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+--------+-------------------------+-------------------------+--------+--------+
|00000000| 00 1a 44 56 31 31 20 4f | 70 65 6e 69 6e 67 20 53 |..DV11 O|pening S|
|00000010| 65 72 69 61 6c 20 44 72 | 69 76 65 72 00 00 00 00 |erial Dr|iver....|
|00000020| 00 00 00 00 00 00 00 00 | 00 00 00 00 00 00 00 00 |........|........|
|00000030| 00 00 00 00 00 00 00 00 | 00 00 00 00 00 00 00 00 |........|........|
|00000040| 00 4f 4e 4c 4e 48 4c 58 | 32 01 00 00 00 00 00 00 |.ONLNHLX|2.......|
|00000050| 00 00 00 00 00 25 ea 00 | 00 05 27 aa b1 d6 66 aa |.....%..|..'...f.|
|00000060| d1 b0 c0 00 00 00 00 00 | 00 00 00 00 00 00 00 00 |........|........|
|00000070| 00 00 00 00 00 00 00 00 | 00 00 81 81 15 21 00 00 |........|.....!..|
|00000080| 44 56 20 31 31 20 2d 20 | 4f 70 65 6e 69 6e 67 20 |DV 11 - |Opening |
|00000090| 74 68 65 20 53 65 72 69 | 61 6c 20 44 72 69 76 65 |the Seri|al Drive|
|000000a0| 72 0d 44 65 76 69 63 65 | 73 09 0d 52 65 76 69 73 |r.Device|s..Revis|
|000000b0| 65 64 20 62 79 3a 09 53 | 72 69 72 61 6d 20 53 75 |ed by:.S|riram Su|
|000000c0| 62 72 61 6d 61 6e 69 61 | 6e 09 44 65 63 65 6d 62 |bramania|n.Decemb|
|000000d0| 65 72 20 31 39 38 39 0d | 57 72 69 74 74 65 6e 20 |er 1989.|Written |
|000000e0| 62 79 3a 09 53 72 69 72 | 61 6d 20 53 75 62 72 61 |by:.Srir|am Subra|
|000000f0| 6d 61 6e 69 61 6e 09 41 | 75 67 75 73 74 20 31 39 |manian.A|ugust 19|
|00000100| 38 39 0d 54 68 69 73 20 | 54 65 63 68 6e 69 63 61 |89.This |Technica|
|00000110| 6c 20 4e 6f 74 65 20 64 | 65 73 63 72 69 62 65 73 |l Note d|escribes|
|00000120| 20 74 68 65 20 72 65 63 | 6f 6d 6d 65 6e 64 65 64 | the rec|ommended|
|00000130| 2c 20 73 61 66 65 2c 20 | 61 6e 64 20 63 6f 6d 70 |, safe, |and comp|
|00000140| 61 74 69 62 6c 65 20 77 | 61 79 20 74 6f 20 6f 70 |atible w|ay to op|
|00000150| 65 6e 20 74 68 65 20 4d | 61 63 69 6e 74 6f 73 68 |en the M|acintosh|
|00000160| 20 73 65 72 69 61 6c 20 | 64 72 69 76 65 72 2c 20 | serial |driver, |
|00000170| 61 6e 64 20 69 74 20 65 | 78 70 6c 61 69 6e 73 20 |and it e|xplains |
|00000180| 77 68 79 20 79 6f 75 20 | 73 68 6f 75 6c 64 20 6e |why you |should n|
|00000190| 6f 20 6c 6f 6e 67 65 72 | 20 63 68 65 63 6b 20 66 |o longer| check f|
|000001a0| 6f 72 20 70 6f 72 74 20 | 61 76 61 69 6c 61 62 69 |or port |availabi|
|000001b0| 6c 69 74 79 2e 0d 43 68 | 61 6e 67 65 73 20 73 69 |lity..Ch|anges si|
|000001c0| 6e 63 65 20 4f 63 74 6f | 62 65 72 20 31 39 38 39 |nce Octo|ber 1989|
|000001d0| 3a 20 20 43 6f 72 72 65 | 63 74 65 64 20 73 79 6e |:  Corre|cted syn|
|000001e0| 74 61 78 20 65 72 72 6f | 72 73 20 69 6e 20 74 68 |tax erro|rs in th|
|000001f0| 65 20 73 61 6d 70 6c 65 | 20 63 6f 64 65 2e 0d 53 |e sample| code..S|
|00000200| 74 61 72 74 69 6e 67 20 | 77 69 74 68 20 74 68 65 |tarting |with the|
|00000210| 20 31 32 38 4b 20 52 4f | 4d 2c 20 77 65 20 72 65 | 128K RO|M, we re|
|00000220| 63 6f 6d 6d 65 6e 64 20 | 74 68 61 74 20 61 70 70 |commend |that app|
|00000230| 6c 69 63 61 74 69 6f 6e | 73 20 64 6f 20 6e 6f 74 |lication|s do not|
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|00000260| 43 6f 6e 66 69 67 2c 20 | 50 6f 72 74 41 55 73 65 |Config, |PortAUse|
|00000270| 2c 20 61 6e 64 20 50 6f | 72 74 42 55 73 65 20 62 |, and Po|rtBUse b|
|00000280| 65 66 6f 72 65 20 6f 70 | 65 6e 69 6e 67 20 74 68 |efore op|ening th|
|00000290| 65 20 73 65 72 69 61 6c | 20 64 72 69 76 65 72 2e |e serial| driver.|
|000002a0| 20 20 49 74 20 69 73 20 | 6e 6f 20 6c 6f 6e 67 65 |  It is |no longe|
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|000002e0| 68 65 20 61 76 61 69 6c | 61 62 69 6c 69 74 79 20 |he avail|ability |
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|00000340| 74 68 65 20 70 72 69 6e | 74 65 72 20 70 6f 72 74 |the prin|ter port|
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|00000370| 63 61 74 69 6f 6e 20 77 | 68 69 6c 65 20 41 70 70 |cation w|hile App|
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|000003d0| 6c 6b 2e 0d 54 68 65 20 | 73 65 72 69 61 6c 20 64 |lk..The |serial d|
|000003e0| 72 69 76 65 72 20 61 75 | 74 6f 6d 61 74 69 63 61 |river au|tomatica|
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|00000400| 74 20 74 68 65 20 73 65 | 72 69 61 6c 20 70 6f 72 |t the se|rial por|
|00000410| 74 20 69 73 20 63 6f 72 | 72 65 63 74 6c 79 20 63 |t is cor|rectly c|
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|00000460| 65 63 74 6c 79 20 63 6f | 6e 66 69 67 75 72 65 64 |ectly co|nfigured|
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|000004c0| 65 2e 20 20 54 68 65 20 | 73 65 72 69 61 6c 20 64 |e.  The |serial d|
|000004d0| 72 69 76 65 72 20 61 6c | 72 65 61 64 79 20 68 61 |river al|ready ha|
|000004e0| 73 20 61 6c 6c 20 74 68 | 65 20 63 6f 64 65 20 62 |s all th|e code b|
|000004f0| 75 69 6c 74 20 69 6e 74 | 6f 20 69 74 20 66 6f 72 |uilt int|o it for|
|00000500| 20 74 65 73 74 69 6e 67 | 20 74 68 65 20 61 76 61 | testing| the ava|
|00000510| 69 6c 61 62 69 6c 69 74 | 79 20 6f 66 20 74 68 65 |ilabilit|y of the|
|00000520| 20 73 65 72 69 61 6c 20 | 70 6f 72 74 73 20 62 65 | serial |ports be|
|00000530| 66 6f 72 65 20 74 72 79 | 69 6e 67 20 74 6f 20 63 |fore try|ing to c|
|00000540| 6f 6d 70 6c 65 74 65 20 | 74 68 65 20 5f 4f 70 65 |omplete |the _Ope|
|00000550| 6e 20 63 61 6c 6c 2e 20 | 20 54 68 65 72 65 66 6f |n call. | Therefo|
|00000560| 72 65 2c 20 73 69 6e 63 | 65 20 61 6c 6c 20 6f 66 |re, sinc|e all of|
|00000570| 20 74 68 65 20 72 65 71 | 75 69 72 65 64 20 63 68 | the req|uired ch|
|00000580| 65 63 6b 73 20 61 72 65 | 20 6d 61 64 65 20 69 6e |ecks are| made in|
|00000590| 73 69 64 65 20 74 68 65 | 20 64 72 69 76 65 72 20 |side the| driver |
|000005a0| 69 74 73 65 6c 66 2c 20 | 77 65 20 72 65 63 6f 6d |itself, |we recom|
|000005b0| 6d 65 6e 64 20 74 68 61 | 74 20 61 20 73 69 6d 70 |mend tha|t a simp|
|000005c0| 6c 65 20 4f 70 65 6e 44 | 72 69 76 65 72 20 63 61 |le OpenD|river ca|
|000005d0| 6c 6c 20 62 65 20 6d 61 | 64 65 20 77 68 65 6e 20 |ll be ma|de when |
|000005e0| 79 6f 75 20 6e 65 65 64 | 20 74 6f 20 75 73 65 20 |you need| to use |
|000005f0| 61 20 73 65 72 69 61 6c | 20 70 6f 72 74 2e 0d 42 |a serial| port..B|
|00000600| 79 20 75 73 69 6e 67 20 | 6a 75 73 74 20 74 68 65 |y using |just the|
|00000610| 20 4f 70 65 6e 44 72 69 | 76 65 72 20 63 61 6c 6c | OpenDri|ver call|
|00000620| 20 74 6f 20 74 68 65 20 | 73 65 72 69 61 6c 20 64 | to the |serial d|
|00000630| 72 69 76 65 72 2c 20 79 | 6f 75 20 65 6e 73 75 72 |river, y|ou ensur|
|00000640| 65 20 74 68 61 74 20 79 | 6f 75 72 20 63 6f 64 65 |e that y|our code|
|00000650| 20 69 73 20 62 6f 74 68 | 20 75 73 65 72 2d 66 72 | is both| user-fr|
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|00000680| 65 20 76 65 72 73 69 6f | 6e 73 20 6f 66 20 74 68 |e versio|ns of th|
|00000690| 65 20 53 79 73 74 65 6d | 20 53 6f 66 74 77 61 72 |e System| Softwar|
|000006a0| 65 2e 0d 50 61 73 63 61 | 6c 0d 72 65 73 75 6c 74 |e..Pasca|l.result|
|000006b0| 20 3a 3d 20 4f 70 65 6e | 44 72 69 76 65 72 28 27 | := Open|Driver('|
|000006c0| 2e 41 4f 75 74 27 2c 41 | 6f 75 74 52 65 66 4e 75 |.AOut',A|outRefNu|
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|000006f0| 20 72 65 61 6c 20 09 09 | 09 09 09 09 09 20 20 20 | real ..|.....   |
|00000700| 20 61 70 70 6c 69 63 61 | 74 69 6f 6e 2e 20 7d 0d | applica|tion. }.|
|00000710| 72 65 73 75 6c 74 20 3a | 3d 20 4f 70 65 6e 44 72 |result :|= OpenDr|
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|00000740| 65 65 20 66 61 69 6c 75 | 72 65 20 6d 65 63 68 61 |ee failu|re mecha|
|00000750| 6e 69 73 6d 20 69 6e 20 | 53 61 6d 70 6c 65 20 43 |nism in |Sample C|
|00000760| 6f 64 65 2e 20 20 20 20 | 20 7d 0d 43 0d 72 65 73 |ode.    | }.C.res|
|00000770| 75 6c 74 20 3d 20 4f 70 | 65 6e 44 72 69 76 65 72 |ult = Op|enDriver|
|00000780| 28 22 5c 70 2e 41 4f 75 | 74 22 2c 26 41 6f 75 74 |("\p.AOu|t",&Aout|
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|000007d0| 65 73 75 6c 74 20 3d 20 | 4f 70 65 6e 44 72 69 76 |esult = |OpenDriv|
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|00000800| 53 65 65 20 66 61 69 6c | 75 72 65 20 6d 65 63 68 |See fail|ure mech|
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|00000820| 09 09 09 09 09 09 20 20 | 20 20 20 20 43 6f 64 65 |......  |    Code|
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|00000850| 62 69 6c 69 74 79 20 77 | 69 74 68 20 74 68 65 20 |bility w|ith the |
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|00000890| 4d 53 44 4f 70 65 6e 20 | 66 6f 72 20 74 68 65 20 |MSDOpen |for the |
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|000009d0| 00 64 00 0c 57 4f 52 44 | 00 00 00 00 00 53 01 ca |.d..WORD|.....S..|
|000009e0| 00 a0 00 8c 00 a1 00 64 | 00 0c 57 4f 52 44 00 00 |.......d|..WORD..|
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|00000a00| 00 2f 00 5a 00 81 02 23 | 00 07 00 00 00 00 00 08 |./.Z...#|........|
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|00000a30| 00 00 00 a0 00 c4 00 a1 | 00 64 00 0a 4f 4e 4c 4e |........|.d..ONLN|
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|00000e40| 00 00 00 00 00 a1 00 64 | 00 34 64 72 77 32 00 3a |.......d|.4drw2.:|
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+--------+-------------------------+-------------------------+--------+--------+