Interrupt Acknowledge Map; Vmebus Memory Map; Vmebus Accesses To The Local Bus - Motorola MVME167-32 User Manual

Operating Instructions
10. Eight bytes are reserved for the printed wiring board (PWB) number assigned to
the first mezzanine board in ASCII format. This does not include the
For example, for a 16MB parity mezzanine at revision E, the PWB field contains:
3
11. Eight bytes are reserved for the serial number assigned to the first mezzanine
board in ASCII format.
12. Eight bytes are reserved for the printed wiring board (PWB) number assigned to
the optional second mezzanine board in ASCII format.
13. Eight bytes are reserved for the serial number assigned to the optional second
mezzanine board in ASCII format.
14. Growth space (153 bytes) is reserved. This pads the structure to an even 256 bytes.
System-specific items, such as size of system side, and systems side version, may
go here.
15. The final one byte of the area is reserved for a checksum (as defined in the
MVME167Bug Debugging Package User's Manual and the Debugging Package
for Motorola 68K CISC CPUs User's Manual) for security and data integrity of
the configuration area of the NVRAM. This data is stored in hexadecimal format.

Interrupt Acknowledge Map

The local bus distinguishes interrupt acknowledge cycles from other cycles by placing
the binary value %11 on TT1-TT0. It also specifies the level that is being
acknowledged using TM2-TM0. The interrupt handler selects which device within that
level is being acknowledged.
On the MVME187, a read anywhere from location $FFFE0004 through $FFFE001C
causes an interrupt acknowledge cycle at the specified level. This does not do so on the
MVME167. Refer to the PCCchip2 information in the
MVME166/MVME167/MVME187 Single Board Computers Programmer's Reference
Guide for information on reading the current interrupt level and setting the interrupt
mask.

VMEbus Memory Map

This section describes the mapping of local resources as viewed by VMEbus masters.

VMEbus Accesses to the Local Bus

The VMEchip2 includes a user-programmable map decoder for the VMEbus to local
bus interface. The map decoder allows you to program the starting and ending address
and the modifiers the MVME167 responds to.
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MVME167 Single Board Computer User's Manual
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