Digital Sim tool 7-segment displays simultaneous addressing

[javierMaciasGMAIL]

Hi. Why is it possible to address the 7-segment displays one by one, but not in a single instruction? Is this a bug, a "limitation", or the desired behavior? Example code:

#-- 7-segment display test
	.data
	.eqv DISP_R 0xFFFF0010       # right display address (+1=> left display)
	.eqv ON_ONE_DISPLAY 0xFF     # all segments on, one display
	.eqv ON_TWO_DISPLAYS 0xFFFF  # all segments on, two displays

	.text
	li s0, DISP_R
	li t0, ON_ONE_DISPLAY
	li t1, ON_TWO_DISPLAYS

	sb t0, 0(s0)   #ok ON right display
	sb zero, 0(s0)  #OFF right disylay
	sb t0, 1(s0)   #ok ON left display
	sb zero, 1(s0) #OFF left right disylay

	sw t1, 0(s0)   #only ON right display!

stop:   b stop

Thank you.