[Linux-gpib-general] Re: HELP! - HP82341D, linux-gpib 3.1.3, kernel 2.4.5

[frank m. h. <fm...@st...>]

On Wed, 29 May 2002, Ed Sternin wrote:

> Unfortunately, all my efforts with HP/Agilent to get the information about
> the OTHER 24 i/o locations mapped out have failed so far (the PnP tools
> report that the card wants 32 i/o locations, while 9914 only needs 8
> registers).  It is also not clear where/how/if DMA mode is to be enabled,
> if supported.

It's a 16 bit card, it's possible it uses 16 io addresses for the 8
tms9914 registers, using 16 bits for each 9914 register (and wasting the
upper 8 bits).  Have you tried using outw/inw instead of outb/inb?  There
also should be additional registers for controlling the board's fifo.

I looked at the information you gathered on your web page.  How did you
determine the board uses a tms9914 chip?  Without more register-level
information, supporting this board does not look promising.  Have you
contracted HP about getting register level programming documentation for
the board?

Frank