IBM PC AT (5170)
ID: IBM-PC-AT
RELEASED 1984
PRICE
DISCONTINUED 1987
UNITS SOLD Unknown
I/O PORTS
16-bit ISASerialParallel
System Analysis
Advanced Technology. Introduced the 16-bit ISA bus (AT Bus) and the 286 processor. Defined the AT form factor used for 15 years.
Processor
6 MHz / 8 MHzIntel 80286
Protected Mode introduced (though rarely used by DOS).
Audio Subsystem
1Speaker
Beeper.
Memory
DRAM256 KB
Expandable to 16 MB
Storage
20 MB1.2MB Floppy + 20MB HDD
Graphics Architecture
EGA
Palette: 16 from 64
- 640x350
Hardware Tricks
- ▹ Planar graphics
Did You Know?
- ? The AT keyboard layout is the ancestor of modern keyboards.
- ? First PC to include a battery-backed CMOS for settings.