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+--------+-------------------------+-------------------------+--------+--------+
|00000000| 00 1f 46 72 61 6d 65 77 | 6f 72 6b 20 4e 43 52 20 |..Framew|ork NCR |
|00000010| 53 61 6d 70 6c 65 20 44 | 69 73 63 75 73 73 69 6f |Sample D|iscussio|
|00000020| 6e 00 00 00 00 00 00 00 | 00 00 00 00 00 00 00 00 |n.......|........|
|00000030| 00 00 00 00 00 00 00 00 | 00 00 00 00 00 00 00 00 |........|........|
|00000040| 00 54 45 58 54 74 74 78 | 74 01 00 00 00 00 00 00 |.TEXTttx|t.......|
|00000050| 00 00 00 00 00 24 3d 00 | 00 01 f0 ac 39 c2 60 ac |.....$=.|....9.`.|
|00000060| 39 c2 60 00 00 00 00 00 | 00 00 00 00 00 00 00 00 |9.`.....|........|
|00000070| 00 00 00 00 00 00 00 00 | 00 00 81 81 7c e8 00 00 |........|....|...|
|00000080| 41 20 53 61 6d 70 6c 65 | 20 44 65 76 69 63 65 20 |A Sample| Device |
|00000090| 44 72 69 76 65 72 0d 66 | 6f 72 20 74 68 65 20 4e |Driver.f|or the N|
|000000a0| 65 77 20 44 65 76 69 63 | 65 20 44 72 69 76 65 72 |ew Devic|e Driver|
|000000b0| 20 46 72 61 6d 65 77 6f | 72 6b 0d 0d 4d 61 72 74 | Framewo|rk..Mart|
|000000c0| 69 6e 20 4d 69 6e 6f 77 | 0d 44 65 63 65 6d 62 65 |in Minow|.Decembe|
|000000d0| 72 20 32 33 2c 20 31 39 | 39 34 20 28 69 6e 20 70 |r 23, 19|94 (in p|
|000000e0| 72 6f 67 72 65 73 73 29 | 0d 3d 3d 3d 3d 3d 3d 3d |rogress)|.=======|
|000000f0| 3d 3d 3d 3d 3d 3d 3d 3d | 3d 3d 3d 3d 3d 3d 3d 3d |========|========|
|00000100| 3d 3d 3d 3d 3d 3d 3d 3d | 3d 3d 3d 3d 3d 3d 3d 3d |========|========|
|00000110| 3d 3d 3d 3d 3d 3d 3d 3d | 3d 3d 3d 3d 3d 3d 3d 3d |========|========|
|00000120| 3d 3d 3d 3d 3d 3d 3d 3d | 3d 3d 3d 3d 3d 3d 3d 3d |========|========|
|00000130| 3d 3d 3d 3d 0d 0d 49 6e | 74 72 6f 64 75 63 74 69 |====..In|troducti|
|00000140| 6f 6e 0d 7e 7e 7e 7e 7e | 7e 7e 7e 7e 7e 0d 54 68 |on.~~~~~|~~~~~.Th|
|00000150| 69 73 20 69 73 20 61 20 | 73 61 6d 70 6c 65 20 64 |is is a |sample d|
|00000160| 65 76 69 63 65 20 64 72 | 69 76 65 72 20 74 68 61 |evice dr|iver tha|
|00000170| 74 20 69 6c 6c 75 73 74 | 72 61 74 65 73 20 74 68 |t illust|rates th|
|00000180| 65 20 6e 65 77 20 64 72 | 69 76 65 72 20 61 72 63 |e new dr|iver arc|
|00000190| 68 69 74 65 63 74 75 72 | 65 20 74 68 61 74 0d 77 |hitectur|e that.w|
|000001a0| 69 6c 6c 20 62 65 63 6f | 6d 65 20 61 76 61 69 6c |ill beco|me avail|
|000001b0| 61 62 6c 65 20 77 69 74 | 68 20 74 68 65 20 50 6f |able wit|h the Po|
|000001c0| 77 65 72 20 4d 61 63 69 | 6e 74 6f 73 68 20 6d 6f |wer Maci|ntosh mo|
|000001d0| 64 65 6c 73 20 74 68 61 | 74 20 73 75 70 70 6f 72 |dels tha|t suppor|
|000001e0| 74 20 50 43 49 20 62 75 | 73 2e 20 54 68 65 0d 64 |t PCI bu|s. The.d|
|000001f0| 72 69 76 65 72 20 61 72 | 63 68 69 74 65 63 74 75 |river ar|chitectu|
|00000200| 72 65 20 77 69 6c 6c 20 | 62 65 20 75 73 65 64 20 |re will |be used |
|00000210| 6f 6e 20 66 75 74 75 72 | 65 20 4d 61 63 69 6e 74 |on futur|e Macint|
|00000220| 6f 73 68 20 6f 70 65 72 | 61 74 69 6e 67 20 73 79 |osh oper|ating sy|
|00000230| 73 74 65 6d 20 72 65 6c | 65 61 73 65 73 0d 66 6f |stem rel|eases.fo|
|00000240| 72 20 50 6f 77 65 72 20 | 50 43 20 61 6e 64 20 36 |r Power |PC and 6|
|00000250| 38 30 30 30 20 6d 61 63 | 68 69 6e 65 73 2e 20 54 |8000 mac|hines. T|
|00000260| 68 65 20 73 61 6d 70 6c | 65 20 68 61 73 20 74 68 |he sampl|e has th|
|00000270| 65 20 66 6f 6c 6c 6f 77 | 69 6e 67 20 63 68 61 72 |e follow|ing char|
|00000280| 61 63 74 65 72 69 73 74 | 69 63 73 3a 0d a5 09 53 |acterist|ics:...S|
|00000290| 6d 61 6c 6c 3a 20 6d 6f | 73 74 20 6f 66 20 74 68 |mall: mo|st of th|
|000002a0| 65 20 63 6f 64 65 20 69 | 73 20 d2 61 64 6d 69 6e |e code i|s .admin|
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|000002c0| 6f 73 74 20 61 6c 6c 20 | 63 6f 64 65 20 74 68 61 |ost all |code tha|
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|000002f0| 68 61 72 64 77 61 72 65 | 20 69 73 20 69 73 6f 6c |hardware| is isol|
|00000300| 61 74 65 64 20 69 6e 74 | 6f 20 61 20 66 65 77 20 |ated int|o a few |
|00000310| 73 75 62 72 6f 75 74 69 | 6e 65 73 2e 0d a5 09 43 |subrouti|nes....C|
|00000320| 6f 6d 70 6c 65 74 65 3a | 20 74 68 65 20 73 61 6d |omplete:| the sam|
|00000330| 70 6c 65 20 63 72 65 61 | 74 65 73 20 61 6e 20 61 |ple crea|tes an a|
|00000340| 73 79 6e 63 68 72 6f 6e | 6f 75 73 20 64 65 76 69 |synchron|ous devi|
|00000350| 63 65 20 64 72 69 76 65 | 72 20 74 68 61 74 20 73 |ce drive|r that s|
|00000360| 75 70 70 6f 72 74 73 20 | 74 68 65 0d 4e 43 52 20 |upports |the.NCR |
|00000370| 38 32 35 30 20 69 6e 74 | 65 72 66 61 63 65 20 63 |8250 int|erface c|
|00000380| 61 72 64 20 74 68 61 74 | 20 75 73 65 73 20 74 68 |ard that| uses th|
|00000390| 65 20 4e 43 52 35 33 43 | 38 32 35 20 50 43 49 20 |e NCR53C|825 PCI |
|000003a0| 62 75 73 20 69 6e 74 65 | 72 66 61 63 65 2e 0d a5 |bus inte|rface...|
|000003b0| 09 56 65 6e 64 6f 72 2d | 6e 65 75 74 72 61 6c 3a |.Vendor-|neutral:|
|000003c0| 20 74 68 65 20 64 72 69 | 76 65 72 20 61 6e 64 20 | the dri|ver and |
|000003d0| 69 74 73 20 66 72 61 6d | 65 77 6f 72 6b 20 6d 61 |its fram|ework ma|
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|00000400| 6f 64 65 20 57 61 72 72 | 69 6f 72 20 31 2e 32 20 |ode Warr|ior 1.2 |
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|00000430| 69 74 61 74 65 73 20 62 | 75 69 6c 64 69 6e 67 0d |itates b|uilding.|
|00000440| 6d 75 6c 74 69 70 6c 65 | 20 69 6e 73 74 61 6e 63 |multiple| instanc|
|00000450| 65 73 2e 20 5b 54 68 65 | 20 41 70 70 6c 65 53 63 |es. [The| AppleSc|
|00000460| 72 69 70 74 20 69 73 20 | 6e 6f 74 20 69 6d 70 6c |ript is |not impl|
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|00000490| 20 75 6e 64 65 72 20 4d | 65 74 72 6f 57 65 72 6b | under M|etroWerk|
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|000004d0| 20 54 68 69 6e 6b 20 43 | 2c 0d 61 6c 74 68 6f 75 | Think C|,.althou|
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|00000510| 74 20 70 72 6f 67 72 61 | 6d 20 68 61 73 20 6f 6e |t progra|m has on|
|00000520| 6c 79 20 62 65 65 6e 0d | 63 6f 6d 70 69 6c 65 64 |ly been.|compiled|
|00000530| 20 62 79 20 4d 65 74 72 | 6f 57 65 72 6b 73 2e 0d | by Metr|oWerks..|
|00000540| 0d 47 6f 61 6c 73 0d 7e | 7e 7e 7e 7e 0d a5 09 41 |.Goals.~|~~~~...A|
|00000550| 20 77 6f 72 6b 69 6e 67 | 20 64 65 76 69 63 65 20 | working| device |
|00000560| 64 72 69 76 65 72 20 73 | 61 6d 70 6c 65 20 66 6f |driver s|ample fo|
|00000570| 72 20 74 68 65 20 4e 65 | 77 20 44 65 76 69 63 65 |r the Ne|w Device|
|00000580| 20 4d 61 6e 61 67 65 72 | 20 61 72 63 68 69 74 65 | Manager| archite|
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|000005c0| 6e 64 20 6d 61 6e 79 20 | 6f 66 20 74 68 65 20 6e |nd many |of the n|
|000005d0| 65 77 20 6d 61 6e 61 67 | 65 72 73 2c 20 61 6e 64 |ew manag|ers, and|
|000005e0| 0d a5 09 66 6f 6c 6c 6f | 77 73 20 74 68 65 20 64 |...follo|ws the d|
|000005f0| 65 76 69 63 65 20 64 72 | 69 76 65 72 20 6d 6f 64 |evice dr|iver mod|
|00000600| 65 6c 20 74 68 61 74 20 | 77 69 6c 6c 20 62 65 20 |el that |will be |
|00000610| 75 73 65 64 20 69 6e 20 | 66 75 74 75 72 65 20 4d |used in |future M|
|00000620| 61 63 69 6e 74 6f 73 68 | 20 73 79 73 74 65 6d 73 |acintosh| systems|
|00000630| 2e 0d 0d 4e 6f 6e 2d 47 | 6f 61 6c 73 0d 7e 7e 7e |...Non-G|oals.~~~|
|00000640| 7e 7e 7e 7e 7e 0d a5 09 | 43 6f 6e 63 75 72 72 65 |~~~~~...|Concurre|
|00000650| 6e 63 65 3a 20 28 69 2e | 65 2e 20 63 61 70 61 62 |nce: (i.|e. capab|
|00000660| 6c 65 20 6f 66 20 70 72 | 6f 63 65 73 73 69 6e 67 |le of pr|ocessing|
|00000670| 20 6d 6f 72 65 20 74 68 | 61 6e 20 6f 6e 65 20 73 | more th|an one s|
|00000680| 69 6d 75 6c 74 61 6e 65 | 6f 75 73 0d 6f 70 65 72 |imultane|ous.oper|
|00000690| 61 74 69 6f 6e 73 29 2e | 20 54 68 69 73 20 77 6f |ations).| This wo|
|000006a0| 75 6c 64 20 72 65 71 75 | 69 72 65 20 61 20 67 72 |uld requ|ire a gr|
|000006b0| 65 61 74 20 64 65 61 6c | 20 6f 66 20 4e 43 52 35 |eat deal| of NCR5|
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|000006d0| 72 6f 67 72 61 6d 6d 69 | 6e 67 2e 0d a5 09 46 75 |rogrammi|ng....Fu|
|000006e0| 6c 6c 2d 73 63 61 6c 65 | 3a 20 74 68 69 73 20 64 |ll-scale|: this d|
|000006f0| 72 69 76 65 72 20 69 6c | 6c 75 73 74 72 61 74 65 |river il|lustrate|
|00000700| 73 20 74 68 65 20 6e 65 | 77 20 64 72 69 76 65 72 |s the ne|w driver|
|00000710| 20 61 72 63 68 69 74 65 | 63 74 75 72 65 3a 20 69 | archite|cture: i|
|00000720| 74 20 64 6f 65 73 0d 6e | 6f 74 20 69 6c 6c 75 73 |t does.n|ot illus|
|00000730| 74 72 61 74 65 20 61 6c | 6c 20 63 61 70 61 62 69 |trate al|l capabi|
|00000740| 6c 69 74 69 65 73 20 6f | 66 20 74 68 65 20 6e 65 |lities o|f the ne|
|00000750| 77 20 6d 6f 64 65 6c 2e | 0d a5 09 54 68 69 73 20 |w model.|...This |
|00000760| 69 73 20 6e 6f 74 20 61 | 20 53 43 53 49 20 73 61 |is not a| SCSI sa|
|00000770| 6d 70 6c 65 2e 54 68 65 | 20 62 6f 61 72 64 20 75 |mple.The| board u|
|00000780| 73 65 64 20 77 61 73 20 | 63 68 6f 73 65 6e 20 61 |sed was |chosen a|
|00000790| 73 20 61 73 20 61 20 72 | 65 61 64 69 6c 79 2d 61 |s as a r|eadily-a|
|000007a0| 76 61 69 6c 61 62 6c 65 | 0d 68 61 72 64 77 61 72 |vailable|.hardwar|
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|000007c0| 72 69 76 65 72 20 73 68 | 6f 75 6c 64 20 6e 6f 74 |river sh|ould not|
|000007d0| 20 62 65 20 75 73 65 64 | 20 61 73 20 61 20 62 61 | be used| as a ba|
|000007e0| 73 69 73 20 66 6f 72 20 | 61 20 53 43 53 49 20 64 |sis for |a SCSI d|
|000007f0| 65 76 69 63 65 0d 64 72 | 69 76 65 72 20 28 6f 72 |evice.dr|iver (or|
|00000800| 20 53 49 4d 29 2e 20 49 | 6e 20 70 61 72 74 69 63 | SIM). I|n partic|
|00000810| 75 6c 61 72 2c 20 41 70 | 70 6c 65 20 72 65 63 6f |ular, Ap|ple reco|
|00000820| 6d 6d 65 6e 64 73 20 74 | 68 61 74 20 53 43 53 49 |mmends t|hat SCSI|
|00000830| 20 64 65 76 69 63 65 73 | 20 62 65 20 73 75 70 70 | devices| be supp|
|00000840| 6f 72 74 65 64 0d 62 79 | 20 64 65 76 69 63 65 20 |orted.by| device |
|00000850| 64 72 69 76 65 72 73 20 | 63 6f 6d 6d 75 6e 69 63 |drivers |communic|
|00000860| 61 74 69 6e 67 20 74 68 | 72 6f 75 67 68 20 74 68 |ating th|rough th|
|00000870| 65 20 53 43 53 49 20 4d | 61 6e 61 67 65 72 2c 20 |e SCSI M|anager, |
|00000880| 61 6e 64 20 74 68 61 74 | 20 53 43 53 49 20 62 75 |and that| SCSI bu|
|00000890| 73 0d 61 64 61 70 74 6f | 72 73 20 62 65 20 73 75 |s.adapto|rs be su|
|000008a0| 70 70 6f 72 74 65 64 20 | 62 79 20 53 49 4d 53 20 |pported |by SIMS |
|000008b0| 63 6f 6e 74 72 6f 6c 6c | 65 64 20 62 79 20 3d 20 |controll|ed by = |
|000008c0| 53 43 53 49 20 4d 61 6e | 61 67 65 72 20 34 2e 33 |SCSI Man|ager 4.3|
|000008d0| 2e 0d 0d 54 68 65 20 53 | 61 6d 70 6c 65 20 44 72 |...The S|ample Dr|
|000008e0| 69 76 65 72 0d 54 68 65 | 20 64 72 69 76 65 72 20 |iver.The| driver |
|000008f0| 61 6c 6c 6f 77 73 20 61 | 6e 20 61 70 70 6c 69 63 |allows a|n applic|
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|00000920| 61 6e 64 73 20 64 69 72 | 65 63 74 6c 79 20 74 6f |ands dir|ectly to|
|00000930| 20 74 68 65 20 4e 43 52 | 0d 64 65 76 69 63 65 2e | the NCR|.device.|
|00000940| 20 49 74 20 64 6f 65 73 | 20 6e 6f 74 20 73 75 70 | It does| not sup|
|00000950| 70 6f 72 74 20 72 65 61 | 64 2f 77 72 69 74 65 20 |port rea|d/write |
|00000960| 6f 72 20 d2 64 72 69 76 | 65 d3 20 70 72 6f 67 72 |or .driv|e. progr|
|00000970| 61 6d 6d 69 6e 67 20 28 | 69 2e 65 2e 20 69 74 20 |amming (|i.e. it |
|00000980| 64 6f 65 73 20 6e 6f 74 | 0d 61 6c 6c 6f 77 20 79 |does not|.allow y|
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|000009a0| 20 64 69 73 6b 73 29 2c | 20 62 75 74 20 72 61 74 | disks),| but rat|
|000009b0| 68 65 72 20 72 65 71 75 | 69 72 65 73 20 79 6f 75 |her requ|ires you|
|000009c0| 20 74 6f 20 69 73 73 75 | 65 20 63 6f 6d 6d 61 6e | to issu|e comman|
|000009d0| 64 73 0d 64 69 72 65 63 | 74 6c 79 2e 20 49 6e 20 |ds.direc|tly. In |
|000009e0| 74 68 69 73 20 72 65 67 | 61 72 64 2c 20 69 74 20 |this reg|ard, it |
|000009f0| 66 75 6e 63 74 69 6f 6e | 73 20 73 6f 6d 65 77 68 |function|s somewh|
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|00000a10| 20 4d 61 6e 61 67 65 72 | 2e 20 49 6e 0d 70 61 72 | Manager|. In.par|
|00000a20| 74 69 63 75 6c 61 72 2c | 20 69 74 0d a5 20 49 6c |ticular,| it.. Il|
|00000a30| 6c 75 73 74 72 61 74 65 | 73 20 50 72 69 6d 61 72 |lustrate|s Primar|
|00000a40| 79 20 49 6e 74 65 72 72 | 75 70 74 20 53 65 72 76 |y Interr|upt Serv|
|00000a50| 69 63 65 20 52 6f 75 74 | 69 6e 65 20 70 72 6f 63 |ice Rout|ine proc|
|00000a60| 65 73 73 69 6e 67 2e 0d | a5 20 49 6c 6c 75 73 74 |essing..|. Illust|
|00000a70| 72 61 74 65 73 20 61 73 | 79 6e 63 68 72 6f 6e 6f |rates as|ynchrono|
|00000a80| 75 73 20 49 2f 4f 20 70 | 72 6f 63 65 73 73 69 6e |us I/O p|rocessin|
|00000a90| 67 2e 0d a5 09 49 6c 6c | 75 73 74 72 61 74 65 73 |g....Ill|ustrates|
|00000aa0| 20 44 4d 41 2c 20 64 69 | 72 65 63 74 20 72 65 61 | DMA, di|rect rea|
|00000ab0| 64 2f 77 72 69 74 65 20 | 6f 66 20 64 65 76 69 63 |d/write |of devic|
|00000ac0| 65 20 72 65 67 69 73 74 | 65 72 73 2c 20 61 6e 64 |e regist|ers, and|
|00000ad0| 20 45 78 70 61 6e 73 69 | 6f 6e 20 42 75 73 0d 4d | Expansi|on Bus.M|
|00000ae0| 61 6e 61 67 65 72 20 70 | 72 6f 67 72 61 6d 6d 69 |anager p|rogrammi|
|00000af0| 6e 67 2e 0d a5 ca 49 6c | 6c 75 73 74 72 61 74 65 |ng....Il|lustrate|
|00000b00| 73 20 53 79 73 74 65 6d | 20 52 65 67 69 73 74 72 |s System| Registr|
|00000b10| 79 20 70 72 6f 63 65 73 | 73 69 6e 67 2e 0d 0d 4e |y proces|sing...N|
|00000b20| 65 77 20 44 65 76 69 63 | 65 20 44 72 69 76 65 72 |ew Devic|e Driver|
|00000b30| 20 41 72 63 68 69 74 65 | 63 74 75 72 65 0d 7e 7e | Archite|cture.~~|
|00000b40| 7e 7e 7e 7e 7e 7e 7e 7e | 7e 7e 7e 7e 7e 7e 7e 7e |~~~~~~~~|~~~~~~~~|
|00000b50| 7e 7e 7e 7e 7e 7e 7e 0d | 54 68 65 20 44 65 76 69 |~~~~~~~.|The Devi|
|00000b60| 63 65 20 4d 61 6e 61 67 | 65 72 20 77 69 6c 6c 20 |ce Manag|er will |
|00000b70| 62 65 20 72 65 70 6c 61 | 63 65 64 20 62 65 67 69 |be repla|ced begi|
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|00000b90| 43 49 20 6d 61 63 68 69 | 6e 65 73 2e 20 54 68 69 |CI machi|nes. Thi|
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|00000bb0| 69 76 65 72 d3 20 61 72 | 63 68 69 74 65 63 74 75 |iver. ar|chitectu|
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|00000c00| 6c 20 73 74 69 6c 6c 20 | 77 6f 72 6b 20 63 6f 72 |l still |work cor|
|00000c10| 72 65 63 74 6c 79 2c 20 | 74 68 65 79 20 63 61 6e |rectly, |they can|
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|00000c30| 67 65 20 6f 66 20 50 6f | 77 65 72 20 4d 61 63 69 |ge of Po|wer Maci|
|00000c40| 6e 74 6f 73 68 0d 6e 61 | 74 69 76 65 20 63 6f 64 |ntosh.na|tive cod|
|00000c50| 65 2e 0d 53 65 70 61 72 | 61 74 69 6f 6e 20 6f 66 |e..Separ|ation of|
|00000c60| 20 66 75 6e 63 74 69 6f | 6e 20 69 73 20 63 65 6e | functio|n is cen|
|00000c70| 74 72 61 6c 20 74 6f 20 | 74 68 65 20 6e 65 77 20 |tral to |the new |
|00000c80| 61 72 63 68 69 74 65 63 | 74 75 72 65 3a 20 64 72 |architec|ture: dr|
|00000c90| 69 76 65 72 73 20 77 69 | 6c 6c 20 6e 6f 74 20 75 |ivers wi|ll not u|
|00000ca0| 73 65 0d 4d 61 63 69 6e | 74 6f 73 68 20 4f 53 2e |se.Macin|tosh OS.|
|00000cb0| 20 73 65 72 76 69 63 65 | 73 2c 20 61 6e 64 20 61 | service|s, and a|
|00000cc0| 70 70 6c 69 63 61 74 69 | 6f 6e 73 20 61 6e 64 20 |pplicati|ons and |
|00000cd0| 6e 6f 6e 2d 64 72 69 76 | 65 72 20 63 6f 64 65 20 |non-driv|er code |
|00000ce0| 6d 6f 64 75 6c 65 73 20 | 77 69 6c 6c 20 6e 6f 74 |modules |will not|
|00000cf0| 0d 63 61 6c 6c 20 74 68 | 65 20 64 72 69 76 65 72 |.call th|e driver|
|00000d00| 20 73 6f 66 74 77 61 72 | 65 20 6c 69 62 72 61 72 | softwar|e librar|
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|00000d20| 6e 20 73 69 67 6e 69 66 | 69 63 61 6e 74 20 63 68 |n signif|icant ch|
|00000d30| 61 6e 67 65 73 20 66 6f | 72 20 64 72 69 76 65 72 |anges fo|r driver|
|00000d40| 0d 77 72 69 74 65 72 73 | 3a 20 70 61 72 61 6d 65 |.writers|: parame|
|00000d50| 74 65 72 73 20 63 61 6e | 6e 6f 74 20 62 65 20 72 |ters can|not be r|
|00000d60| 65 61 64 20 66 72 6f 6d | 20 72 65 73 6f 75 72 63 |ead from| resourc|
|00000d70| 65 20 66 69 6c 65 73 2c | 20 66 6f 72 20 65 78 61 |e files,| for exa|
|00000d80| 6d 70 6c 65 2e 0d 0d 54 | 68 65 20 54 68 72 65 65 |mple...T|he Three|
|00000d90| 20 41 73 70 65 63 74 73 | 20 6f 66 20 61 20 44 65 | Aspects| of a De|
|00000da0| 76 69 63 65 20 44 72 69 | 76 65 72 0d 7e 7e 7e 7e |vice Dri|ver.~~~~|
|00000db0| 7e 7e 7e 7e 7e 7e 7e 7e | 7e 7e 7e 7e 7e 7e 7e 7e |~~~~~~~~|~~~~~~~~|
|00000dc0| 7e 7e 7e 7e 7e 7e 7e 7e | 7e 0d 41 6c 6c 20 64 65 |~~~~~~~~|~.All de|
|00000dd0| 76 69 63 65 20 64 72 69 | 76 65 72 73 20 63 6f 6e |vice dri|vers con|
|00000de0| 74 61 69 6e 20 74 68 72 | 65 65 20 73 6f 6d 65 77 |tain thr|ee somew|
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