Motorola 700/800-Series 사용자 설명서
Multiprocessor Support
3-23
3
You can only program Flash memory by the MPCR method. Refer
to the .PFLASH system call in the Debugging Package for Motorola
68K CISC CPUs User's Manual for a description of the Flash memory
program control packet structure.
to the .PFLASH system call in the Debugging Package for Motorola
68K CISC CPUs User's Manual for a description of the Flash memory
program control packet structure.
The status codes that may be set by the bus master are:
The Multiprocessor Address Register (MPAR), located in shared
RAM location of $804 offset from the base address the debugger
loads it at, contains the second of two longwords used to control
communication between processors. The MPAR contents specify
the address at which execution for the remote processor is to begin
if the MPCR contains a G or B. The MPAR is organized as follows:
RAM location of $804 offset from the base address the debugger
loads it at, contains the second of two longwords used to control
communication between processors. The MPAR contents specify
the address at which execution for the remote processor is to begin
if the MPCR contains a G or B. The MPAR is organized as follows:
At power-up, the debug monitorÕs self-test routines initialize RAM,
including the memory locations used for multi-processor support
($800 through $807).
including the memory locations used for multi-processor support
($800 through $807).
The MPCR contains $00 at powerup, indicating that initialization is
not yet complete. As the initialization proceeds, the execution path
comes to the ÔÔpromptÕÕ routine. Before sending the prompt, this
routine places an R in the MPCR to indicate that initialization is
complete. Then the prompt is sent.
not yet complete. As the initialization proceeds, the execution path
comes to the ÔÔpromptÕÕ routine. Before sending the prompt, this
routine places an R in the MPCR to indicate that initialization is
complete. Then the prompt is sent.
If no terminal is connected to the port, the MPCR is still polled to
see whether an external processor requires control to be passed to
the dual-port RAM. If a terminal does respond, the MPCR is polled
for the same purpose while the serial port is being polled for user
input.
see whether an external processor requires control to be passed to
the dual-port RAM. If a terminal does respond, the MPCR is polled
for the same purpose while the serial port is being polled for user
input.
An ASCII G placed in the MPCR by a remote processor indicates
that the Go Direct type of transfer is requested. An ASCII B in the
MPCR indicates that breakpoints are to be armed before control is
transferred (as with the
that the Go Direct type of transfer is requested. An ASCII B in the
MPCR indicates that breakpoints are to be armed before control is
transferred (as with the
GO
command).
ASCII G (HEX 47) - Use Go Direct (GD) logic specifying the MPAR address.
ASCII B (HEX 42) - Install breakpoints using the Go (G) logic.
ASCII B (HEX 42) - Install breakpoints using the Go (G) logic.
$804
*
*
*
*
(MPAR)