NAME

       pcii — National Instruments PCIIA GPIB controller driver

SYNOPSIS

       device pcii

       In /boot/device.hints:
       hint.pcii.0.at="isa"
       hint.pcii.0.port="0x2e1"
       hint.pcii.0.irq="7"
       hint.pcii.0.drq="1"

DESCRIPTION

       The pcii driver provides support for driving an IEEE-488 bus, also called IEC-625 (or just "IEC bus"), or
       HP-IB  (Hewlett  Packard  Instrument Bus), or GPIB (General Purpose Instrument Bus).  The driver supports
       National Instruments PCIIA cards (sometimes also referred to as PC2A) and compatibles.  These cards use a
       NEC µPD7210 controller IC as the main interface between the host computer and the instrument bus.

   IO memory space layout
       The PCIIA cards use a very specific IO memory space allocation layout.  The address bits  A0  through  A9
       (which  have  traditionally  been  the  only  address  bits  evaluated  on IBM PC XT extension cards) are
       hardwired to address 0x2e1.  Bits A10 through A12 are used by the µPD7210 register  select  lines.   This
       makes  the  individual 7210 registers being 0x400 bytes apart in the ISA bus address space.  Address bits
       A13 and A14 are compared to a DIP switch setting on the card, allowing for up to 4 different cards  being
       installed  (at  base  addresses  0x2e1,  0x22e1, 0x42e1, and 0x62e1, respectively).  A15 has been used to
       select an optional on-board time-of-day clock chip (MM58167A) on  the  original  PCIIA  rather  than  the
       µPD7210 (which is not implemented on later boards and clones).  Finally, the IO addresses 0x2f0 ... 0x2f7
       are  used for a special interrupt handling feature (re-enable interrupts so the IRQ can be shared), where
       actually only address 0x2f0 plus the actual IRQ level is required for each  card.   Some  clones  do  not
       appear to require this special IRQ handling, and are thus likely to not support the shared IRQ feature.

       Only the base address of the card needs to be specified in the ISA device hints; the driver takes care to
       derive all other IO addresses needed during the probe phase.

   Supported cards
       The following cards are known to be supported:

             •   B&C Microsystems PC488A-0

             •   National Instruments GPIB-PCII/PCIIA (in PCIIa mode)

             •   Axiom AX5488

SEE ALSO

       gpib(3), gpib(4), device.hints(5)

HISTORY

       The pcii driver was written by Poul-Henning Kamp, and first appeared in FreeBSD 5.4.

AUTHORS

       This manual page was written by Jörg Wunsch.

Debian                                          January 24, 2010                                         PCII(4)