B&B Electronics ESCLP-100 - Manual - Manual (Page 21)

3.9 Limitations
1. Performance is dependent on the computer system in which the software is used. In
general, more powerful systems and systems with lighter process loads can accommodate
the highest cumulative data throughput.
2. DMA serial ports are used only as standard interrupt-driven ports.
3. The OS/2 and DOS session MODE commands are not capable of working with ports
COM10 through COM32.
4. The interrupt status register support of Quatech ISA and MCA adapters does not permit
these adapters to share their IRQ level with any other device. Quatech PCI adapters can
share their IRQ level with any other device whose drivers support shared interrupts.
Quatech Asynchronous Serial Device Driver for OS/2 18