the i/o address 21 is used by the com2 port.
the i/o address 21 is used by the com2 port.
which i/o address is used by the com2 port?
21
Na
Na
bullet::::- com1 (dr-dos 7.02 and higher only): defines count and logical order and configures i/o address and timeout for com1: device.









































bullet::::- com2 (dr-dos 7.02 and higher only) : defines count and logical order and configures i/o address and timeout for com2: device.









































bullet::::- com3 (dr-dos 7.02 and higher only) : defines count and logical order and configures i/o address and timeout for com3: device.









































bullet::::- com4 (dr-dos 7.02 and higher only) : defines count and logical order and configures i/o address and timeout for com4: device.









































bullet::::- comarea (pts-dos only) : specifies buffer for dma.
config.sys