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General| Manufacturer | IBM |
|---|---|
| Model | Personal System/2 50 |
| Category | Desktop |
| CPU | Intel 80286 |
| CPU Speed | 10 MHz |
| RAM | 1 MB (expandable to 7 MB) |
| Floppy Drive | 1.44 MB 3.5-inch |
| Storage | 20 MB |
| Operating System | PC-DOS |
| Bus | Micro Channel Architecture (MCA) |
| Ports | Serial, Parallel |
| Expansion Slots | Three 16-bit MCA slots |
Defines the I/O addresses used by system board devices.
Details performance specifications for Type 1 and Type 2 system boards.
Describes the system's power supply unit, its inputs, and outputs.
Shows the organization of the I/O address space used by POS.
Details the bits and functions of the System Board Enable/Setup Register.
Defines the bits for controlling diskette, serial, and parallel ports.
Details POST routines and registers for Micro Channel architecture.
Explains the central arbitration control point's role in sharing system resources.
Shows the assignment of arbitration levels and priorities.
Describes the types of memory used in the Model 50 system.
Details the RT/CMOS chip, its clock, and configuration RAM.
Register for reading/writing RT/CMOS RAM and NMI masking.
Data register for reading/writing RT/CMOS RAM.
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