Specifications

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Manufacturer Device Name
Advantech PCL-814B pcl814b
PCL 816 and 814B have 16 SE/DIFF ADCs, 16 DACs, 16 DI and 16 DO.
Differences are at resolution (16 vs 12 bits).
The driver support AI command mode, other subdevices not written.
Analog output and digital input and output are not supported.
Configuration Options:
[0] - IO Base
[1] - IRQ (0=disable, 2, 3, 4, 5, 6, 7)
[2] - DMA (0=disable, 1, 3)
[3] - 0, 10=10MHz clock for 8254
1= 1MHz clock for 8254
5.5.86 pcl818 -- Advantech PCL-818 cards, PCL-718
Author: Michal Dobes <[e-mail]>
Status: works
Manufacturer Device Name
Advantech PCL-818L pcl818l
Advantech PCL-818H pcl818h
Advantech PCL-818HD pcl818hd
Advantech PCL-818HG pcl818hg
Advantech PCL-818 pcl818
Advantech PCL-718 pcl718
All cards have 16 SE/8 DIFF ADCs, one or two DACs, 16 DI and 16 DO.
Differences are only at maximal sample speed, range list and FIFO
support.
The driver support AI mode 0, 1, 3 other subdevices (AO, DI, DO) support
only mode 0. If DMA/FIFO/INT are disabled then AI support only mode 0.
PCL-818HD and PCL-818HG support 1kword FIFO. Driver support this FIFO
but this code is untested.
A word or two about DMA. Driver support DMA operations at two ways:
1) DMA uses two buffers and after one is filled then is generated
INT and DMA restart with second buffer. With this mode I’m unable run
more that 80Ksamples/secs without data dropouts on K6/233.
2) DMA uses one buffer and run in autoinit mode and the data are
from DMA buffer moved on the fly with 2kHz interrupts from RTC.
This mode is used if the interrupt 8 is available for allocation.
If not, then first DMA mode is used. With this I can run at
full speed one card (100ksamples/secs) or two cards with
60ksamples/secs each (more is problem on account of ISA limitations).
To use this mode you must have compiled kernel with disabled
"Enhanced Real Time Clock Support".
Maybe you can have problems if you use xntpd or similar.