HP E1418A - Manual (Page 128)

Device Type
Register
The Device Type Register is a VXIbus required register. This register
indicates the module’s configuration as either an 8-channel DAC or a
16-channel DAC. A read of this register returns 5230
16
(21040 decimal) if
the module is configured as a 16-channel DAC, or 5237
16
(21047 decimal)
if the module is configured as an 8-channel DAC.
Address
Base + 02
16
Bit Position 15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 00
Setting 5
16
230
16
or 237
16
READ Required Memory Model Codes
Required Memory: The HP E1418A requires 256 kbytes of A24 address
space.
Model Codes: The model codes for the HP E1418A are shown in the table
below.
Configuration Model-Code
Value
Register Read
Value
16-channel DAC 230
16
5230
16
8-channel DAC 237 16 5237 16
VXI Status/Control
Register
The VXI Status/Control Register is a VXIbus required register. As a READ
register, the value returned indicates the status of A24 memory access, the
MODID* line, and module readiness. As a WRITE register, the value
written can control the state of the A24 memory access, the control of the
VXIbus SYSFAIL* line, and perform a module reset.
Address
Base + 04
16
Bit 15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 00
READ A24
ACT
MODID* Unused Ready Passed Unused
WRITE A24
EN
Unused SYSINH RESET
READ A24 ACT: A one (1) in this field indicates that A24 memory can be
accessed (is active) via A24 addressing. A zero (0) indicates that A24
memory cannot be accessed via A24 addressing (is inactive). This bit
reflects the state of the write register A24 EN bit.
MODID*: A one (1) in this field indicates the module is not selected via
the P2 MODID line. A zero (0) in this field indicates the module is selected
by a high state on the P2 MODID line.
Ready: A one (1) in this field, together with a one (1) in the Passed bit,
indicates the module is ready for operation. A zero (0) in this field, together
with a 0 in the Passed bit, indicates the module failed initialization.
Appendix B HP E1418A Register-Based Programming 127
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