IBM PC/AT

For general informaton see :IBM Personal Computer XT - Wikipedia, the free encyclopedia

My working machine (with a bi-sync monitor because my EGA is out of service)

Checkit running , configuration of the above computer

Enhanced model AT type 2 motherboard

Everything on this computer is 100% original as sold by IBM from August  14 ,1984 on

512 k RAM ,Clock rate 8 Mhz ,  21 Mb Hard disk (type 2) and floppy 1.2Mb

EGA Video display adapter , 1 serial / parallel adapter

Inside were AMI  ROM's 4/9/90 that I replaced by the original IBM Bios Rom's 11/15/85

Hard disk controller =WD1002-WA2

Enhanced 101-key 3270-style keyboard

Software

To test the computer use the IBM advanced diagnostics discette , here image of version 2.07 atdg207.exe  This is a self extracting exe file You need no software to make the disk .Just run this file under Windows XT and it will make a bootable floppy disk in your A-Drive . If your A-Drive is a 1.44 Mb type , format first a 720K floppy , leave it in the A: drive before running the program . This 720K floppy is logically just the same as a 360K floppy or drive only it has 80 in stead of 40 tracks , so you can use diskcopy to make a 360K disk .If you have troubles , just send me a e-mail and i will send you the 51/4" floppy by post.

To explore his possibilities ,here image of the exploring the IBM computer AT discette ref 6139350 EXPLOAT.IMD

see DAVES OLD COMPUTERS - Disk/Software Image Archive for information on image files

Both disks are 360K format boot disks that are read by the 1.2Mb floppy drive.

Type 2 motherboard

Type 1  motherboard

EGA adapter with additional memory

Serial/parallel adapter

Documentation

Last update 13/11/2008