Xycom XVME 500, Manual

Page: 26 / 102

XVME-500/590 Manual
February, 1988
2.5.2 Supervisor/Non-Privileged Mode Selection
(J13)
The XVME-500/590 can be configured to respond only to Supervisory accesses, OR
to both Supervisory and Non-Privileged accesses. The key is the installation or
removal of jumper J13. Table 2-3 shows access options controlled by J13.
Table 2-3. Access Options
Jumper J13 Access Mode Selection Address Modifier Code
Installed Supervisory Only 2DH
Removed Supervisory or Non-Privileged 2DH or 29H
2.5.3 VMEbus Interrupt Options
(Jl0, Jll, 512)
Three interrupt jumpers (JI0, Jll, 512) select which VMEbus interrupt level is to be
used by the module. The input module can be programmed to generate an interrupt
at the completion of a conversion. These jumpers determine the level of that
interrupt. Interrupt-level jumper options are defined in Table 2-4.
In order to enable interrupts, a bit in the Status/Control register must be set (See
programming chapter Section 3.3.1).
Interrupt reset occurs during the interrupt-
acknowledge (IACK*) cycle.
A read from the lower byte of the analog-to-digital
conversion register, or a command to start another conversion, will reset the
interrupt bit.
Interrupts are also reset during a power-up sequence or when a
software reset is issued (See Table 2-4).
Table 2-4. Interrupt Level Jumpers
Jumpers
Jl0 J l l
J12
VMEbus Interrupt Level
0 0 0 Interrupts Disabled
0 0 1
1
0
1 0
2
0
1 1
3
1 0 0
4
1 0 1
5
1 1 0
6
1 1
1
7
NOTE: IN = LOGIC 0; OUT = LOGIC 1
2-10