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| (click on picture) |
| 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 |