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GCSR Method
A remote processor can initiate program execution in the local MVME197LE
dual-port RAM by issuing a remote GO command using the VMEchip2 Global
Control and Status Register (GCSR). The remote processor places the
MVME197LE 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 MVME197LE 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 peripheral bus) or $4
(VMEbus) from the start of the GCSR registers. The local peripheral 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 MVME197LE. The
execution address is formed by reading the GCSR general purpose registers in
the following manner:
GPCSR0
GPCSR1
The address appears as:
Diagnostic Facilities
Included in the 197Bug package is a complete set of hardware diagnostics
intended for testing and troubleshooting of the MVME197LE (refer to the
MVME197 Single Board Computer Diagnostic Firmware User's Manual). In order
to use the diagnostics, the user must switch directories to the diagnostic
directory. If in the debugger directory, the user can switch to the diagnostic
directory by entering the debugger command Switch Directories (SD). The
diagnostic prompt ("197-Diag>") should appear. Refer to the MVME197 Single
Board Computer Diagnostic Firmware 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. Refer to the documentation on a particular diagnostic
for the correct mode.
MVME197LEIG/D1
Solution Systems Technologies Inc.
720-565-5995 | info@solusys.com | www.solusys.com
used as the upper 16 bits of the address
used as the lower 16 bits of the address
GPCVSR0
720-565-5995 | info@solusys.com | www.solusys.com
Diagnostic Facilities
GPCSR1
3
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