njata —
Workbit NinjaATA-32 CardBus IDE controller driver
njata* at cardbus? function ?
njata* at cardbus? function ? flags 0x01	# with wait
  0x01
The njata driver provides support for the following
  Workbit Bus-Master CardBus IDE controller chips:
  - NinjaATA-32Bi
- CardBus / PCMCIA dual mode IDE controller (“DuoATA”). This
      controller is mainly used for portable drives. This driver supports the
      CardBus mode.
- NPATA-32
- CardBus IDE controller. This controller is widely used for CardBus
      CompactFlash adapters.
 
These controllers are capable of bus-mastering for ATA PIO
    transfer. The njata driver uses the bus-mastering
    PIO transfer unless transfer buffer is unaligned, and significantly reduces
    CPU usage for PIO-only ATA devices compared with usual PIO transfer.
The optional flags parameter is the “wait” value for ATA
  transfers. Some combinations of host and device may fail without flags
  parameter or flags 0x00. In this case try adding wait
  values like flags 0x01 or flags
  0x11 (the wait parameter is composed of two 4-bit values). Smaller wait
  values should be faster. Too long waits may cause transfer errors.
The njata device driver first appeared in
  NetBSD 4.0.