00000000: 22 D7 48 41 54 20 49 53 20 54 48 45 20 4F 50 45 |".HAT IS THE OPE|
00000010: 52 41 54 49 4F 4E 20 20 4F 46 20 20 54 48 45 20 |RATION OF THE |
00000020: 20 CF 50 43 4F 44 45 0D 22 C3 CC C9 3F 0D 22 31 | .PCODE."...?."1|
00000030: 29 20 20 D4 48 45 20 49 4E 54 45 52 55 50 54 20 |) .HE INTERUPT |
00000040: 44 49 53 41 42 4C 45 20 46 4C 41 47 20 20 49 53 |DISABLE FLAG IS|
00000050: 20 20 53 45 54 0D 22 54 4F 20 31 2E 20 20 C6 52 | SET."TO 1. .R|
00000060: 4F 4D 20 4E 4F 57 20 4F 4E 2C 20 49 4E 54 45 52 |OM NOW ON, INTER|
00000070: 55 50 54 53 20 57 49 4C 4C 20 20 42 45 0D 22 50 |UPTS WILL BE."P|
00000080: 52 4F 43 45 53 53 45 44 20 42 59 20 54 48 45 20 |ROCESSED BY THE |
00000090: 53 59 53 54 45 4D 2C 20 55 53 49 4E 47 20 54 48 |SYSTEM, USING TH|
000000A0: 45 20 C9 D2 D1 0D 22 56 45 43 54 4F 52 20 49 4E |E ...."VECTOR IN|
000000B0: 20 28 24 C6 C6 C6 C5 29 2E 0D 22 0D 22 32 29 20 | ($....).."."2) |
000000C0: 20 D4 48 45 20 49 4E 54 45 52 55 50 54 20 44 49 | .HE INTERUPT DI|
000000D0: 53 41 42 4C 45 20 46 4C 41 47 20 20 49 53 20 20 |SABLE FLAG IS |
000000E0: 53 45 54 0D 22 54 4F 20 30 2E 20 20 C6 52 4F 4D |SET."TO 0. .ROM|
000000F0: 20 4E 4F 57 20 4F 4E 2C 20 49 4E 54 45 52 55 50 | NOW ON, INTERUP|
00000100: 54 53 20 57 49 4C 4C 20 20 42 45 0D 22 50 52 4F |TS WILL BE."PRO|
00000110: 43 45 53 53 45 44 20 42 59 20 54 48 45 20 53 59 |CESSED BY THE SY|
00000120: 53 54 45 4D 2C 20 55 53 49 4E 47 20 54 48 45 20 |STEM, USING THE |
00000130: C9 D2 D1 0D 22 56 45 43 54 4F 52 20 49 4E 20 28 |...."VECTOR IN (|
00000140: 24 C6 C6 C6 C5 29 2E 0D 22 0D 22 33 29 20 20 D4 |$....).."."3) .|
00000150: 48 45 20 49 4E 54 45 52 55 50 54 20 44 49 53 41 |HE INTERUPT DISA|
00000160: 42 4C 45 20 46 4C 41 47 20 20 49 53 20 20 53 45 |BLE FLAG IS SE|
00000170: 54 0D 22 54 4F 20 31 2E 20 20 C6 52 4F 4D 20 4E |T."TO 1. .ROM N|
00000180: 4F 57 20 4F 4E 2C 20 49 4E 54 45 52 55 50 54 53 |OW ON, INTERUPTS|
00000190: 20 57 49 4C 4C 20 20 42 45 0D 22 50 52 4F 43 45 | WILL BE."PROCE|
000001A0: 53 53 45 44 20 42 59 20 54 48 45 20 53 59 53 54 |SSED BY THE SYST|
000001B0: 45 4D 2C 20 55 53 49 4E 47 20 54 48 45 20 C2 CE |EM, USING THE ..|
000001C0: C5 0D 22 56 45 43 54 4F 52 20 49 4E 20 28 24 C6 |.."VECTOR IN ($.|
000001D0: C6 C5 34 29 2E 0D 22 0D 22 34 29 20 20 D4 48 45 |..4).."."4) .HE|
000001E0: 20 49 4E 54 45 52 55 50 54 20 44 49 53 41 42 4C | INTERUPT DISABL|
000001F0: 45 20 46 4C 41 47 20 20 49 53 20 20 53 45 54 0D |E FLAG IS SET.|
00000200: 22 54 4F 20 30 2E 20 20 CE 45 56 45 52 20 41 47 |"TO 0. .EVER AG|
00000210: 41 49 4E 20 53 48 41 4C 4C 20 49 4E 54 45 52 55 |AIN SHALL INTERU|
00000220: 50 54 53 20 20 42 45 0D 22 50 52 4F 43 45 53 53 |PTS BE."PROCESS|
00000230: 45 44 20 42 59 20 54 48 45 20 53 59 53 54 45 4D |ED BY THE SYSTEM|
00000240: 2C 20 55 53 49 4E 47 20 54 48 45 20 C9 D2 D1 0D |, USING THE ....|
00000250: 22 56 45 43 54 4F 52 20 49 4E 20 28 24 C6 C6 C6 |"VECTOR IN ($...|
00000260: 31 29 2E 0D 22 0D 22 35 29 20 20 CE 4F 4E 45 20 |1).."."5) .ONE |
00000270: 4F 46 20 54 48 45 20 41 42 4F 56 45 2E 0D 22 0D |OF THE ABOVE..".|
00000280: 22 40 0D 22 32 0D 22 5A 5A 5A 5A 5A 0D 0D 80 0D |"@."2."ZZZZZ....|
00000290: 0A |. |
"WHAT IS THE OPERATION OF THE OPCODE.
"CLI?."1) THE INTERUPT DISABLE FLAG IS
SET."TO 1. FROM NOW ON, INTERUPTS WIL
L BE."PROCESSED BY THE SYSTEM, USING TH
E IRQ."VECTOR IN ($FFFE).."."2) THE INT
ERUPT DISABLE FLAG IS SET."TO 0. FROM
NOW ON, INTERUPTS WILL BE."PROCESSED B
Y THE SYSTEM, USING THE IRQ."VECTOR IN (
$FFFE).."."3) THE INTERUPT DISABLE FLAG
IS SET."TO 1. FROM NOW ON, INTERUPTS
WILL BE."PROCESSED BY THE SYSTEM, USIN
G THE BNE."VECTOR IN ($FFE4).."."4) THE
INTERUPT DISABLE FLAG IS SET."TO 0.
NEVER AGAIN SHALL INTERUPTS BE."PROCESS
ED BY THE SYSTEM, USING THE IRQ."VECTOR
IN ($FFF1).."."5) NONE OF THE ABOVE..".
"@."2."ZZZZZ.....
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