XVME-212 Manual
August, 1989
3.3 I/O INTERFACE BLOCK
The I/O Interface.Block of the XVME-212 contains the following programming locations
(as shown in Figure 3-1) which are defined in greater detail later in the chapter.
-
I.D. information (base+OlH to base+3FH): These locations provide information
specifying model number, manufacturer, and revision level.
Extended Status Register (base+80H) and Status/Control Register (base+8 1H):
These locations enable/disable interrupts from each of the four ports, indicate
if an interrupt is pending, and control the Pass and Fail LEDs.
-
Interrupt Acknowledge (IACK) Vector Register (base+83H), which holds the
vector to be driven on the VMEbus when a VMEbus interrupt generated by
the XVME-2 12 is acknowledged.
-
Data Registers which hold the data from the four ports.
Change registers which indicate whether data on any channel has changed.
Note
Reading or writing to undefined locations may
make application software incompatible with
future versions of this module.
3.4 MODULE IDENTIFICATION DATA (Base+0lH to 3FH - odd byte locations only)
The Xycom module identification scheme provides a unique method of registering
module-specific information in an ASCII encoded format. The I.D. data is provided as 32
ASCII encoded characters consisting of the board type, manufacturer identification,
module model number, number of 1K byte blocks occupied by the module, and module
functional revision level information.
This information can be read by the system
processor on power-up to verify the system configuration and operational status. Table
3-1 defines the identification information locations.
3-3
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