I have some code called td.asm which assembles under gpasm and
produces td.cod and td.cod runs under gpsim so it is time, how,
to feed test signals using stimulus files.

	I shamelessly stole an example .stc file from the gpsim
distribution as it is much like what I need to do. Here it is
along with the original comments modified for this situation:

stimulus asynchronous_stimulus

# The initial state AND the state the stimulus is when
# it rolls over

initial_state 1
start_cycle 8000000

# the asynchronous stimulus will roll over in 'period'
# cycles. Delete this line if you don't want a roll over.

period 838
#419 cycles low then 419 high.

#Here's where things go wrong.
{ 419, 0,
  838, 1,=20
}
#gpsim chokes on the } as a syntax error.
# Give the stimulus a name:

name t1
t1 attached to rb0

	So far, I have tried:
gpsim -c td.stc
	I have also added=20

load td.cod

in to td.stc and it does so but it always hits those braces and
the party is over.

	I am actually trying to simulate a square wave signal on
RB0 so the numbers in the braces represent one cycle.

	Is there a better way to produce several thousand cycles
of the square wave such that it just loops until done?
	If I run gpsim td.cod, it lets me step through the
program and things look reasonable so the system appears to be
sane.

	As always, thank you.

Martin McCormick WB5AGZ
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