HP 98568A Installation Instruction page 89

HP 986208
DMA Controller Card
Description and Support
The HP 98620B Direct Memory Access (DMA) Controller Card provides two
DMA channels for I/O transfer. This high speed I/O capability works with
GPIO, HP-IB and Disk interfaces to increase the maximum data exchange rate
between the computer and its peripherals.
After the computer sets up a direct memory transfer on the DMA Controller
Card, the controller handles the transfer without further intervention from
the computer. This frees the computer to do other things while the transfer
continues automatically at the fastest transfer rate possible.
HP 986208 DMA Controller Card
Series 300 HP-UX Operating System Support
on Release with Model
5.0 or later 320
NOTE:
Do
not
use this DMA card with models
other than the 320. Another DMA card,
the
98620C,
is built into 32-bit models
like the 330, 350, and 360.
Installation Procedure
Note
The DMA Controller Card cannot be installed in an HP 9888A
Backplane Expander. It can be installed in an HP 98568A
Backplane Expander, however.
1. Turn your computer off.
2. Remove the painted cover plates from the back of your cOlnputer until you
find an empty slot. Do not remove the silver cover plates on the bottOlll of a
Series 300 computer.
Adding Accessory Cards 4-13