According to NEC technical support, the most efficient way to connect the
Macintosh (with the older Apple 8-bit video card) is to use a cable from
Inline, Inc. (part number is IN9021). This connects the 15-pin connector on
the older Apple 8-bit video card to the 34-pin connector on the DM-3000P.
At this writing, NEC had not tested this cable with the newer Apple video
cards, but it may work unless there is a problem with the configuration of
the sense pin connections on the new cards. The sense pins are used to let
the new video cards know what mode to use.
Inline checked the configuration information and said that there is no need for
the NEC IPS-100 Computer Interface when connecting the DM-3000P to the
Macintosh. Their IN9021 cable, which is 15-pin-to-34-pin, is all that is
needed to connect the two.
For further information on Inline, search the Tech Info Library using
"Inline, Inc."