IBM PC XT (model 5160)
IBM
Specifications
- CPU
- Intel 8088 @ 4.77 MHz
- Memory
- 128 KB standard, up to 640 KB
- Storage
- 10 MB hard drive (Seagate ST-412), one 360 KB floppy
- Display
- MDA or CGA
- OS
- PC DOS 2.0 (added subdirectories and hard-drive support)
- Intro price
- $7,545 with the hard drive
The machine
The first IBM PC shipped with a built-in hard drive. PC DOS 2.0, released alongside it, introduced the hierarchical file system Unix users had been enjoying for years.
Why it matters
Hard drives moved from optional peripheral to default expectation. The XT also dropped the cassette port — nobody noticed.