Appendix B
Using the DMAmove and CDS-852 Adapter Code Instruments
©
National Instruments Corporation
B-7
Figure 5-1.
GPIB-VXI/C Local Memory Map
You can use the DMAmove CI to perform any of the capabilities of the
DMAmove
function
including moving to or from VXI A16 space, VXI A24 space, or local GPIB-VXI/C memory.
It can transfer 8- or 16-bit quantities from either source or destination (they can be different).
It can increment or not increment addresses as it counts to give fast access to FIFO registers
or block memory.
The DMAmove CI reports current status and errors via its status byte and the REQT signal
(GPIB SRQ line). The following is a list of the status bytes returned by the DMAmove CI and
their corresponding meanings.
Expansion EPROM for
EPROMed Code
Instruments 512 KB
Runtime System
EPROM Area 512 KB
A24 Access
Window
pSOS Region 1 RAM 448 KB
Reserved RAM 64 KB
A16 Access Window
Reserved
Expansion RAM Available
for pSOS Region 1or User
0.5, 1.5, or 3.5 MB.
Addresses Without RAM
Installed Access
Corresponding A24 Address
Address
FFFFFFh
FF0000h
F80000h
F00000h
E80000h
400000h
080000h
010000h
000000h
