ibm laptop

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ibm5140a.jpg (45456 bytes)
ibm5140b.jpg (29767 bytes)
(click on picture)

 

 

 

Introduced August 12, 1981
Discontinued April 2, 1987
Introduction Price  

 

System Architecture
Microprocessor 80C88
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 512k
Memory speed and type 200ns CMOS Static ram chips
Standard Features     Disk Storage  
ROM size 64k ***** Internal disk and tape drive bays 2 half height
Optional math coprocessor ? ***** Standard floppy drives 2 - 3 1/2" FDD
Standard graphics none   Optional floppy drives:  
Parallel printer ports none   * 5 1/4 inch 360k No
RS232C serial ports none   * 5 1/4 inch 1.2MB No
Mouse ports none   * 3 1/2 inch 720k Standard
UART chip used     * 3 1/2 inch 1.44MB No
Maximum speed     * 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 5-8 bit   Number of keys 78
Number of 8/16/32 bit slots 5/0/0   Keyboard cable length none
Physical Specs.     Enviromental Specs.  
Dimensions:     Power supply output 15VDC
* Height 14.17 inches   Operating voltage @ 60 Hz 104-127VAC
* Width 12.19 inches   Maximum current  
* Depth 16.0 inches      
* Weight (including battery) 12.17 pounds