IBM AT 5170

Spécifications techniques

Constructeur	IBM (US)
Microprocesseur	Intel 80286 @ 6 and 8 MHz
Mémoire vive (RAM)	256 Ko to 16 Mo
Mémoire morte (ROM)	640 KB
Capacités graphiques	Early ATs (1984–1986) could be equipped with CGA, MDA, EGA, or PGA video cards.
Capacités sonores	Beeper
Clavier	84-key AT keyboard layout: the 84th key being i.e. System Request; numerical keypad now clearly separated from main key group; also added indicator LEDs for Caps lock/Scroll lock/Num lock. The AT keyboard uses the same 5-pin DIN connector as the PC keyboard, but it uses a different, bidirectional interface (the PC and PC XT keyboard interface is unidirectional) and generates different keyboard scan codes. The bidirectional interface allows the computer to set the LED indicators on the keyboard, reset the keyboard, set the typematic rate, etc. Later ATs had 101-key keyboards which featured integrated numeric keypad with Num Lock key.
Interfaces	The AT motherboard had a 16-bit data bus and 24-bit address bus (16 MB) that was backward compatible with PC-style expansion cards (which were 8-bit data, 20-bit address).
Logiciels	PC DOS 3.0 and later, OS/2
Périfériques standards	Advanced high-performance Intel 80286 microprocessor ROM based automatic power on self test of system components ROM based BASIC language interpreter 8086 compatible real address mode Protected virtual address mode 256Kb of memory (Model 68) 512Kb of memory (Model 99) 1.2Mb high capacity diskette drive Diskette interface 20Mb fixed disk drive (Model 99) Fixed disk interface Fixed disk-in-use indicator light (red) Serial/parallel interface (Model 99) System clock/calendar/system configuration storage with battery back-up Sound system Keylock Bi-directional keyboard interface Enhanced keyboard Switchable worldwide power supply Power-on indicator light (green) Eight I/O expansion slots Socket for 80287 math co-processor 24-bit addressing 16-bit data path Seven-channel direct memory access (DMA) 16-level interrupt Three programmable timers
Dimensions	Height 82.55 mm (3.25 inches) Width 154.3 mm (6.1 inches) Depth 203.2 mm (8.0 inches
Poids	2.9 Kg
Mise en vente	1984