15 Status Polling Assembly Code Step 1b: Wait for DSR, CTS, and DCD movw $0x2fe, %dx# modem status loop1: inb (%dx), %al# get current andb $0xb0, %al# get 3 signals xorb $0xb0, %al# check all 3 jnz loop1# some missing # all 3 are on now
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