Programming the 8085
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Tuesday, September 21, 2010
Square wave using 8255
4100 3E 80 LOOP: MVI A,80H 4102 D3 0F OUT 0FH 4104 3E FF MVI A,0FFH 4106 D3 0C OUT 0CH 4108 CD 16 41 CALL DELAY 410B 3E 00 MVI A,00H 410D D3 0C OUT 0CH 410F CD 16 41 CALL DELAY 4112 C3 00 41 JMP LOOP 4115 76 HLT 4116 06 30 DELAY: MVI B,30H 4118 05 WAIT: DCR B 4119 C2 18 41 JNZ WAIT 411C C9 RET
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