ibm xt

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Introduced March 8, 1983
Discontinued  
Introduction Price  

 

System Architecture
Microprocessor Intel 8088 (AMD's 8088 version was also used)
Clock speed 4.77Mhz
Bus type ISA (Industry Standard Architecture)
Bus width 8-bit
Interrupt levels 8 (6 usable)
DMA channels 4 (3 usable)

 

Memory
Standard on system board 256k or 640k
Maximum on system board 256k or 640k
Maximum total memory 640k
Memory speed and type 200ns dynamic ram chips
System board memory socket type 16 pin DIP
Number of memory module sockets 36 (4 banks of 9)
Memory used on system board 36 64k X 1-bit DRAM chips in 4 banks of 9 or

2 banks of 9 256k X 1-bit and

2 banks of 9 64k X 1-bit chips

Standard Features     Disk Storage  
ROM size 40k or 64k ***** Internal disk and tape drive bays 2 full height or 4 half height
Optional math coprocessor 8087 ***** Standard floppy drives 1 X 360k
Standard graphics none   Optional floppy drives:  
Parallel printer ports 1 (some models)   * 5 1/4 inch 360k Optional
RS232C serial ports 1 (some models)   * 5 1/4 inch 1.2MB No
Mouse ports none   * 3 1/2 inch 720k Optional
UART chip used NS8250B   * 3 1/2 inch 1.44MB No
Maximum speed 9600bps   * 3 1/2 inch 2.88MB No
CMOS real time clock no   Hard disk controller included ST-506/412 (Xebec Model 1210)
CMOS RAM none   Hard Drive Capacity 10MB or 20MB
Expansion Slots     Keyboard Specs.  
Total adapter slots 8-8 bit   Number of keys 83 (later versions 101)
Number of 8/16/32 bit slots 8/0/0   Keyboard cable length 6 feet
Physical Specs.     Enviromental Specs.  
Dimensions:     Power supply output 130 watts
* Height 5.5 inches   Operating voltage @ 60 Hz 90 - 137 VAC
* Width 19.5 inches   Maximum current 4.2 amps
* Depth 16.0 inches      
* Weight 32 pounds