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Simple BSP for the TX3904 simulator built into gdb.
Simulator Invocation
====================
The following is how the simulator is invoked.
target sim --board=jmr3904
GDB must be configured with a target like "tx39-rtems". Otherwise,
the simulator will not be built for the correct instruction
and peripheral set.
Simulator Information
=====================
The simulated system clock counts instructions. Setting the clock
source to "clock" and the divider to 1 results in the timer directly
counting the number of instructions executed.
Status
======
+ hello.exe locks up while running the global destructors. This almost
has to be a linkcmds issue.
+ Workaround: bspclean.c actually explicits invokes _sys_exit() BEFORE
letting the global destructors run.
+ There is a clock tick device driver which has not been calibrated.
+ There is no timer device driver.
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