On 2008-09-09, Timothy Normand Miller wrote:
> I'm going to be checking in a bunch of code updates on like Thursday.
> This should be a good working version of OGA. The next thing I'd like
> to do is some simulations of HQ code. Where are we with that? I'd
> like to get the stub in and working first in simulation then in the
> real hardware. Then we can start adding VGA stuff. But to really
> test that, we'll need the BIOS. Things are coming together!
If we want to attach the debugger:
I added two options to oga1hqsim which allows specifying where in the
RTL to find the instances of the HQ module and the helper module. The
command line is
oga1hqsim \
--hdlsim=COMPILED_IVERILOG_SIMULATOR \
--hq-instance=LOCATION.OF.HQ \
--helper-instance=LOCATION.OF.HELPER \
INPUT_FILE.hex
That leaves integrating the helper tools/oga1hq/oga1hq_hdlsim.v with the
full RTL. The functions of the helper is to
* upload an initial program file to HQ,
* to print out various thing,
* to call $hsip_signal() to wake up the debugger, and
* to call $finish().
The main issue is that it makes references to the HQ instance, which at
the moment is directly instantiated into the helper. When you have
time, you could have a look at oga1hq_hdlsim.v and see if you have an
idea what is the best approach.
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