Back to index

Info for ibmat


====== IBM PC/AT (1984) ======




===== Features =====

* CPU: Intel 80286 6 MHz
* RAM: 512 KB (up to 3 MB)
* ROM: 64 KB
* Text Modes: 80 x 24 / 40 x 24
* Graphic Modes: 640 x 350 (EGA mode)
* Colors: 64
* Sound: Beeper
* I/O Ports: 8 x internal slots (six 16 bit ISA and two 8 bit ISA), RS232c, Centronics
* Keyboard: Full stroke keyboard with numeric keypad and function keys
* Built In Media: one 5.25" disk-drive, various Hard disk drives, from 20 MB
* OS: MS-DOS
* Built In Language: Microsoft Basic interpreter



===== Known Issues =====

* Preliminary driver
* Rough Emulation of: keyboard, keyboard controller, dma chips, pic chips
* Incomplete Emulation of the CPU
* No Support for: high density disks, AT harddisks
* Needs i80286 v1.5



===== History and Trivia =====

Extended IBM PC.

The IBM PC AT was the successor of the PC and the XT. IBM added a lot of new features: they abandoned the old Intel 8086 to the Intel 80286, so the PC AT used new 16 bit expansion slots.

The PC AT had a new version of the Microsoft OS: MS-DOS 3.0 which could manage the new 5.25" floppy disk format (1.2 MB), the new hard disk capacities (20 MB and more) and allowed file sharing. It had a new keyboard too (the same we use now, more or less) with cursor keys and a key that could lock it.

Two models were launched: the PC-AT model 1 (256 KB RAM, two floppy disk units and a color screen) and the PC-AT Model 2 (512 KB RAM, one floppy disk unit, one hard disk and a color screen).

This computer was revolutionary, but it was the last time IBM imposed a standard to the PC clone industry. The next year, the first PC based on a 80386 was made by Compaq and IBM failed to impose the PS/2 standard in 1986.

//(info from old-computers.com)//



===== Links =====

* PC / AT at old-computers.com -- http://old-computers.com/museum/computer.asp?c=185



===== Other Emulators =====

* Bochs -- http://bochs.sourceforge.net/
* Virtual PC for Linux, Mac, NT (commercial) -- http://www.microsoft.com/windows/products/winfamily/virtualpc/default.mspx




Generated on Sun Jul 19 10:17:28 2009