Developer CD Series 1994 December: Reference Library

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MacBinary | 1994-10-25 | 1003.6 KB | [ONLN/HLX2]
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This file was processed as: MacBinary (archive/macBinary).
Confidence	Program	Detection	Match Type	Support
`10%`	dexvert	MacBinary `(archive/macBinary)`	fallback	Supported
`100%`	file	MacBinary II, inited, Mon Mar 28 08:15:22 1994, modified Tue Oct 25 04:33:34 1994, creator 'HLX2', type 'ONLN', 1005500 bytes "PowerBook Duo 280/280c" , at 0xf583c 21917 bytes resource	default (weak)
`99%`	file	data	default
`100%`	TrID	MacBinary 2	default (weak)
`100%`	siegfried	fmt/1762 MacBinary (II)	default
`100%`	lsar	MacBinary	default
id metadata
key	value
macFileType	`[ONLN]`
macFileCreator	`[HLX2]`
hex view
+--------+-------------------------+-------------------------+--------+--------+
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|00000f40| 0d 43 6f 6e 76 65 6e 74 | 69 6f 6e 73 20 61 6e 64 |.Convent|ions and|
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|00000fb0| 0d 0d 46 65 61 74 75 72 | 65 73 14 14 32 0d 43 6f |..Featur|es..2.Co|
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|00001100| 72 20 49 43 20 14 14 31 | 31 0d 44 52 41 4d 20 4c |r IC ..1|1.DRAM L|
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|00003750| 35 30 20 61 6e 64 20 44 | 75 6f 20 32 37 30 63 2e |50 and D|uo 270c.|
|00003760| 29 0d 6e 09 6e 65 77 3a | 20 63 6f 6c 6f 72 20 73 |).n.new:| color s|
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|000038b0| 65 6d 20 52 4f 4d 2c 20 | 64 65 73 63 72 69 62 65 |em ROM, |describe|
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|00003920| 77 61 72 65 20 73 75 70 | 70 6f 72 74 20 66 6f 72 |ware sup|port for|
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|000039e0| 67 65 72 20 49 43 3a 20 | 61 20 63 75 73 74 6f 6d |ger IC: |a custom|
|000039f0| 20 6d 69 63 72 6f 63 6f | 6e 74 72 6f 6c 6c 65 72 | microco|ntroller|
|00003a00| 20 74 68 61 74 20 70 72 | 6f 76 69 64 65 73 20 69 | that pr|ovides i|
|00003a10| 6e 74 65 6c 6c 69 67 65 | 6e 74 20 70 6f 77 65 72 |ntellige|nt power|
|00003a20| 20 6d 61 6e 61 67 65 6d | 65 6e 74 20 0d 6e 09 34 | managem|ent .n.4|
|00003a30| 20 4d 42 20 6f 66 20 52 | 41 4d 20 6f 6e 20 74 68 | MB of R|AM on th|
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|00003a50| 72 64 20 0d 6e 09 38 20 | 4d 42 20 6d 65 6d 6f 72 |rd .n.8 |MB memor|
|00003a60| 79 20 65 78 70 61 6e 73 | 69 6f 6e 20 63 61 72 64 |y expans|ion card|
|00003a70| 20 65 78 70 61 6e 64 73 | 20 52 41 4d 20 63 61 70 | expands| RAM cap|
|00003a80| 61 63 69 74 79 20 75 70 | 20 74 6f 20 31 32 20 4d |acity up| to 12 M|
|00003a90| 42 3b 20 74 68 69 72 64 | 2d 70 61 72 74 79 20 65 |B; third|-party e|
|00003aa0| 78 70 61 6e 73 69 6f 6e | 20 63 61 72 64 20 65 78 |xpansion| card ex|
|00003ab0| 70 61 6e 64 73 20 52 41 | 4d 20 75 70 20 74 6f 20 |pands RA|M up to |
|00003ac0| 34 30 20 4d 42 20 0d 6e | 09 31 20 4d 42 20 6f 66 |40 MB .n|.1 MB of|
|00003ad0| 20 52 4f 4d 0d 6e 09 43 | 6f 6d 62 6f 20 63 75 73 | ROM.n.C|ombo cus|
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|00003af0| 20 74 68 65 20 53 65 72 | 69 61 6c 20 43 6f 6d 6d | the Ser|ial Comm|
|00003b00| 75 6e 69 63 61 74 69 6f | 6e 73 20 43 6f 6e 74 72 |unicatio|ns Contr|
|00003b10| 6f 6c 6c 65 72 20 28 53 | 43 43 29 20 61 6e 64 20 |oller (S|CC) and |
|00003b20| 53 6d 61 6c 6c 20 43 6f | 6d 70 75 74 65 72 20 53 |Small Co|mputer S|
|00003b30| 79 73 74 65 6d 20 49 6e | 74 65 72 66 61 63 65 20 |ystem In|terface |
|00003b40| 28 53 43 53 49 29 20 63 | 6f 6e 74 72 6f 6c 6c 65 |(SCSI) c|ontrolle|
|00003b50| 72 20 0d 6e 09 73 6f 75 | 6e 64 20 63 69 72 63 75 |r .n.sou|nd circu|
|00003b60| 69 74 73 3a 20 70 72 6f | 76 69 64 65 20 38 2d 62 |its: pro|vide 8-b|
|00003b70| 69 74 20 6d 6f 6e 61 75 | 72 61 6c 20 73 6f 75 6e |it monau|ral soun|
|00003b80| 64 20 69 6e 70 75 74 20 | 61 6e 64 20 6f 75 74 70 |d input |and outp|
|00003b90| 75 74 20 0d 6e 09 69 6e | 74 65 67 72 61 6c 20 6d |ut .n.in|tegral m|
|00003ba0| 69 63 72 6f 70 68 6f 6e | 65 20 61 6e 64 20 73 70 |icrophon|e and sp|
|00003bb0| 65 61 6b 65 72 73 20 0d | 6e 09 45 78 70 72 65 73 |eakers .|n.Expres|
|00003bc0| 73 20 4d 6f 64 65 6d 3a | 20 69 6e 74 65 72 6e 61 |s Modem:| interna|
|00003bd0| 6c 20 6d 6f 64 65 6d 2f | 66 61 78 20 63 61 72 64 |l modem/|fax card|
|00003be0| 20 0d 6e 09 6b 65 79 62 | 6f 61 72 64 3a 20 69 6e | .n.keyb|oard: in|
|00003bf0| 74 65 67 72 61 6c 20 66 | 75 6c 6c 2d 66 75 6e 63 |tegral f|ull-func|
|00003c00| 74 69 6f 6e 20 6b 65 79 | 62 6f 61 72 64 20 77 69 |tion key|board wi|
|00003c10| 74 68 20 74 72 61 63 6b | 62 61 6c 6c 20 0d 6e 09 |th track|ball .n.|
|00003c20| 49 2f 4f 20 70 6f 72 74 | 73 3a 20 6f 6e 65 20 31 |I/O port|s: one 1|
|00003c30| 35 32 2d 70 69 6e 20 63 | 6f 6e 6e 65 63 74 6f 72 |52-pin c|onnector|
|00003c40| 20 66 6f 72 20 65 78 70 | 61 6e 73 69 6f 6e 20 64 | for exp|ansion d|
|00003c50| 65 76 69 63 65 73 2c 20 | 6f 6e 65 20 6d 69 6e 69 |evices, |one mini|
|00003c60| 2d 44 49 4e 20 38 2d 70 | 69 6e 20 73 65 72 69 61 |-DIN 8-p|in seria|
|00003c70| 6c 20 70 6f 72 74 2c 20 | 61 6e 64 20 6f 6e 65 20 |l port, |and one |
|00003c80| 6d 6f 64 65 6d 20 70 6f | 72 74 20 0d 6e 09 6e 69 |modem po|rt .n.ni|
|00003c90| 63 6b 65 6c 20 6d 65 74 | 61 6c 20 68 79 64 72 69 |ckel met|al hydri|
|00003ca0| 64 65 20 62 61 74 74 65 | 72 79 3a 20 34 2e 35 20 |de batte|ry: 4.5 |
|00003cb0| 61 6d 70 65 72 65 2d 68 | 6f 75 72 20 72 65 6d 6f |ampere-h|our remo|
|00003cc0| 76 61 62 6c 65 20 61 6e | 64 20 72 65 63 68 61 72 |vable an|d rechar|
|00003cd0| 67 65 61 62 6c 65 20 62 | 61 74 74 65 72 79 20 0d |geable b|attery .|
|00003ce0| 0d 43 6f 6e 66 69 67 75 | 72 61 74 69 6f 6e 73 0d |.Configu|rations.|
|00003cf0| 0d 54 68 65 20 50 6f 77 | 65 72 42 6f 6f 6b 20 44 |.The Pow|erBook D|
|00003d00| 75 6f 20 32 38 30 20 61 | 6e 64 20 32 38 30 63 20 |uo 280 a|nd 280c |
|00003d10| 63 6f 6d 70 75 74 65 72 | 73 20 61 72 65 20 61 76 |computer|s are av|
|00003d20| 61 69 6c 61 62 6c 65 20 | 69 6e 20 74 77 6f 20 63 |ailable |in two c|
|00003d30| 6f 6e 66 69 67 75 72 61 | 74 69 6f 6e 73 20 65 61 |onfigura|tions ea|
|00003d40| 63 68 2c 20 61 73 20 73 | 68 6f 77 6e 20 69 6e 20 |ch, as s|hown in |
|00003d50| 54 61 62 6c 65 20 31 2d | 31 2e 0d 54 61 62 6c 65 |Table 1-|1..Table|
|00003d60| 20 31 2d 31 09 4d 6f 64 | 65 6c 73 20 61 6e 64 20 | 1-1.Mod|els and |
|00003d70| 63 6f 6e 66 69 67 75 72 | 61 74 69 6f 6e 73 20 0d |configur|ations .|
|00003d80| 4d 6f 64 65 6c 20 09 44 | 69 73 70 6c 61 79 20 74 |Model .D|isplay t|
|00003d90| 79 70 65 09 53 69 7a 65 | 20 6f 66 20 52 41 4d 20 |ype.Size| of RAM |
|00003da0| 09 53 69 7a 65 20 6f 66 | 20 68 61 72 64 20 64 69 |.Size of| hard di|
|00003db0| 73 6b 09 4d 6f 64 65 6d | 20 69 6e 63 6c 75 64 65 |sk.Modem| include|
|00003dc0| 64 09 0d 50 6f 77 65 72 | 42 6f 6f 6b 20 44 75 6f |d..Power|Book Duo|
|00003dd0| 20 32 38 30 09 47 72 61 | 79 73 63 61 6c 65 2c 20 | 280.Gra|yscale, |
|00003de0| 61 63 74 69 76 65 20 6d | 61 74 72 69 78 09 34 20 |active m|atrix.4 |
|00003df0| 4d 42 09 32 30 30 20 4d | 42 09 4e 6f 09 0d 50 6f |MB.200 M|B.No..Po|
|00003e00| 77 65 72 42 6f 6f 6b 20 | 44 75 6f 20 32 38 30 20 |werBook |Duo 280 |
|00003e10| 09 47 72 61 79 73 63 61 | 6c 65 2c 20 61 63 74 69 |.Graysca|le, acti|
|00003e20| 76 65 20 6d 61 74 72 69 | 78 09 31 32 20 4d 42 09 |ve matri|x.12 MB.|
|00003e30| 32 30 30 20 4d 42 09 59 | 65 73 09 0d 50 6f 77 65 |200 MB.Y|es..Powe|
|00003e40| 72 42 6f 6f 6b 20 44 75 | 6f 20 32 38 30 09 47 72 |rBook Du|o 280.Gr|
|00003e50| 61 79 73 63 61 6c 65 2c | 20 61 63 74 69 76 65 20 |ayscale,| active |
|00003e60| 6d 61 74 72 69 78 09 34 | 20 4d 42 09 32 34 30 20 |matrix.4| MB.240 |
|00003e70| 4d 42 09 4e 6f 09 0d 50 | 6f 77 65 72 42 6f 6f 6b |MB.No..P|owerBook|
|00003e80| 20 44 75 6f 20 32 38 30 | 09 47 72 61 79 73 63 61 | Duo 280|.Graysca|
|00003e90| 6c 65 2c 20 61 63 74 69 | 76 65 20 6d 61 74 72 69 |le, acti|ve matri|
|00003ea0| 78 09 31 32 20 4d 42 09 | 32 34 30 20 4d 42 09 59 |x.12 MB.|240 MB.Y|
|00003eb0| 65 73 09 0d 50 6f 77 65 | 72 42 6f 6f 6b 20 44 75 |es..Powe|rBook Du|
|00003ec0| 6f 20 32 38 30 63 09 43 | 6f 6c 6f 72 2c 20 61 63 |o 280c.C|olor, ac|
|00003ed0| 74 69 76 65 20 6d 61 74 | 72 69 78 09 34 20 4d 42 |tive mat|rix.4 MB|
|00003ee0| 09 33 32 30 20 4d 42 09 | 4e 6f 09 0d 50 6f 77 65 |.320 MB.|No..Powe|
|00003ef0| 72 42 6f 6f 6b 20 44 75 | 6f 20 32 38 30 63 09 43 |rBook Du|o 280c.C|
|00003f00| 6f 6c 6f 72 2c 20 61 63 | 74 69 76 65 20 6d 61 74 |olor, ac|tive mat|
|00003f10| 72 69 78 09 31 32 20 4d | 42 09 33 32 30 20 4d 42 |rix.12 M|B.320 MB|
|00003f20| 09 59 65 73 09 0d 20 0d | 0d 0d 41 63 63 65 73 73 |.Yes.. .|..Access|
|00003f30| 6f 72 79 20 44 65 76 69 | 63 65 73 0d 0d 49 6e 20 |ory Devi|ces..In |
|00003f40| 61 64 64 69 74 69 6f 6e | 20 74 6f 20 74 68 65 20 |addition| to the |
|00003f50| 64 65 76 69 63 65 73 20 | 74 68 61 74 20 61 72 65 |devices |that are|
|00003f60| 20 69 6e 63 6c 75 64 65 | 64 20 77 69 74 68 20 74 | include|d with t|
|00003f70| 68 65 20 50 6f 77 65 72 | 42 6f 6f 6b 20 44 75 6f |he Power|Book Duo|
|00003f80| 20 32 38 30 20 61 6e 64 | 20 32 38 30 63 20 63 6f | 280 and| 280c co|
|00003f90| 6d 70 75 74 65 72 73 2c | 20 74 68 65 20 66 6f 6c |mputers,| the fol|
|00003fa0| 6c 6f 77 69 6e 67 20 61 | 63 63 65 73 73 6f 72 79 |lowing a|ccessory|
|00003fb0| 20 64 65 76 69 63 65 73 | 20 61 72 65 20 61 76 61 | devices| are ava|
|00003fc0| 69 6c 61 62 6c 65 3a 20 | 0d 6e 09 54 68 65 20 50 |ilable: |.n.The P|
|00003fd0| 6f 77 65 72 42 6f 6f 6b | 20 44 75 6f 20 38 20 4d |owerBook| Duo 8 M|
|00003fe0| 42 20 4d 65 6d 6f 72 79 | 20 45 78 70 61 6e 73 69 |B Memory| Expansi|
|00003ff0| 6f 6e 20 4b 69 74 20 65 | 78 70 61 6e 64 73 20 74 |on Kit e|xpands t|
|00004000| 68 65 20 52 41 4d 20 69 | 6e 20 74 68 65 20 63 6f |he RAM i|n the co|
|00004010| 6d 70 75 74 65 72 73 20 | 74 6f 20 31 32 20 4d 42 |mputers |to 12 MB|
|00004020| 2e 0d 6e 09 54 68 65 20 | 50 6f 77 65 72 42 6f 6f |..n.The |PowerBoo|
|00004030| 6b 20 44 75 6f 20 42 61 | 74 74 65 72 79 20 54 79 |k Duo Ba|ttery Ty|
|00004040| 70 65 20 49 49 49 20 69 | 73 20 61 76 61 69 6c 61 |pe III i|s availa|
|00004050| 62 6c 65 20 73 65 70 61 | 72 61 74 65 6c 79 20 61 |ble sepa|rately a|
|00004060| 73 20 61 6e 20 61 64 64 | 69 74 69 6f 6e 61 6c 20 |s an add|itional |
|00004070| 6f 72 20 72 65 70 6c 61 | 63 65 6d 65 6e 74 20 62 |or repla|cement b|
|00004080| 61 74 74 65 72 79 2e 20 | 0d 6e 09 54 68 65 20 50 |attery. |.n.The P|
|00004090| 6f 77 65 72 20 41 64 61 | 70 74 65 72 20 49 49 2c |ower Ada|pter II,|
|000040a0| 20 74 68 65 20 41 43 20 | 61 64 61 70 74 65 72 20 | the AC |adapter |
|000040b0| 74 68 61 74 20 63 6f 6d | 65 73 20 77 69 74 68 20 |that com|es with |
|000040c0| 74 68 65 20 63 6f 6d 70 | 75 74 65 72 73 2c 20 69 |the comp|uters, i|
|000040d0| 73 20 61 6c 73 6f 20 61 | 76 61 69 6c 61 62 6c 65 |s also a|vailable|
|000040e0| 20 73 65 70 61 72 61 74 | 65 6c 79 2e 20 0d 41 6c | separat|ely. .Al|
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|00004100| 73 73 6f 72 69 65 73 20 | 66 6f 72 20 74 68 65 20 |ssories |for the |
|00004110| 50 6f 77 65 72 42 6f 6f | 6b 20 44 75 6f 20 66 61 |PowerBoo|k Duo fa|
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|00004250| 6b 65 79 20 61 72 65 61 | 73 20 79 6f 75 20 73 68 |key area|s you sh|
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|00004370| 6b 44 72 61 77 20 61 6e | 64 20 74 68 65 20 50 61 |kDraw an|d the Pa|
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|00005270| 6b 6e 6f 77 6c 65 64 67 | 65 20 63 79 63 6c 65 73 |knowledg|e cycles|
|00005280| 20 61 72 65 20 6e 6f 74 | 20 70 72 65 73 65 6e 74 | are not| present|
|00005290| 20 6f 6e 20 74 68 65 20 | 50 44 53 2e 20 0d 6e 09 | on the |PDS. .n.|
|000052a0| 42 72 65 61 6b 70 6f 69 | 6e 74 20 61 63 6b 6e 6f |Breakpoi|nt ackno|
|000052b0| 77 6c 65 64 67 65 20 63 | 79 63 6c 65 73 20 61 72 |wledge c|ycles ar|
|000052c0| 65 20 6e 6f 74 20 70 72 | 65 73 65 6e 74 20 6f 6e |e not pr|esent on|
|000052d0| 20 74 68 65 20 50 44 53 | 2e 0d 46 75 74 75 72 65 | the PDS|..Future|
|000052e0| 20 6d 6f 64 65 6c 73 20 | 6f 66 20 74 68 65 20 50 | models |of the P|
|000052f0| 6f 77 65 72 42 6f 6f 6b | 20 44 75 6f 20 77 69 6c |owerBook| Duo wil|
|00005300| 6c 20 63 6f 6e 74 69 6e | 75 65 20 74 6f 20 73 75 |l contin|ue to su|
|00005310| 70 70 6f 72 74 20 74 68 | 65 20 31 35 32 2d 70 69 |pport th|e 152-pi|
|00005320| 6e 20 50 44 53 2c 20 62 | 75 74 20 74 68 65 69 72 |n PDS, b|ut their|
|00005330| 20 61 72 63 68 69 74 65 | 63 74 75 72 65 20 6d 61 | archite|cture ma|
|00005340| 79 20 63 68 61 6e 67 65 | 20 73 75 63 68 20 74 68 |y change| such th|
|00005350| 61 74 20 73 6f 6d 65 20 | 4d 43 36 38 30 33 30 20 |at some |MC68030 |
|00005360| 6d 6f 64 65 73 20 6d 61 | 79 20 6e 6f 74 20 62 65 |modes ma|y not be|
|00005370| 20 73 75 70 70 6f 72 74 | 65 64 2e 20 54 68 65 20 | support|ed. The |
|00005380| 66 6f 6c 6c 6f 77 69 6e | 67 20 6d 69 63 72 6f 70 |followin|g microp|
|00005390| 72 6f 63 65 73 73 6f 72 | 20 6d 6f 64 65 73 20 6d |rocessor| modes m|
|000053a0| 61 79 20 6e 6f 74 20 62 | 65 20 73 75 70 70 6f 72 |ay not b|e suppor|
|000053b0| 74 65 64 20 69 6e 20 66 | 75 74 75 72 65 20 6d 6f |ted in f|uture mo|
|000053c0| 64 65 6c 73 2e 20 0d 6e | 09 54 68 65 20 62 75 73 |dels. .n|.The bus|
|000053d0| 20 67 72 61 6e 74 20 73 | 69 67 6e 61 6c 20 6d 61 | grant s|ignal ma|
|000053e0| 79 20 6e 6f 74 20 61 6c | 77 61 79 73 20 62 65 20 |y not al|ways be |
|000053f0| 61 73 73 65 72 74 65 64 | 20 77 69 74 68 69 6e 20 |asserted| within |
|00005400| 33 2e 35 20 63 6c 6f 63 | 6b 73 20 6f 66 20 74 68 |3.5 cloc|ks of th|
|00005410| 65 20 61 73 73 65 72 74 | 69 6f 6e 20 6f 66 20 74 |e assert|ion of t|
|00005420| 68 65 20 62 75 73 20 72 | 65 71 75 65 73 74 20 73 |he bus r|equest s|
|00005430| 69 67 6e 61 6c 20 65 76 | 65 6e 20 69 66 20 2f 52 |ignal ev|en if /R|
|00005440| 4d 43 20 69 73 20 6e 6f | 74 20 61 73 73 65 72 74 |MC is no|t assert|
|00005450| 65 64 2e 20 0d 6e 09 4f | 77 6e 65 72 73 68 69 70 |ed. .n.O|wnership|
|00005460| 20 6f 66 20 74 68 65 20 | 4d 43 36 38 30 33 30 20 | of the |MC68030 |
|00005470| 62 75 73 20 65 78 74 65 | 6e 64 73 20 74 6f 20 61 |bus exte|nds to a|
|00005480| 6c 6c 20 6f 74 68 65 72 | 20 62 75 73 65 73 2e 20 |ll other| buses. |
|00005490| 52 65 6c 69 6e 71 75 69 | 73 68 20 61 6e 64 20 72 |Relinqui|sh and r|
|000054a0| 65 74 72 79 20 6f 70 65 | 72 61 2d 0d 74 69 6f 6e |etry ope|ra-.tion|
|000054b0| 73 20 77 69 6c 6c 20 6e | 6f 74 20 62 65 20 73 75 |s will n|ot be su|
|000054c0| 70 70 6f 72 74 65 64 20 | 64 75 72 69 6e 67 20 64 |pported |during d|
|000054d0| 79 6e 61 6d 69 63 20 62 | 75 73 20 73 69 7a 69 6e |ynamic b|us sizin|
|000054e0| 67 20 6f 72 20 77 68 69 | 6c 65 20 2f 52 4d 43 20 |g or whi|le /RMC |
|000054f0| 69 73 20 61 73 73 65 72 | 74 65 64 2e 20 0d 6e 09 |is asser|ted. .n.|
|00005500| 42 75 72 73 74 20 6d 6f | 64 65 20 66 72 6f 6d 20 |Burst mo|de from |
|00005510| 50 44 53 20 73 70 61 63 | 65 20 77 69 6c 6c 20 6e |PDS spac|e will n|
|00005520| 6f 74 20 62 65 20 70 6f | 73 73 69 62 6c 65 3b 20 |ot be po|ssible; |
|00005530| 74 68 65 20 63 6f 6d 70 | 75 74 65 72 20 77 69 6c |the comp|uter wil|
|00005540| 6c 20 6e 65 76 65 72 20 | 61 73 73 65 72 74 20 74 |l never |assert t|
|00005550| 68 65 20 63 61 63 68 65 | 20 62 75 72 73 74 20 72 |he cache| burst r|
|00005560| 65 71 75 65 73 74 20 73 | 69 67 6e 61 6c 20 74 6f |equest s|ignal to|
|00005570| 20 74 68 65 20 50 44 53 | 2e 20 0d 6e 09 41 6c 74 | the PDS|. .n.Alt|
|00005580| 65 72 6e 61 74 69 76 65 | 20 62 75 73 20 6d 61 73 |ernative| bus mas|
|00005590| 74 65 72 73 20 77 69 6c | 6c 20 6e 6f 74 20 72 65 |ters wil|l not re|
|000055a0| 63 65 69 76 65 20 61 20 | 63 61 63 68 65 20 62 75 |ceive a |cache bu|
|000055b0| 72 73 74 20 61 63 6b 6e | 6f 77 6c 65 64 67 65 20 |rst ackn|owledge |
|000055c0| 77 68 65 6e 20 74 68 65 | 79 20 72 65 61 64 20 6f |when the|y read o|
|000055d0| 72 20 77 72 69 74 65 20 | 74 6f 20 52 4f 4d 20 6f |r write |to ROM o|
|000055e0| 72 20 44 52 41 4d 20 61 | 64 64 72 65 73 73 20 73 |r DRAM a|ddress s|
|000055f0| 70 61 63 65 2e 0d 48 61 | 72 64 77 61 72 65 20 46 |pace..Ha|rdware F|
|00005600| 65 61 74 75 72 65 73 0d | 0d 0d 54 68 69 73 20 63 |eatures.|..This c|
|00005610| 68 61 70 74 65 72 20 64 | 65 73 63 72 69 62 65 73 |hapter d|escribes|
|00005620| 20 68 61 72 64 77 61 72 | 65 20 66 65 61 74 75 72 | hardwar|e featur|
|00005630| 65 73 20 6f 66 20 74 68 | 65 20 50 6f 77 65 72 42 |es of th|e PowerB|
|00005640| 6f 6f 6b 20 44 75 6f 20 | 32 38 30 20 61 6e 64 20 |ook Duo |280 and |
|00005650| 32 38 30 63 20 63 6f 6d | 70 75 74 65 72 73 20 74 |280c com|puters t|
|00005660| 68 61 74 20 6d 61 6b 65 | 20 74 68 65 6d 20 64 69 |hat make| them di|
|00005670| 66 66 65 72 65 6e 74 20 | 66 72 6f 6d 20 74 68 65 |fferent |from the|
|00005680| 20 6f 72 69 67 69 6e 61 | 6c 20 4d 61 63 69 6e 74 | origina|l Macint|
|00005690| 6f 73 68 20 50 6f 77 65 | 72 42 6f 6f 6b 20 44 75 |osh Powe|rBook Du|
|000056a0| 6f 20 63 6f 6d 70 75 74 | 65 72 73 20 64 65 73 63 |o comput|ers desc|
|000056b0| 72 69 62 65 64 20 69 6e | 20 4d 61 63 69 6e 74 6f |ribed in| Macinto|
|000056c0| 73 68 20 44 65 76 65 6c | 6f 70 65 72 20 4e 6f 74 |sh Devel|oper Not|
|000056d0| 65 20 4e 75 6d 62 65 72 | 20 32 2e 20 54 68 65 20 |e Number| 2. The |
|000056e0| 6e 65 77 20 66 65 61 74 | 75 72 65 73 20 69 6e 63 |new feat|ures inc|
|000056f0| 6c 75 64 65 20 73 65 76 | 65 72 61 6c 20 63 68 61 |lude sev|eral cha|
|00005700| 6e 67 65 73 20 74 6f 20 | 74 68 65 20 6d 61 69 6e |nges to |the main|
|00005710| 20 6c 6f 67 69 63 20 62 | 6f 61 72 64 20 61 73 20 | logic b|oard as |
|00005720| 77 65 6c 6c 20 61 73 20 | 63 68 61 6e 67 65 73 20 |well as |changes |
|00005730| 74 6f 20 74 68 65 20 64 | 69 73 70 6c 61 79 2c 20 |to the d|isplay, |
|00005740| 74 68 65 20 69 6e 74 65 | 72 6e 61 6c 20 68 61 72 |the inte|rnal har|
|00005750| 64 20 64 69 73 6b 2c 20 | 74 68 65 20 69 6e 76 65 |d disk, |the inve|
|00005760| 72 74 65 72 2f 73 70 65 | 61 6b 65 72 20 62 6f 61 |rter/spe|aker boa|
|00005770| 72 64 2c 20 61 6e 64 20 | 74 68 65 20 63 6c 61 6d |rd, and |the clam|
|00005780| 73 68 65 6c 6c 20 68 6f | 75 73 69 6e 67 2e 20 0d |shell ho|using. .|
|00005790| 0d 43 68 61 6e 67 65 73 | 20 6f 6e 20 74 68 65 20 |.Changes| on the |
|000057a0| 4d 61 69 6e 20 4c 6f 67 | 69 63 20 42 6f 61 72 64 |Main Log|ic Board|
|000057b0| 0d 0d 54 68 65 20 6f 75 | 74 6c 69 6e 65 20 6f 66 |..The ou|tline of|
|000057c0| 20 74 68 65 20 6d 61 69 | 6e 20 6c 6f 67 69 63 20 | the mai|n logic |
|000057d0| 62 6f 61 72 64 20 69 6e | 20 74 68 65 20 50 6f 77 |board in| the Pow|
|000057e0| 65 72 42 6f 6f 6b 20 44 | 75 6f 20 32 38 30 20 61 |erBook D|uo 280 a|
|000057f0| 6e 64 20 32 38 30 63 20 | 63 6f 6d 70 75 74 65 72 |nd 280c |computer|
|00005800| 73 20 69 73 20 69 64 65 | 6e 74 69 63 61 6c 20 74 |s is ide|ntical t|
|00005810| 6f 20 74 68 65 20 6f 75 | 74 6c 69 6e 65 20 6f 66 |o the ou|tline of|
|00005820| 20 74 68 65 20 6d 61 69 | 6e 20 6c 6f 67 69 63 20 | the mai|n logic |
|00005830| 62 6f 61 72 64 20 69 6e | 20 74 68 65 20 6f 72 69 |board in| the ori|
|00005840| 67 69 6e 61 6c 20 50 6f | 77 65 72 42 6f 6f 6b 20 |ginal Po|werBook |
|00005850| 44 75 6f 20 6d 6f 64 65 | 6c 73 2e 20 48 6f 77 65 |Duo mode|ls. Howe|
|00005860| 76 65 72 2c 20 74 68 65 | 72 65 20 61 72 65 20 73 |ver, the|re are s|
|00005870| 65 76 65 72 61 6c 20 63 | 6f 6d 70 6f 6e 65 6e 74 |everal c|omponent|
|00005880| 20 63 68 61 6e 67 65 73 | 2c 20 61 73 20 64 65 73 | changes|, as des|
|00005890| 63 72 69 62 65 64 20 69 | 6e 20 74 68 65 20 66 6f |cribed i|n the fo|
|000058a0| 6c 6c 6f 77 69 6e 67 20 | 73 65 63 74 69 6f 6e 2e |llowing |section.|
|000058b0| 20 46 69 67 75 72 65 20 | 32 2d 31 20 69 73 20 61 | Figure |2-1 is a|
|000058c0| 20 64 69 61 67 72 61 6d | 20 6f 66 20 74 68 65 20 | diagram| of the |
|000058d0| 6d 61 69 6e 20 6c 6f 67 | 69 63 20 62 6f 61 72 64 |main log|ic board|
|000058e0| 2c 20 77 69 74 68 20 74 | 68 65 20 6e 65 77 20 63 |, with t|he new c|
|000058f0| 6f 6d 70 6f 6e 65 6e 74 | 73 20 73 68 61 64 65 64 |omponent|s shaded|
|00005900| 2e 20 0d 54 68 65 20 63 | 68 61 6e 67 65 73 20 74 |. .The c|hanges t|
|00005910| 6f 20 74 68 65 20 6d 61 | 69 6e 20 6c 6f 67 69 63 |o the ma|in logic|
|00005920| 20 62 6f 61 72 64 20 62 | 6f 61 72 64 20 61 72 65 | board b|oard are|
|00005930| 20 0d 6e 09 72 65 70 6c | 61 63 65 6d 65 6e 74 20 | .n.repl|acement |
|00005940| 6f 66 20 74 68 65 20 4d | 43 36 38 30 33 30 20 6d |of the M|C68030 m|
|00005950| 69 63 72 6f 70 72 6f 63 | 65 73 73 6f 72 20 77 69 |icroproc|essor wi|
|00005960| 74 68 20 74 68 65 20 4d | 43 36 38 4c 43 30 34 30 |th the M|C68LC040|
|00005970| 20 0d 6e 09 61 64 64 69 | 74 69 6f 6e 20 6f 66 20 | .n.addi|tion of |
|00005980| 74 68 65 20 4d 42 54 20 | 28 6d 69 63 72 6f 70 72 |the MBT |(micropr|
|00005990| 6f 63 65 73 73 6f 72 20 | 62 75 73 20 74 72 61 6e |ocessor |bus tran|
|000059a0| 73 6c 61 74 6f 72 29 20 | 0d 6e 09 72 65 70 6c 61 |slator) |.n.repla|
|000059b0| 63 65 6d 65 6e 74 20 6f | 66 20 74 68 65 20 47 53 |cement o|f the GS|
|000059c0| 43 20 28 67 72 61 79 73 | 63 61 6c 65 20 63 6f 6e |C (grays|cale con|
|000059d0| 74 72 6f 6c 6c 65 72 29 | 20 77 69 74 68 20 74 68 |troller)| with th|
|000059e0| 65 20 43 53 43 20 28 63 | 6f 6c 6f 72 20 73 63 72 |e CSC (c|olor scr|
|000059f0| 65 65 6e 20 63 6f 6e 74 | 72 6f 6c 6c 65 72 29 20 |een cont|roller) |
|00005a00| 0d 46 69 67 75 72 65 20 | 32 2d 31 09 4d 61 69 6e |.Figure |2-1.Main|
|00005a10| 20 6c 6f 67 69 63 20 62 | 6f 61 72 64 20 0d 0d 6e | logic b|oard ..n|
|00005a20| 09 72 65 61 72 72 61 6e | 67 65 6d 65 6e 74 20 6f |.rearran|gement o|
|00005a30| 66 20 74 68 65 20 6f 6e | 2d 62 6f 61 72 64 20 44 |f the on|-board D|
|00005a40| 52 41 4d 20 0d 6e 09 72 | 65 61 72 72 61 6e 67 65 |RAM .n.r|earrange|
|00005a50| 6d 65 6e 74 20 6f 66 20 | 74 68 65 20 6f 6e 2d 62 |ment of |the on-b|
|00005a60| 6f 61 72 64 20 56 52 41 | 4d 20 61 6e 64 20 52 4f |oard VRA|M and RO|
|00005a70| 4d 0d 46 69 67 75 72 65 | 20 32 2d 32 20 69 73 20 |M.Figure| 2-2 is |
|00005a80| 61 20 62 6c 6f 63 6b 20 | 64 69 61 67 72 61 6d 20 |a block |diagram |
|00005a90| 73 68 6f 77 69 6e 67 20 | 74 68 65 20 72 65 6c 61 |showing |the rela|
|00005aa0| 74 69 6f 6e 73 68 69 70 | 20 6f 66 20 74 68 65 20 |tionship| of the |
|00005ab0| 6d 69 63 72 6f 70 72 6f | 63 65 73 73 6f 72 20 61 |micropro|cessor a|
|00005ac0| 6e 64 20 74 68 65 20 4d | 42 54 20 74 6f 20 74 68 |nd the M|BT to th|
|00005ad0| 65 20 6f 74 68 65 72 20 | 49 43 73 20 6f 6e 20 74 |e other |ICs on t|
|00005ae0| 68 65 20 6c 6f 67 69 63 | 20 62 6f 61 72 64 2e 20 |he logic| board. |
|00005af0| 0d 46 69 67 75 72 65 20 | 32 2d 32 09 42 6c 6f 63 |.Figure |2-2.Bloc|
|00005b00| 6b 20 64 69 61 67 72 61 | 6d 0d 0d 4d 43 36 38 4c |k diagra|m..MC68L|
|00005b10| 43 30 34 30 20 4d 69 63 | 72 6f 70 72 6f 63 65 73 |C040 Mic|roproces|
|00005b20| 73 6f 72 0d 0d 54 68 65 | 20 6d 69 63 72 6f 70 72 |sor..The| micropr|
|00005b30| 6f 63 65 73 73 6f 72 20 | 75 73 65 64 20 69 6e 20 |ocessor |used in |
|00005b40| 74 68 65 20 50 6f 77 65 | 72 42 6f 6f 6b 20 44 75 |the Powe|rBook Du|
|00005b50| 6f 20 32 38 30 20 61 6e | 64 20 32 38 30 63 20 63 |o 280 an|d 280c c|
|00005b60| 6f 6d 70 75 74 65 72 73 | 20 69 73 20 74 68 65 20 |omputers| is the |
|00005b70| 4d 43 36 38 4c 43 30 34 | 30 2e 20 54 68 65 20 4d |MC68LC04|0. The M|
|00005b80| 43 36 38 4c 43 30 34 30 | 20 20 69 6e 63 6c 75 64 |C68LC040|  includ|
|00005b90| 65 73 20 61 20 62 75 69 | 6c 74 2d 69 6e 20 4d 4d |es a bui|lt-in MM|
|00005ba0| 55 20 28 6d 65 6d 6f 72 | 79 20 6d 61 6e 61 67 65 |U (memor|y manage|
|00005bb0| 6d 65 6e 74 20 75 6e 69 | 74 29 20 74 68 61 74 20 |ment uni|t) that |
|00005bc0| 70 65 72 66 6f 72 6d 73 | 20 74 68 65 20 6d 65 6d |performs| the mem|
|00005bd0| 6f 72 79 2d 6d 61 70 70 | 69 6e 67 20 66 75 6e 63 |ory-mapp|ing func|
|00005be0| 74 69 6f 6e 73 2e 20 0d | 49 4d 50 4f 52 54 41 4e |tions. .|IMPORTAN|
|00005bf0| 54 0d 54 68 65 20 4d 43 | 36 38 4c 43 30 34 30 20 |T.The MC|68LC040 |
|00005c00| 64 6f 65 73 20 6e 6f 74 | 20 63 6f 6e 74 61 69 6e |does not| contain|
|00005c10| 20 61 6e 20 46 50 55 20 | 28 66 6c 6f 61 74 69 6e | an FPU |(floatin|
|00005c20| 67 2d 70 6f 69 6e 74 20 | 75 6e 69 74 29 2e 20 0d |g-point |unit). .|
|00005c30| 54 68 65 72 65 20 69 73 | 20 6e 6f 20 46 50 55 20 |There is| no FPU |
|00005c40| 75 70 67 72 61 64 65 20 | 66 6f 72 20 74 68 65 20 |upgrade |for the |
|00005c50| 50 6f 77 65 72 42 6f 6f | 6b 20 44 75 6f 20 32 38 |PowerBoo|k Duo 28|
|00005c60| 30 20 61 6e 64 20 32 38 | 30 63 20 63 6f 6d 70 75 |0 and 28|0c compu|
|00005c70| 74 65 72 73 20 61 6e 64 | 20 74 68 6f 73 65 20 63 |ters and| those c|
|00005c80| 6f 6d 70 75 74 65 72 73 | 20 63 61 6e 6e 6f 74 20 |omputers| cannot |
|00005c90| 75 73 65 20 74 68 65 20 | 65 78 74 65 72 6e 61 6c |use the |external|
|00005ca0| 20 46 50 55 20 69 6e 20 | 0d 74 68 65 20 44 75 6f | FPU in |.the Duo|
|00005cb0| 20 44 6f 63 6b 20 61 6e | 64 20 44 75 6f 20 44 6f | Dock an|d Duo Do|
|00005cc0| 63 6b 20 49 49 2e 13 73 | 20 0d 54 68 65 20 4d 43 |ck II..s| .The MC|
|00005cd0| 36 38 4c 43 30 34 30 20 | 6d 69 63 72 6f 70 72 6f |68LC040 |micropro|
|00005ce0| 63 65 73 73 6f 72 20 72 | 75 6e 73 20 61 74 20 61 |cessor r|uns at a|
|00005cf0| 6e 20 69 6e 74 65 72 6e | 61 6c 20 63 6c 6f 63 6b |n intern|al clock|
|00005d00| 20 72 61 74 65 20 74 68 | 61 74 20 69 73 20 64 6f | rate th|at is do|
|00005d10| 75 62 6c 65 20 69 74 73 | 20 65 78 74 65 72 6e 61 |uble its| externa|
|00005d20| 6c 20 63 6c 6f 63 6b 20 | 72 61 74 65 2e 20 54 68 |l clock |rate. Th|
|00005d30| 65 20 4d 43 36 38 4c 43 | 30 34 30 20 69 6e 20 74 |e MC68LC|040 in t|
|00005d40| 68 65 20 50 6f 77 65 72 | 42 6f 6f 6b 20 44 75 6f |he Power|Book Duo|
|00005d50| 20 32 38 30 20 61 6e 64 | 20 32 38 30 63 20 63 6f | 280 and| 280c co|
|00005d60| 6d 70 75 74 65 72 73 20 | 68 61 73 20 61 6e 20 65 |mputers |has an e|
|00005d70| 78 74 65 72 6e 61 6c 20 | 63 6c 6f 63 6b 20 72 61 |xternal |clock ra|
|00005d80| 74 65 20 6f 66 20 33 33 | 20 4d 48 7a 20 61 6e 64 |te of 33| MHz and|
|00005d90| 20 61 6e 20 69 6e 74 65 | 72 6e 61 6c 20 63 6c 6f | an inte|rnal clo|
|00005da0| 63 6b 20 72 61 74 65 20 | 6f 66 20 36 36 20 4d 48 |ck rate |of 66 MH|
|00005db0| 7a 2e 20 0d 54 68 65 20 | 50 6f 77 65 72 42 6f 6f |z. .The |PowerBoo|
|00005dc0| 6b 20 44 75 6f 20 32 38 | 30 20 61 6e 64 20 44 75 |k Duo 28|0 and Du|
|00005dd0| 6f 20 32 38 30 63 20 64 | 6f 20 6e 6f 74 20 73 75 |o 280c d|o not su|
|00005de0| 70 70 6f 72 74 20 65 78 | 74 65 72 6e 61 6c 20 64 |pport ex|ternal d|
|00005df0| 69 72 65 63 74 2d 6d 61 | 70 70 65 64 20 63 61 63 |irect-ma|pped cac|
|00005e00| 68 65 73 20 61 6e 64 20 | 77 69 6c 6c 20 6e 6f 74 |hes and |will not|
|00005e10| 20 6d 61 6b 65 20 75 73 | 65 20 6f 66 20 74 68 65 | make us|e of the|
|00005e20| 20 33 32 4b 42 20 53 52 | 41 4d 20 63 61 63 68 65 | 32KB SR|AM cache|
|00005e30| 20 69 6e 20 74 68 65 20 | 44 75 6f 20 44 6f 63 6b | in the |Duo Dock|
|00005e40| 20 49 49 2e 0d 42 75 73 | 20 54 72 61 6e 73 6c 61 | II..Bus| Transla|
|00005e50| 74 6f 72 20 49 43 0d 0d | 41 20 63 75 73 74 6f 6d |tor IC..|A custom|
|00005e60| 20 49 43 20 63 61 6c 6c | 65 64 20 74 68 65 20 4d | IC call|ed the M|
|00005e70| 42 54 20 28 6d 69 63 72 | 6f 70 72 6f 63 65 73 73 |BT (micr|oprocess|
|00005e80| 6f 72 20 62 75 73 20 74 | 72 61 6e 73 6c 61 74 6f |or bus t|ranslato|
|00005e90| 72 29 20 70 72 6f 76 69 | 64 65 73 20 74 68 65 20 |r) provi|des the |
|00005ea0| 74 72 61 6e 73 6c 61 74 | 69 6f 6e 20 6e 65 63 65 |translat|ion nece|
|00005eb0| 73 73 61 72 79 20 66 6f | 72 20 74 68 65 20 4d 43 |ssary fo|r the MC|
|00005ec0| 36 38 4c 43 30 34 30 20 | 74 6f 20 77 6f 72 6b 20 |68LC040 |to work |
|00005ed0| 77 69 74 68 20 64 65 76 | 69 63 65 73 20 64 65 73 |with dev|ices des|
|00005ee0| 69 67 6e 65 64 20 66 6f | 72 20 74 68 65 20 4d 43 |igned fo|r the MC|
|00005ef0| 36 38 30 33 30 2e 20 54 | 68 65 20 4d 42 54 20 74 |68030. T|he MBT t|
|00005f00| 72 61 6e 73 6c 61 74 65 | 73 20 61 6c 6c 20 4d 43 |ranslate|s all MC|
|00005f10| 36 38 30 34 30 20 63 79 | 63 6c 65 73 20 65 78 63 |68040 cy|cles exc|
|00005f20| 65 70 74 20 61 63 6b 6e | 6f 77 6c 65 64 67 65 20 |ept ackn|owledge |
|00005f30| 63 79 63 6c 65 73 20 74 | 6f 20 4d 43 36 38 30 33 |cycles t|o MC6803|
|00005f40| 30 20 63 79 63 6c 65 73 | 2e 20 0d 42 65 63 61 75 |0 cycles|. .Becau|
|00005f50| 73 65 20 74 68 65 20 4d | 43 36 38 4c 43 30 34 30 |se the M|C68LC040|
|00005f60| 20 64 6f 65 73 20 6e 6f | 74 20 73 75 70 70 6f 72 | does no|t suppor|
|00005f70| 74 20 64 79 6e 61 6d 69 | 63 20 62 75 73 20 73 69 |t dynami|c bus si|
|00005f80| 7a 69 6e 67 20 61 73 20 | 74 68 65 20 4d 43 36 38 |zing as |the MC68|
|00005f90| 30 33 30 20 64 69 64 2c | 20 74 68 65 20 4d 42 54 |030 did,| the MBT|
|00005fa0| 20 67 65 6e 65 72 61 74 | 65 73 20 74 68 65 20 6d | generat|es the m|
|00005fb0| 75 6c 74 69 70 6c 65 20 | 4d 43 36 38 30 33 30 20 |ultiple |MC68030 |
|00005fc0| 63 79 63 6c 65 73 20 6e | 65 65 64 65 64 20 74 6f |cycles n|eeded to|
|00005fd0| 20 6f 62 74 61 69 6e 20 | 6c 6f 6e 67 77 6f 72 64 | obtain |longword|
|00005fe0| 20 64 61 74 61 20 66 72 | 6f 6d 20 62 79 74 65 20 | data fr|om byte |
|00005ff0| 61 6e 64 20 77 6f 72 64 | 20 64 65 76 69 63 65 73 |and word| devices|
|00006000| 2e 20 46 6f 72 20 62 79 | 74 65 20 61 6e 64 20 77 |. For by|te and w|
|00006010| 6f 72 64 20 72 65 61 64 | 73 2c 20 74 68 65 20 4d |ord read|s, the M|
|00006020| 43 36 38 4c 43 30 34 30 | 20 6f 62 74 61 69 6e 73 |C68LC040| obtains|
|00006030| 20 74 68 65 20 64 61 74 | 61 20 69 6e 20 74 68 65 | the dat|a in the|
|00006040| 20 61 70 70 72 6f 70 72 | 69 61 74 65 20 62 79 74 | appropr|iate byt|
|00006050| 65 20 6c 61 6e 65 73 20 | 62 61 73 65 64 20 6f 6e |e lanes |based on|
|00006060| 20 74 68 65 20 6c 6f 77 | 2d 6f 72 64 65 72 20 61 | the low|-order a|
|00006070| 64 64 72 65 73 73 20 6c | 69 6e 65 73 2e 20 54 68 |ddress l|ines. Th|
|00006080| 65 20 4d 42 54 20 6d 61 | 70 73 20 74 68 65 20 4d |e MBT ma|ps the M|
|00006090| 43 36 38 30 33 30 20 72 | 65 61 64 20 64 61 74 61 |C68030 r|ead data|
|000060a0| 20 66 72 6f 6d 20 74 68 | 65 20 68 69 67 68 20 62 | from th|e high b|
|000060b0| 79 74 65 20 6c 61 6e 65 | 73 20 74 6f 20 74 68 65 |yte lane|s to the|
|000060c0| 20 63 6f 72 72 65 63 74 | 20 62 79 74 65 20 6c 61 | correct| byte la|
|000060d0| 6e 65 73 2e 20 46 6f 72 | 20 77 72 69 74 65 20 6f |nes. For| write o|
|000060e0| 70 65 72 61 74 69 6f 6e | 73 2c 20 74 68 65 20 4d |peration|s, the M|
|000060f0| 42 54 20 70 65 72 66 6f | 72 6d 73 20 74 68 65 20 |BT perfo|rms the |
|00006100| 62 79 74 65 20 73 6d 65 | 61 72 69 6e 67 20 6e 65 |byte sme|aring ne|
|00006110| 65 64 65 64 20 66 6f 72 | 20 62 79 74 65 20 61 6e |eded for| byte an|
|00006120| 64 20 77 6f 72 64 20 6f | 70 65 72 61 74 69 6f 6e |d word o|peration|
|00006130| 73 2e 0d 54 68 65 20 4d | 42 54 20 68 61 6e 64 6c |s..The M|BT handl|
|00006140| 65 73 20 72 65 74 72 79 | 20 72 65 71 75 65 73 74 |es retry| request|
|00006150| 73 20 77 69 74 68 6f 75 | 74 20 69 6e 76 6f 6c 76 |s withou|t involv|
|00006160| 69 6e 67 20 74 68 65 20 | 4d 43 36 38 4c 43 30 34 |ing the |MC68LC04|
|00006170| 30 2e 20 49 74 20 61 6c | 73 6f 20 70 65 72 66 6f |0. It al|so perfo|
|00006180| 72 6d 73 20 72 65 6c 69 | 6e 71 75 69 73 68 20 61 |rms reli|nquish a|
|00006190| 6e 64 20 72 65 74 72 79 | 20 6f 70 65 72 61 74 69 |nd retry| operati|
|000061a0| 6f 6e 73 20 74 6f 20 70 | 72 65 76 65 6e 74 20 73 |ons to p|revent s|
|000061b0| 74 61 6c 65 6d 61 74 65 | 20 63 6f 6e 64 69 74 69 |talemate| conditi|
|000061c0| 6f 6e 73 20 74 68 61 74 | 20 6d 69 67 68 74 20 61 |ons that| might a|
|000061d0| 72 69 73 65 20 77 69 74 | 68 20 61 6c 74 65 72 6e |rise wit|h altern|
|000061e0| 61 74 65 20 62 75 73 20 | 6d 61 73 74 65 72 73 2e |ate bus |masters.|
|000061f0| 20 0d 54 68 65 20 4d 43 | 36 38 4c 43 30 34 30 20 | .The MC|68LC040 |
|00006200| 73 75 70 70 6f 72 74 73 | 20 62 75 72 73 74 20 6d |supports| burst m|
|00006210| 6f 64 65 20 6f 6e 20 62 | 6f 74 68 20 72 65 61 64 |ode on b|oth read|
|00006220| 20 61 6e 64 20 77 72 69 | 74 65 20 6f 70 65 72 61 | and wri|te opera|
|00006230| 74 69 6f 6e 73 2e 20 54 | 68 65 20 4d 42 54 20 73 |tions. T|he MBT s|
|00006240| 75 70 70 6f 72 74 73 20 | 62 75 72 73 74 2d 6d 6f |upports |burst-mo|
|00006250| 64 65 20 77 72 69 74 65 | 20 6f 70 65 72 61 74 69 |de write| operati|
|00006260| 6f 6e 73 20 74 6f 20 74 | 68 65 20 66 69 72 73 74 |ons to t|he first|
|00006270| 20 36 34 20 4d 42 20 6f | 66 20 52 41 4d 20 62 65 | 64 MB o|f RAM be|
|00006280| 63 61 75 73 65 20 74 68 | 65 20 4d 53 43 20 61 63 |cause th|e MSC ac|
|00006290| 6b 6e 6f 77 6c 65 64 67 | 65 73 20 74 68 61 74 20 |knowledg|es that |
|000062a0| 61 64 64 72 65 73 73 20 | 73 70 61 63 65 20 61 6e |address |space an|
|000062b0| 64 20 73 75 70 70 6f 72 | 74 73 20 62 75 72 73 74 |d suppor|ts burst|
|000062c0| 2d 6d 6f 64 65 20 77 72 | 69 74 65 73 2e 20 4f 6e |-mode wr|ites. On|
|000062d0| 20 74 68 65 20 6f 74 68 | 65 72 20 68 61 6e 64 2c | the oth|er hand,|
|000062e0| 20 74 68 65 20 4d 43 36 | 38 30 33 30 20 64 69 64 | the MC6|8030 did|
|000062f0| 20 6e 6f 74 20 73 75 70 | 70 6f 72 74 20 62 75 72 | not sup|port bur|
|00006300| 73 74 2d 6d 6f 64 65 20 | 77 72 69 74 65 73 2c 20 |st-mode |writes, |
|00006310| 73 6f 20 64 65 76 69 63 | 65 73 20 64 65 73 69 67 |so devic|es desig|
|00006320| 6e 65 64 20 66 6f 72 20 | 74 68 65 20 4d 43 36 38 |ned for |the MC68|
|00006330| 30 33 30 20 62 75 73 20 | 6d 61 79 20 6e 6f 74 20 |030 bus |may not |
|00006340| 68 61 6e 64 6c 65 20 74 | 68 65 20 2f 43 42 52 45 |handle t|he /CBRE|
|00006350| 51 20 73 69 67 6e 61 6c | 20 6f 6e 20 77 72 69 74 |Q signal| on writ|
|00006360| 65 20 6f 70 65 72 61 74 | 69 6f 6e 73 2e 20 54 6f |e operat|ions. To|
|00006370| 20 61 76 6f 69 64 20 70 | 6f 74 65 6e 74 69 61 6c | avoid p|otential|
|00006380| 20 70 72 6f 62 6c 65 6d | 73 20 77 69 74 68 20 73 | problem|s with s|
|00006390| 75 63 68 20 64 65 76 69 | 63 65 73 2c 20 74 68 65 |uch devi|ces, the|
|000063a0| 20 4d 42 54 20 62 6c 6f | 63 6b 73 20 62 75 72 73 | MBT blo|cks burs|
|000063b0| 74 20 77 72 69 74 65 73 | 20 74 6f 20 6c 6f 63 61 |t writes| to loca|
|000063c0| 74 69 6f 6e 73 20 6f 74 | 68 65 72 20 74 68 61 6e |tions ot|her than|
|000063d0| 20 52 41 4d 2e 20 0d 42 | 75 72 73 74 20 63 79 63 | RAM. .B|urst cyc|
|000063e0| 6c 65 73 20 6d 75 73 74 | 20 77 72 61 70 20 74 6f |les must| wrap to|
|000063f0| 20 61 64 64 72 65 73 73 | 20 66 6f 75 72 20 6c 6f | address| four lo|
+--------+-------------------------+-------------------------+--------+--------+
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