| DL(4) | Device Drivers Manual (vax) | DL(4) | 
dl —
dl0 at uba? csr 0176500
dl1 at uba? csr 0176510
dl2 at uba? csr 0176520
dl3 at uba? csr 0176530
dl driver controls a DL-11-compatible asynchronous
  serial card, and probably things compatible with it. A four-port DLV-11J will
  appear four times in the device list, as the ports look like separate cards to
  the driver.
The dl driver provides the normal
    interface described in tty(4),
    but many of the configuration calls are unsupported, since their functions
    are handled by jumpers or switches on the serial card itself. Calls related
    to modem-control lines are also ignored, since these cards lack them.
There's a chance this driver might also work with an LP11, an LPV11 or even a PC11, but it hasn't been tested.
dl driver was written for NetBSD
  1.3.
There is no support in the driver for the paper-tape reader on an LT33 attached via a DLV-11KA or similar.
The overrun message is logged in the interrupt routine itself, which will probably just make the problem worse.
The CSR printed on startup is that of the receiver, while the interrupt vector is that of the transmitter.
In order to determine the card's interrupt vector, the driver
    sends a NUL to each port. This may confuse things
    attached to them.
The driver has so far only been tested on a DLV-11J. It may or may not work on the other cards it claims to support.
| January 28, 1997 | NetBSD 9.4 |