Motorola MVME712AM Installation guide Download

Diagnostic Facilities
GCSR Method
A remote processor can initiate program execution in the local MVME162
dual-port RAM by issuing a remote GO command using the VMEchip2 Global
Control and Status Registers (GCSR). The remote processor places the
MVME162 execution address in general purpose registers 0 and 1 (GPCSR0
and GPCSR1). The remote processor then sets bit 8 (SIG0) of the VMEchip2
LM/SIG register. This causes the MVME162 to install breakpoints and begin
execution. The result is identical to the MPCR method (with status code B)
described in the previous section.
The GCSR registers are accessed in the VMEbus short I/O space. Each general
purpose register is two bytes wide, occurring at an even address. The general
purpose register number 0 is at an offset of $8 (local bus) or $4 (VMEbus) from
the start of the GCSR registers. The local bus base address for the GCSR is
$FFF40100. The VMEbus base address for the GCSR depends on the group
select value and the board select value programmed in the Local Control and
Status Registers (LCSR) of the MVME162. The execution address is formed by
reading the GCSR general purpose registers in the following manner:
used as the upper 16 bits of the address
used as the lower 16 bits of the address
The address appears as:
Diagnostic Facilities
The 162Bug package includes a set of hardware diagnostics for testing and
troubleshooting the MVME162. To use the diagnostics, switch directories to
the diagnostic directory. If you are in the debugger directory, you can switch
to the diagnostic directory with the debugger command Switch Directories
(SD). The diagnostic prompt ("162-Diag>") appears. Refer to the
MVME162Bug Debugging Package User’s Manual for complete descriptions of
the diagnostic routines available and instructions on how to invoke them.
Note that some diagnostics depend on restart defaults that are set up only in a
particular restart mode. The documentation for such diagnostics includes
restart information.