|
| Introduced |
August 12, 1981 |
| Discontinued |
April 2, 1987 |
| Introduction Price |
|
| Microprocessor |
Intel 8088 used in early models
(AMD was used in later models) |
| Clock speed |
4.77Mhz |
| Bus type |
ISA (Industry Standard
Architecture) |
| Bus width |
8-bit |
| Interrupt levels |
8 (6 usable) |
| DMA channels |
4 (3 usable) |
| Standard on system board |
16k, 64k, or 256k(only after
1983) |
| Maximum on system board |
64k or 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 |
27 (3 banks of 9 chips) |
| Memory used on system board |
1 soldered bank of 9-16k X
1(early) or 64k X 1(later) bit chips. 27-16k X 1 for early PC's (Pre 1983) or
27-64k X 1 for PC's after 1983
|
Standard
Features
|
|
|
Disk
Storage
|
|
| ROM size |
40k |
***** |
Internal disk and tape drive
bays |
2 full height |
| Optional math coprocessor |
8087 |
***** |
Standard floppy drives |
1 X 360k |
| Standard graphics |
none |
|
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 |
5-8 bit |
|
Number of keys |
83 |
| Number of 8/16/32 bit slots |
5/0/0 |
|
Keyboard cable length |
6 feet |
Physical
Specs.
|
|
|
Environmental
Specs.
|
|
| Dimensions: |
|
|
Power supply output |
63.5 watts |
| * Height |
5.5 inches |
|
Operating voltage @ 60 Hz |
104-127VAC |
| * Width |
19.5 inches |
|
Maximum current |
2.5 amps |
| * Depth |
16.0 inches |
|
|
|
| * Weight |
25 pounds |
|
|
|
|
