Vmebus Interface And Vmechip2 - Motorola MVME162FX Programmer's Reference Manual

Notes 1.
Note that MVME162FX models ordered without the VMEbus
interface are shipped with Flash memory blank (the factory uses the
VMEbus to program the Flash memory with debugger code). To
use the 162Bug package, MVME162Bug, in such models, be sure
that jumper header J22 is configured for the EPROM memory map.
Refer to Chapters 3 and 4 of the MVME162FX Installation and Use
documentation, V162FXA, for further details.

VMEbus Interface and VMEchip2

The local-bus-to-VMEbus interface and the VMEbus-to-local-bus
interface are provided by the optional VMEchip2. The VMEchip2
can also provide the VMEbus system controller functions. Refer to
the VMEchip2 description in Chapter 2 for detailed programming
information.
switch control.
RESET
2. Watchdog timer control.
3. Access and watchdog timer parameters.
4. MPU TEA (bus error) status
5. Bit numbering for VMEchip2 and MC2 chip have a
one-to-one correspondence.
6. switch interrupt control. Implemented in the
ABORT
VMEchip2 also, but with a different bit organization
(refer to the VMEchip2 description in Chapter 2). The
switch is wired to the MC2 chip but not the
ABORT
VMEchip2 in the MVME162FX implementation.
7. The SRAM and PROM decoder in the VMEchip2
(version 2) must be disabled by software before any
accesses are made to these address spaces.
8. 32-bit prescaler. The prescaler can also be accessed at
$FFF40064 when the optional VMEbus is not enabled.
Functional Description
1-7
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