ibm portable

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Introduced February 16, 1984
Discontinued April 2, 1986
Introduction Price  

 

System Architecture
Microprocessor Intel or AMD 8088
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
Maximum on system board 256k
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 chips)
Memory used on system board 36 64k X 1 bit DRAM chips in 4 banks of 9 chips
Standard Features     Disk Storage  
ROM size 40k ***** Internal disk and tape drive bays 2 half height
Optional math coprocessor 8087 ***** Standard floppy drives 1 or 2 X 360k
Standard graphics CGA with built in 9 inch amber CRT   Optional floppy drives:  
Parallel printer ports none   * 5 1/4 inch 360k Optional
RS232C serial ports none   * 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 No
CMOS RAM none      
Expansion Slots     Keyboard Specs.  
Total adapter slots 8-8 bit   Number of keys 83
Number of 8/16/32 bit slots 8/0/0   Keyboard cable length 6 feet
Physical Specs.     Enviromental Specs.  
Dimensions:     Power supply output 114 watts
* Height 8.0 inches   Operating voltage @ 60 Hz 104-127VAC
* Width 20.0 inches   Maximum current 4.0 amps
* Depth 17.0 inches      
* Weight 31 pounds