Technical information

Serial Solutions What To Do First

serial port will have its own unique interrupt line.

or b) Interrupt On Multiport Cards with Interrupt Sharing.

The interrupt sharing system used if the port is on a

multiport card that is using a shared interrupt mechanism.

Cards with a shared interrupt line typically have a special

servicing.

These parameters are passed to NEWCOM.SYS, the Serial

Solutions device driver, by command line arguments in the

CONFIG.SYS file.

Apart from the standard COM1 and COM2 ports, this

information will have to be given for each COM port used by

Serial Solutions. The Address and the Interrupt are physically

set on the serial card by jumpers or dip switches. The Serial

Solutions address and interrupt must match that actually set on

the card.

Setting Up For COM3.____________________

Assuming that the serial port card has been set by jumpers or

dip switches to the following:-

COM3 i/o address 03E8 hex using interrupt IRQ 10.

Then the entry in the CONFIG.SYS file would be:-

device=c:\newcom.sys /A3,3E8 /I3,10

If the external serial device can handle data as fast as we can

send it then we can assume that no handshaking is necessary. So

the entry becomes:-

device=c:\newcom.sys /A3,3E8 /I3,10 /H3,4

The /A3 parameter means the address of COM3 is being set.

The /I3 parameter means the interrupt used by COM3 is being

set.

The /H3 parameter means the handshake used by COM3 is being

set.

Page 4 Chapter 1