.ibm.com. 23 January 2003. Retrieved 27 November 2020.
* ↑ "Send in the Clones - CHM Revolution". www.computerhistory.org. Retrieved 1 March 2021.
* ↑ Haigh, Thomas. "The IBM PC: From Beige Box to Industry Standard". cacm.acm.org. Retrieved 1 March 2021.