IBM 09F1889 | 8-Ports RS-232C Electrical Interface Board for PS/2 Model 55 SX HMS

Here are the technical specs for the IBM 8-Ports RS-232C Electrical Interface Board for PS/2 Model 55 SX HMS:

- Ports: 8 RS-232C serial ports
- Compatibility: IBM PS/2 Model 55 SX HMS
- Interface: Electrical
- Data transfer rate: Up to 19.2 Kbps
- Connector type: DB-25
- IRQ: Configurable
- DMA: Not supported

Helpful notes:
1. This interface board allows you to connect up to 8 RS-232C devices to your IBM PS/2 Model 55 SX HMS.
2. The DB-25 connector type is a standard serial port connector used on many older devices.
3. The configurable IRQ allows you to avoid conflicts with other devices in your system.