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+--------+-------------------------+-------------------------+--------+--------+
|00000000| 00 1b 48 57 32 35 20 4d | 61 63 20 4d 65 6d 20 43 |..HW25 M|ac Mem C|
|00000010| 6f 6e 66 69 67 75 72 61 | 74 69 6f 6e 73 00 00 00 |onfigura|tions...|
|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 0a 51 83 00 | 00 11 d5 aa c9 6e 1a aa |.....Q..|.....n..|
|00000060| ca ba 3b 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 a7 d2 00 00 |........|........|
|00000080| 48 57 20 32 35 20 2d 20 | 4d 61 63 69 6e 74 6f 73 |HW 25 - |Macintos|
|00000090| 68 20 4d 65 6d 6f 72 79 | 20 43 6f 6e 66 69 67 75 |h Memory| Configu|
|000000a0| 72 61 74 69 6f 6e 73 0d | 48 61 72 64 77 61 72 65 |rations.|Hardware|
|000000b0| 09 0d 52 65 76 69 73 65 | 64 20 62 79 3a 09 4a 61 |..Revise|d by:.Ja|
|000000c0| 63 6b 20 52 6f 62 73 6f | 6e 09 41 70 72 69 6c 20 |ck Robso|n.April |
|000000d0| 31 39 39 32 0d 50 72 69 | 6f 72 20 52 65 76 69 73 |1992.Pri|or Revis|
|000000e0| 69 6f 6e 73 3a 09 4d 61 | 72 6b 20 42 61 75 6d 77 |ions:.Ma|rk Baumw|
|000000f0| 65 6c 6c 2c 20 43 72 61 | 69 67 20 50 72 6f 75 73 |ell, Cra|ig Prous|
|00000100| 65 2c 20 61 6e 64 20 44 | 65 6e 6e 69 73 20 48 65 |e, and D|ennis He|
|00000110| 73 63 6f 78 0d 57 72 69 | 74 74 65 6e 20 62 79 3a |scox.Wri|tten by:|
|00000120| 09 43 61 6d 65 72 6f 6e | 20 42 69 72 73 65 09 4e |.Cameron| Birse.N|
|00000130| 6f 76 65 6d 62 65 72 20 | 31 39 38 37 0d 54 68 69 |ovember |1987.Thi|
|00000140| 73 20 54 65 63 68 6e 69 | 63 61 6c 20 4e 6f 74 65 |s Techni|cal Note|
|00000150| 20 64 65 73 63 72 69 62 | 65 73 20 74 68 65 20 64 | describ|es the d|
|00000160| 69 66 66 65 72 65 6e 74 | 20 70 6f 73 73 69 62 6c |ifferent| possibl|
|00000170| 65 20 6d 65 6d 6f 72 79 | 20 63 6f 6e 66 69 67 75 |e memory| configu|
|00000180| 72 61 74 69 6f 6e 73 20 | 6f 66 20 61 6c 6c 20 6d |rations |of all m|
|00000190| 6f 64 65 6c 73 20 6f 66 | 20 74 68 65 20 4d 61 63 |odels of| the Mac|
|000001a0| 69 6e 74 6f 73 68 20 66 | 61 6d 69 6c 79 20 74 68 |intosh f|amily th|
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|000001c0| 2d 6c 69 6e 65 20 4d 65 | 6d 6f 72 79 20 4d 6f 64 |-line Me|mory Mod|
|000001d0| 75 6c 65 73 20 28 53 49 | 4d 4d 73 29 20 61 73 20 |ules (SI|MMs) as |
|000001e0| 77 65 6c 6c 20 61 73 20 | 74 68 65 20 6e 6f 6e 2d |well as |the non-|
|000001f0| 53 49 4d 4d 20 6d 65 6d | 6f 72 79 20 75 70 67 72 |SIMM mem|ory upgr|
|00000200| 61 64 65 20 6f 70 74 69 | 6f 6e 73 20 6f 66 20 74 |ade opti|ons of t|
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|00000220| 74 61 62 6c 65 20 61 6e | 64 20 4d 61 63 69 6e 74 |table an|d Macint|
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|00000250| 42 72 69 61 6e 20 48 6f | 77 61 72 64 20 66 6f 72 |Brian Ho|ward for|
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|00000350| 43 6f 72 72 65 63 74 65 | 64 20 65 72 72 6f 72 20 |Correcte|d error |
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|000007f0| 6c 6c 20 77 6f 72 6b 2c | 20 6e 6f 72 20 63 61 6e |ll work,| nor can|
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|00000810| 79 20 69 6e 66 6f 72 6d | 61 74 69 6f 6e 20 69 6e |y inform|ation in|
|00000820| 20 74 68 69 73 20 54 65 | 63 68 20 4e 6f 74 65 20 | this Te|ch Note |
|00000830| 20 74 68 61 74 20 70 65 | 72 74 61 69 6e 73 20 74 | that pe|rtains t|
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|00000850| 6e 64 20 31 36 20 4d 42 | 20 53 49 4d 4d 73 20 28 |nd 16 MB| SIMMs (|
|00000860| 72 65 61 64 3a 20 75 73 | 65 20 74 68 65 6d 20 61 |read: us|e them a|
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|00000880| 2e 20 41 6c 6c 20 6e 75 | 6d 62 65 72 73 20 61 72 |. All nu|mbers ar|
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|000008a0| 65 72 6d 73 20 6f 66 20 | 6d 65 67 61 62 79 74 65 |erms of |megabyte|
|000008b0| 73 20 28 4d 42 29 20 75 | 6e 6c 65 73 73 20 6f 74 |s (MB) u|nless ot|
|000008c0| 68 65 72 77 69 73 65 20 | 6e 6f 74 65 64 2e 20 0d |herwise |noted. .|
|000008d0| 09 50 65 72 6d 61 6e 65 | 6e 74 09 4e 6f 20 6f 66 |.Permane|nt.No of|
|000008e0| 09 41 6c 6c 6f 77 61 62 | 6c 65 09 50 68 79 73 69 |.Allowab|le.Physi|
|000008f0| 63 61 6c 20 52 41 4d 09 | 52 65 71 2e 09 54 4e 0d |cal RAM.|Req..TN.|
|00000900| 09 52 41 4d 09 53 49 4d | 4d 20 73 6c 6f 74 73 09 |.RAM.SIM|M slots.|
|00000910| 53 49 4d 4d 20 73 69 7a | 65 73 09 54 6f 74 61 6c |SIMM siz|es.Total|
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|00000930| 2d 2d 2d 2d 2d 2d 2d 2d | 2d 2d 2d 2d 2d 2d 2d 2d |--------|--------|
|00000940| 2d 2d 2d 2d 2d 2d 2d 2d | 2d 2d 2d 2d 2d 2d 2d 2d |--------|--------|
|00000950| 2d 2d 2d 2d 2d 2d 2d 2d | 2d 2d 2d 2d 2d 2d 2d 2d |--------|--------|
|00000960| 2d 2d 2d 2d 2d 2d 2d 2d | 2d 2d 2d 2d 2d 2d 2d 2d |--------|--------|
|00000970| 2d 2d 2d 2d 2d 2d 2d 2d | 2d 2d 2d 2d 2d 2d 2d 2d |--------|--------|
|00000980| 2d 2d 2d 2d 2d 2d 2d 50 | 6c 75 73 09 30 09 34 09 |-------P|lus.0.4.|
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|000009a0| 32 2e 35 2c 34 09 31 35 | 30 20 6e 73 09 33 2c 34 |2.5,4.15|0 ns.3,4|
|000009b0| 0d 53 45 09 30 09 34 09 | 32 35 36 4b 2c 31 09 35 |.SE.0.4.|256K,1.5|
|000009c0| 31 32 4b 2c 31 2c 32 2c | 32 2e 35 2c 34 09 31 35 |12K,1,2,|2.5,4.15|
|000009d0| 30 20 6e 73 09 33 2c 35 | 2c 36 0d 43 6c 61 73 73 |0 ns.3,5|,6.Class|
|000009e0| 69 63 09 31 09 32 2a 09 | 32 35 36 4b 2c 31 09 31 |ic.1.2*.|256K,1.1|
|000009f0| 2c 32 2c 32 2e 35 2c 34 | 09 31 35 30 20 6e 73 09 |,2,2.5,4|.150 ns.|
|00000a00| 33 2c 38 0d 43 6c 61 73 | 73 69 63 20 49 49 e0 09 |3,8.Clas|sic II..|
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|00000a50| a0 09 31 32 30 20 6e 73 | 09 37 2c 39 0d 49 49 09 |..120 ns|.7,9.II.|
|00000a60| 30 09 38 09 32 35 36 4b | 2c 31 2c 34 2c 31 36 a0 |0.8.256K|,1,4,16.|
|00000a70| a0 09 31 2c 32 2c 34 2c | 35 2c 38 c9 36 38 a0 09 |..1,2,4,|5,8.68..|
|00000a80| 31 32 30 20 6e 73 09 37 | 2c 39 0d 49 49 78 09 30 |120 ns.7|,9.IIx.0|
|00000a90| 09 38 09 32 35 36 4b 2c | 31 2c 34 2c 31 36 09 31 |.8.256K,|1,4,16.1|
|00000aa0| 2c 32 2c 34 2c 35 2c 38 | c9 31 32 38 a0 09 31 32 |,2,4,5,8|.128..12|
|00000ab0| 30 20 6e 73 09 37 2c 39 | 0d 49 49 63 78 09 30 09 |0 ns.7,9|.IIcx.0.|
|00000ac0| 38 09 32 35 36 4b 2c 31 | 2c 34 2c 31 36 09 31 2c |8.256K,1|,4,16.1,|
|00000ad0| 32 2c 34 2c 35 2c 38 c9 | 31 32 38 a0 09 31 32 30 |2,4,5,8.|128..120|
|00000ae0| 20 6e 73 09 37 2c 31 32 | 0d 4c 43 e0 09 32 09 32 | ns.7,12|.LC..2.2|
|00000af0| 09 31 2c 32 2c 34 2c 31 | 36 09 32 2c 34 2c 36 2c |.1,2,4,1|6.2,4,6,|
|00000b00| 31 30 09 31 30 30 20 6e | 73 09 38 2c 31 30 0d 49 |10.100 n|s.8,10.I|
|00000b10| 49 73 69 e0 20 09 31 09 | 34 20 09 32 35 36 4b 2c |Isi. .1.|4 .256K,|
|00000b20| 35 31 32 4b 2c 31 2c 32 | 2c 34 2c 31 36 09 31 2c |512K,1,2|,4,16.1,|
|00000b30| 32 2c 33 2c 35 2c 39 2c | 31 37 c9 36 35 09 31 30 |2,3,5,9,|17.65.10|
|00000b40| 30 20 6e 73 09 38 2c 31 | 30 0d 49 49 63 69 e0 20 |0 ns.8,1|0.IIci. |
|00000b50| 20 09 30 20 09 38 09 32 | 35 36 4b 2c 31 2c 34 2c | .0 .8.2|56K,1,4,|
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|00000b70| 0d 09 09 09 09 31 30 2c | 31 37 2c 32 30 2c 33 32 |.....10,|17,20,32|
|00000b80| c9 31 32 38 09 38 30 20 | 6e 73 20 09 31 30 2c 31 |.128.80 |ns .10,1|
|00000b90| 32 0d 50 6f 72 74 61 62 | 6c 65 09 31 09 30 2a 2a |2.Portab|le.1.0**|
|00000ba0| 09 6e 2f 61 09 31 2c 32 | 2c 33 2c 34 2c 35 2c 36 |.n/a.1,2|,3,4,5,6|
|00000bb0| 2c 37 2c 38 2c 39 2a 2a | 2a 09 31 30 30 20 6e 73 |,7,8,9**|*.100 ns|
|00000bc0| 09 31 31 2c 31 32 0d 50 | 6f 72 74 61 62 6c 65 20 |.11,12.P|ortable |
|00000bd0| 28 62 61 63 6b 6c 69 74 | 29 09 31 09 30 2a 2a 09 |(backlit|).1.0**.|
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|00000bf0| 37 2c 38 2a 2a 2a 09 31 | 30 30 20 6e 73 09 0d 49 |7,8***.1|00 ns..I|
|00000c00| 49 66 78 e0 09 30 09 38 | 09 31 2c 34 2c 31 36 09 |Ifx..0.8|.1,4,16.|
|00000c10| 34 2c 38 2c 31 36 2c 32 | 30 2c 33 32 c9 31 32 38 |4,8,16,2|0,32.128|
|00000c20| 09 38 30 20 6e 73 09 31 | 33 2c 31 34 0d 51 75 61 |.80 ns.1|3,14.Qua|
|00000c30| 64 72 61 20 37 30 30 e0 | 09 34 09 34 09 31 2c 34 |dra 700.|.4.4.1,4|
|00000c40| 2c 31 36 09 34 2c 38 2c | 32 30 c9 36 38 09 38 30 |,16.4,8,|20.68.80|
|00000c50| 20 6e 73 09 31 36 0d 51 | 75 61 64 72 61 20 39 30 | ns.16.Q|uadra 90|
|00000c60| 30 e0 09 30 09 31 36 20 | 09 31 2c 34 2c 31 36 09 |0..0.16 |.1,4,16.|
|00000c70| 34 2c 38 2c 31 32 2c 31 | 36 2c 32 30 2c 0d 09 09 |4,8,12,1|6,20,...|
|00000c80| 09 09 32 34 2c 32 38 2c | 33 32 2c 33 36 2c 0d 09 |..24,28,|32,36,..|
|00000c90| 09 09 09 34 30 2c 34 38 | 2c 35 32 2c 36 34 c9 32 |...40,48|,52,64.2|
|00000ca0| 35 36 09 38 30 20 6e 73 | 09 31 35 0d 50 6f 77 65 |56.80 ns|.15.Powe|
|00000cb0| 72 42 6f 6f 6b 20 31 30 | 30 09 32 09 30 2a 2a 09 |rBook 10|0.2.0**.|
|00000cc0| 6e 2f 61 09 32 2c 34 2c | 36 2c 38 09 6e 2f 61 09 |n/a.2,4,|6,8.n/a.|
|00000cd0| 31 39 0d 50 6f 77 65 72 | 42 6f 6f 6b 20 31 34 30 |19.Power|Book 140|
|00000ce0| e0 09 32 09 30 2a 2a 09 | 6e 2f 61 09 32 2c 34 2c |..2.0**.|n/a.2,4,|
|00000cf0| 36 2c 38 09 6e 2f 61 09 | 31 38 0d 50 6f 77 65 72 |6,8.n/a.|18.Power|
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|00000d10| 6e 2f 61 09 32 2c 34 2c | 36 2c 38 09 6e 2f 61 09 |n/a.2,4,|6,8.n/a.|
|00000d20| 31 38 0d 2a 54 68 65 20 | 4d 61 63 69 6e 74 6f 73 |18.*The |Macintos|
|00000d30| 68 20 43 6c 61 73 73 69 | 63 20 68 61 73 20 31 20 |h Classi|c has 1 |
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|00000d50| 65 64 20 6f 6e 74 6f 20 | 74 68 65 20 6d 6f 74 68 |ed onto |the moth|
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|00001b50| d2 53 49 4d 4d 20 49 4e | 53 54 41 4c 4c 45 44 d3 |.SIMM IN|STALLED.|
|00001b60| 0d 57 68 65 6e 20 61 64 | 64 69 6e 67 20 53 49 4d |.When ad|ding SIM|
|00001b70| 4d 73 20 74 6f 20 74 68 | 65 20 6d 65 6d 6f 72 79 |Ms to th|e memory|
|00001b80| 20 65 78 70 61 6e 73 69 | 6f 6e 20 63 61 72 64 2c | expansi|on card,|
|00001b90| 20 75 73 65 20 65 69 74 | 68 65 72 20 74 77 6f 20 | use eit|her two |
|00001ba0| 32 35 36 20 4b 62 69 74 | 20 6f 72 20 74 77 6f 20 |256 Kbit| or two |
|00001bb0| 31 20 4d 62 69 74 20 70 | 61 72 74 73 20 72 61 74 |1 Mbit p|arts rat|
|00001bc0| 65 64 20 61 74 20 31 32 | 30 20 6e 73 20 6f 72 20 |ed at 12|0 ns or |
|00001bd0| 66 61 73 74 65 72 2e 0d | 46 69 67 75 72 65 20 31 |faster..|Figure 1|
|00001be0| 20 2d 20 4d 61 63 69 6e | 74 6f 73 68 20 50 6c 75 | - Macin|tosh Plu|
|00001bf0| 73 20 4d 65 6d 6f 72 79 | 20 43 6f 6e 66 69 67 75 |s Memory| Configu|
|00001c00| 72 61 74 69 6f 6e 73 0d | 46 69 67 75 72 65 20 32 |rations.|Figure 2|
|00001c10| 20 d0 20 4d 61 63 69 6e | 74 6f 73 68 20 53 45 20 | . Macin|tosh SE |
|00001c20| 4d 65 6d 6f 72 79 20 43 | 6f 6e 66 69 67 75 72 61 |Memory C|onfigura|
|00001c30| 74 69 6f 6e 73 0d 46 69 | 67 75 72 65 20 33 20 2d |tions.Fi|gure 3 -|
|00001c40| 20 4d 61 63 69 6e 74 6f | 73 68 20 53 45 20 28 77 | Macinto|sh SE (w|
|00001c50| 69 74 68 20 6a 75 6d 70 | 65 72 29 20 4d 65 6d 6f |ith jump|er) Memo|
|00001c60| 72 79 20 43 6f 6e 66 69 | 67 75 72 61 74 69 6f 6e |ry Confi|guration|
|00001c70| 73 0d 4d 61 63 69 6e 74 | 6f 73 68 20 53 45 2f 33 |s.Macint|osh SE/3|
|00001c80| 30 2c 20 49 49 2c 20 49 | 49 78 2c 20 61 6e 64 20 |0, II, I|Ix, and |
|00001c90| 49 49 63 78 0d 53 69 6e | 63 65 20 74 68 65 73 65 |IIcx.Sin|ce these|
|00001ca0| 20 6d 61 63 68 69 6e 65 | 73 20 75 73 65 20 61 20 | machine|s use a |
|00001cb0| 33 32 2d 62 69 74 20 64 | 61 74 61 20 62 75 73 20 |32-bit d|ata bus |
|00001cc0| 77 69 74 68 20 65 69 67 | 68 74 2d 62 69 74 20 53 |with eig|ht-bit S|
|00001cd0| 49 4d 4d 73 2c 20 79 6f | 75 20 6d 75 73 74 20 61 |IMMs, yo|u must a|
|00001ce0| 6c 77 61 79 73 20 75 70 | 67 72 61 64 65 20 6d 65 |lways up|grade me|
|00001cf0| 6d 6f 72 79 20 69 6e 20 | 66 6f 75 72 20 53 49 4d |mory in |four SIM|
|00001d00| 4d 20 63 68 75 6e 6b 73 | 2e 20 54 68 65 20 65 69 |M chunks|. The ei|
|00001d10| 67 68 74 20 53 49 4d 4d | 20 63 6f 6e 6e 65 63 74 |ght SIMM| connect|
|00001d20| 6f 72 73 20 61 72 65 20 | 64 69 76 69 64 65 64 20 |ors are |divided |
|00001d30| 69 6e 74 6f 20 74 77 6f | 20 62 61 6e 6b 73 20 6f |into two| banks o|
|00001d40| 66 20 66 6f 75 72 20 53 | 49 4d 4d 20 73 6c 6f 74 |f four S|IMM slot|
|00001d50| 73 2c 20 42 61 6e 6b 20 | 41 20 61 6e 64 20 42 61 |s, Bank |A and Ba|
|00001d60| 6e 6b 20 42 2e 0d 4f 6e | 20 74 68 65 20 4d 61 63 |nk B..On| the Mac|
|00001d70| 69 6e 74 6f 73 68 20 53 | 45 2f 33 30 2c 20 42 61 |intosh S|E/30, Ba|
|00001d80| 6e 6b 20 41 20 69 73 20 | 6c 6f 63 61 74 65 64 20 |nk A is |located |
|00001d90| 6e 65 78 74 20 74 6f 20 | 74 68 65 20 52 4f 4d 20 |next to |the ROM |
|00001da0| 53 49 4d 4d 20 77 68 69 | 6c 65 20 42 61 6e 6b 20 |SIMM whi|le Bank |
|00001db0| 42 20 69 73 20 6e 65 78 | 74 20 74 6f 20 74 68 65 |B is nex|t to the|
|00001dc0| 20 36 38 38 38 32 20 63 | 6f 70 72 6f 63 65 73 73 | 68882 c|oprocess|
|00001dd0| 6f 72 2e 20 4f 6e 20 74 | 68 65 20 4d 61 63 69 6e |or. On t|he Macin|
|00001de0| 74 6f 73 68 20 49 49 20 | 61 6e 64 20 49 49 78 2c |tosh II |and IIx,|
|00001df0| 20 42 61 6e 6b 20 41 20 | 69 73 20 74 68 65 20 62 | Bank A |is the b|
|00001e00| 61 6e 6b 20 63 6c 6f 73 | 65 73 74 20 74 6f 20 74 |ank clos|est to t|
|00001e10| 68 65 20 65 64 67 65 20 | 6f 66 20 74 68 65 20 62 |he edge |of the b|
|00001e20| 6f 61 72 64 2c 20 77 68 | 69 6c 65 20 6f 6e 20 74 |oard, wh|ile on t|
|00001e30| 68 65 20 4d 61 63 69 6e | 74 6f 73 68 20 49 49 63 |he Macin|tosh IIc|
|00001e40| 78 2c 20 42 61 6e 6b 20 | 41 20 69 73 20 74 68 65 |x, Bank |A is the|
|00001e50| 20 62 61 6e 6b 20 63 6c | 6f 73 65 73 74 20 74 6f | bank cl|osest to|
|00001e60| 20 74 68 65 20 64 69 73 | 6b 20 64 72 69 76 65 73 | the dis|k drives|
|00001e70| 20 61 6e 64 20 70 6f 77 | 65 72 20 73 75 70 70 6c | and pow|er suppl|
|00001e80| 79 2e 20 52 65 66 65 72 | 20 74 6f 20 46 69 67 75 |y. Refer| to Figu|
|00001e90| 72 65 20 35 20 66 6f 72 | 20 74 68 65 20 70 72 6f |re 5 for| the pro|
|00001ea0| 70 65 72 20 6c 6f 63 61 | 74 69 6f 6e 73 20 6f 66 |per loca|tions of|
|00001eb0| 20 42 61 6e 6b 73 20 41 | 20 61 6e 64 20 42 20 6f | Banks A| and B o|
|00001ec0| 6e 20 74 68 65 20 53 45 | 2f 33 30 2c 20 49 49 2c |n the SE|/30, II,|
|00001ed0| 20 61 6e 64 20 49 49 78 | 2c 20 61 6e 64 20 72 65 | and IIx|, and re|
|00001ee0| 66 65 72 20 74 6f 20 46 | 69 67 75 72 65 20 36 20 |fer to F|igure 6 |
|00001ef0| 66 6f 72 20 74 68 65 20 | 70 72 6f 70 65 72 20 6c |for the |proper l|
|00001f00| 6f 63 61 74 69 6f 6e 73 | 20 6f 6e 20 74 68 65 20 |ocations| on the |
|00001f10| 49 49 63 78 2e 0d 55 6e | 6c 69 6b 65 20 74 68 65 |IIcx..Un|like the|
|00001f20| 20 4d 61 63 69 6e 74 6f | 73 68 20 50 6c 75 73 20 | Macinto|sh Plus |
|00001f30| 61 6e 64 20 74 68 65 20 | 4d 61 63 69 6e 74 6f 73 |and the |Macintos|
|00001f40| 68 20 53 45 2c 20 74 68 | 65 20 4d 61 63 69 6e 74 |h SE, th|e Macint|
|00001f50| 6f 73 68 20 49 49 20 61 | 6e 64 20 49 49 78 20 68 |osh II a|nd IIx h|
|00001f60| 61 76 65 20 6e 6f 20 72 | 65 73 69 73 74 6f 72 73 |ave no r|esistors|
|00001f70| 20 74 6f 20 63 75 74 20 | 61 6e 64 20 6e 6f 20 6a | to cut |and no j|
|00001f80| 75 6d 70 65 72 73 20 74 | 6f 20 73 65 74 3b 20 79 |umpers t|o set; y|
|00001f90| 6f 75 20 6e 65 65 64 20 | 6f 6e 6c 79 20 69 6e 73 |ou need |only ins|
|00001fa0| 74 61 6c 6c 20 74 68 65 | 20 53 49 4d 4d 53 20 69 |tall the| SIMMS i|
|00001fb0| 6e 20 74 68 65 20 63 6f | 72 72 65 63 74 20 62 61 |n the co|rrect ba|
|00001fc0| 6e 6b 73 20 61 6e 64 20 | 79 6f 75 d5 6c 6c 20 62 |nks and |you.ll b|
|00001fd0| 65 20 75 70 20 61 6e 64 | 20 72 75 6e 6e 69 6e 67 |e up and| running|
|00001fe0| 2e 20 59 6f 75 20 63 61 | 6e 20 69 6d 70 6c 65 6d |. You ca|n implem|
|00001ff0| 65 6e 74 20 74 68 65 20 | 66 6f 6c 6c 6f 77 69 6e |ent the |followin|
|00002000| 67 20 63 6f 6e 66 69 67 | 75 72 61 74 69 6f 6e 73 |g config|urations|
|00002010| 3a 0d 09 31 20 4d 42 2c | 20 75 73 69 6e 67 20 66 |:..1 MB,| using f|
|00002020| 6f 75 72 20 32 35 36 20 | 4b 62 69 74 20 53 49 4d |our 256 |Kbit SIM|
|00002030| 4d 73 20 69 6e 20 42 61 | 6e 6b 20 41 0d 09 32 20 |Ms in Ba|nk A..2 |
|00002040| 4d 42 2c 20 75 73 69 6e | 67 20 65 69 67 68 74 20 |MB, usin|g eight |
|00002050| 32 35 36 20 4b 62 69 74 | 20 53 49 4d 4d 73 20 69 |256 Kbit| SIMMs i|
|00002060| 6e 20 42 61 6e 6b 73 20 | 41 20 61 6e 64 20 42 0d |n Banks |A and B.|
|00002070| 09 34 20 4d 42 2c 20 75 | 73 69 6e 67 20 66 6f 75 |.4 MB, u|sing fou|
|00002080| 72 20 31 20 4d 62 69 74 | 20 53 49 4d 4d 73 20 69 |r 1 Mbit| SIMMs i|
|00002090| 6e 20 42 61 6e 6b 20 41 | 0d 09 35 20 4d 42 2c 20 |n Bank A|..5 MB, |
|000020a0| 75 73 69 6e 67 20 66 6f | 75 72 20 31 20 4d 62 69 |using fo|ur 1 Mbi|
|000020b0| 74 20 53 49 4d 4d 73 20 | 69 6e 20 42 61 6e 6b 20 |t SIMMs |in Bank |
|000020c0| 41 20 61 6e 64 20 66 6f | 75 72 20 32 35 36 20 4b |A and fo|ur 256 K|
|000020d0| 62 69 74 20 53 49 4d 4d | 73 20 69 6e 20 42 61 6e |bit SIMM|s in Ban|
|000020e0| 6b 20 42 0d 09 38 20 4d | 42 2c 20 75 73 69 6e 67 |k B..8 M|B, using|
|000020f0| 20 65 69 67 68 74 20 31 | 20 4d 62 69 74 20 53 49 | eight 1| Mbit SI|
|00002100| 4d 4d 73 20 69 6e 20 42 | 61 6e 6b 73 20 41 20 61 |MMs in B|anks A a|
|00002110| 6e 64 20 42 0d 09 3e 38 | 20 4d 42 3a 20 73 65 65 |nd B..>8| MB: see|
|00002120| 20 74 68 65 20 33 32 2d | 62 69 74 20 61 64 64 72 | the 32-|bit addr|
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|00002150| 69 74 20 69 73 20 69 6d | 70 6f 72 74 61 6e 74 20 |it is im|portant |
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|00002180| 73 20 61 72 65 20 69 6e | 20 74 68 65 20 72 69 67 |s are in| the rig|
|00002190| 68 74 20 42 61 6e 6b 3b | 20 77 68 65 6e 20 79 6f |ht Bank;| when yo|
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|000021c0| 4d 73 2c 20 74 68 65 20 | 6c 61 72 67 65 72 20 53 |Ms, the |larger S|
|000021d0| 49 4d 4d 73 20 28 69 6e | 20 74 65 72 6d 73 20 6f |IMMs (in| terms o|
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|00002200| 6e 6b 20 41 20 28 73 65 | 65 20 74 68 65 20 65 78 |nk A (se|e the ex|
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|00002220| 57 68 65 6e 20 79 6f 75 | 20 61 72 65 20 75 73 69 |When you| are usi|
|00002230| 6e 67 20 6f 6e 6c 79 20 | 66 6f 75 72 20 53 49 4d |ng only |four SIM|
|00002240| 4d 73 2c 20 74 68 65 79 | 20 6d 75 73 74 20 62 65 |Ms, they| must be|
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|00002260| 6c 6c 2e 20 0d 33 32 2d | 42 69 74 20 41 64 64 72 |ll. .32-|Bit Addr|
|00002270| 65 73 73 69 6e 67 20 57 | 69 74 68 20 74 68 65 20 |essing W|ith the |
|00002280| 4d 61 63 69 6e 74 6f 73 | 68 20 53 45 2f 33 30 2c |Macintos|h SE/30,|
|00002290| 20 49 49 2c 20 49 49 78 | 2c 20 61 6e 64 20 49 49 | II, IIx|, and II|
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|00002550| 0d 44 75 65 20 74 6f 20 | 61 6e 20 75 6e 64 6f 63 |.Due to |an undoc|
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|00002570| 69 6e 20 74 68 65 20 52 | 4f 4d 20 66 69 72 6d 77 |in the R|OM firmw|
|00002580| 61 72 65 20 73 68 69 70 | 70 65 64 20 77 69 74 68 |are ship|ped with|
|00002590| 20 74 68 65 20 6f 72 69 | 67 69 6e 61 6c 20 4d 61 | the ori|ginal Ma|
|000025a0| 63 69 6e 74 6f 73 68 20 | 49 49 2c 20 61 20 4d 61 |cintosh |II, a Ma|
|000025b0| 63 69 6e 74 6f 73 68 20 | 49 49 20 77 69 74 68 20 |cintosh |II with |
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|000025f0| 72 20 74 68 61 6e 20 31 | 20 4d 42 20 69 6e 20 42 |r than 1| MB in B|
|00002600| 61 6e 6b 20 41 2e 20 4c | 61 72 67 65 20 53 49 4d |ank A. L|arge SIM|
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|00002620| 75 74 20 69 6e 20 42 61 | 6e 6b 20 42 20 28 74 68 |ut in Ba|nk B (th|
|00002630| 61 74 20 69 73 2c 20 34 | 20 61 6e 64 20 31 36 20 |at is, 4| and 16 |
|00002640| 4d 42 20 53 49 4d 4d 73 | 29 2e 20 52 65 6d 65 6d |MB SIMMs|). Remem|
|00002650| 62 65 72 20 74 68 61 74 | 20 69 66 20 42 61 6e 6b |ber that| if Bank|
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|00002690| 64 20 66 69 72 73 74 2e | 20 41 73 20 61 20 72 65 |d first.| As a re|
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|00002720| 4d 73 20 69 6e 20 42 61 | 6e 6b 20 42 20 69 73 20 |Ms in Ba|nk B is |
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|00002790| 73 65 74 20 6f 66 20 4d | 61 63 69 6e 74 6f 73 68 |set of M|acintosh|
|000027a0| 20 49 49 78 20 52 4f 4d | 73 2e 20 54 68 65 20 4d | IIx ROM|s. The M|
|000027b0| 61 63 69 6e 74 6f 73 68 | 20 49 49 78 20 52 4f 4d |acintosh| IIx ROM|
|000027c0| 73 20 63 61 6e 20 68 61 | 6e 64 6c 65 20 34 20 4d |s can ha|ndle 4 M|
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|00002810| 6f 6c 64 20 49 57 4d 2e | 20 0d 54 68 65 20 74 68 |old IWM.| .The th|
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|00002840| 4d 61 63 69 6e 74 6f 73 | 68 20 53 45 2f 33 30 2c |Macintos|h SE/30,|
|00002850| 20 49 49 78 2c 20 49 49 | 63 78 20 28 61 6e 64 20 | IIx, II|cx (and |
|00002860| 49 49 20 77 69 74 68 20 | 49 49 78 20 52 4f 4d 73 |II with |IIx ROMs|
|00002870| 29 20 63 61 6e 20 61 64 | 64 72 65 73 73 20 69 73 |) can ad|dress is|
|00002880| 20 31 32 38 20 4d 42 20 | 75 73 69 6e 67 20 31 36 | 128 MB |using 16|
|00002890| 20 4d 42 20 53 49 4d 4d | 73 2e 20 0d 50 6c 65 61 | MB SIMM|s. .Plea|
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|000028d0| 68 20 74 68 65 20 4d 61 | 63 69 6e 74 6f 73 68 20 |h the Ma|cintosh |
|000028e0| 68 61 72 64 77 61 72 65 | 20 6c 69 6e 65 20 68 61 |hardware| line ha|
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|00002930| 63 6f 6e 73 69 64 65 72 | 61 74 69 6f 6e 20 61 6e |consider|ation an|
|00002940| 64 20 73 68 6f 75 6c 64 | 20 62 65 20 63 6f 6e 73 |d should| be cons|
|00002950| 69 64 65 72 65 64 20 74 | 68 65 6f 72 65 74 69 63 |idered t|heoretic|
|00002960| 61 6c 20 75 6e 74 69 6c | 20 77 65 20 68 61 76 65 |al until| we have|
|00002970| 20 62 65 65 6e 20 61 62 | 6c 65 20 74 6f 20 66 75 | been ab|le to fu|
|00002980| 72 74 68 65 72 20 74 65 | 73 74 20 61 6c 6c 20 6f |rther te|st all o|
|00002990| 66 20 74 68 65 73 65 20 | 70 6f 73 73 69 62 6c 65 |f these |possible|
|000029a0| 20 63 6f 6e 66 69 67 75 | 72 61 74 69 6f 6e 73 2e | configu|rations.|
|000029b0| 0d 46 69 67 75 72 65 20 | 34 20 2d 20 4d 61 63 69 |.Figure |4 - Maci|
|000029c0| 6e 74 6f 73 68 20 43 6c | 61 73 73 69 63 2c 20 4c |ntosh Cl|assic, L|
|000029d0| 43 20 61 6e 64 20 49 49 | 73 69 0d 46 69 67 75 72 |C and II|si.Figur|
|000029e0| 65 20 35 20 2d 20 4d 61 | 63 69 6e 74 6f 73 68 20 |e 5 - Ma|cintosh |
|000029f0| 53 45 2f 33 30 2c 20 49 | 49 2c 20 61 6e 64 20 49 |SE/30, I|I, and I|
|00002a00| 49 78 20 4d 65 6d 6f 72 | 79 20 43 6f 6e 66 69 67 |Ix Memor|y Config|
|00002a10| 75 72 61 74 69 6f 6e 20 | 0d 4d 61 63 69 6e 74 6f |uration |.Macinto|
|00002a20| 73 68 20 4c 43 0d 54 68 | 65 20 4d 61 63 69 6e 74 |sh LC.Th|e Macint|
|00002a30| 6f 73 68 20 4c 43 20 75 | 73 65 73 20 61 20 31 36 |osh LC u|ses a 16|
|00002a40| 2d 62 69 74 20 64 61 74 | 61 20 62 75 73 20 77 69 |-bit dat|a bus wi|
|00002a50| 74 68 20 38 2d 62 69 74 | 20 53 49 4d 4d 73 2c 20 |th 8-bit| SIMMs, |
|00002a60| 73 6f 20 75 70 67 72 61 | 64 65 73 20 6d 75 73 74 |so upgra|des must|
|00002a70| 20 61 6c 77 61 79 73 20 | 62 65 20 70 65 72 66 6f | always |be perfo|
|00002a80| 72 6d 65 64 20 74 77 6f | 20 53 49 4d 4d 73 20 61 |rmed two| SIMMs a|
|00002a90| 74 20 61 20 74 69 6d 65 | 2e 20 54 68 65 20 4c 43 |t a time|. The LC|
|00002aa0| 20 68 61 73 20 74 77 6f | 20 53 49 4d 4d 20 63 6f | has two| SIMM co|
|00002ab0| 6e 6e 65 63 74 6f 72 73 | 20 74 68 61 74 20 61 72 |nnectors| that ar|
|00002ac0| 65 20 75 73 65 64 20 61 | 73 20 61 20 73 69 6e 67 |e used a|s a sing|
|00002ad0| 6c 65 20 61 64 64 69 74 | 69 6f 6e 61 6c 20 52 41 |le addit|ional RA|
|00002ae0| 4d 20 62 61 6e 6b 20 28 | 73 65 65 20 46 69 67 75 |M bank (|see Figu|
|00002af0| 72 65 20 34 29 20 69 6e | 20 61 64 64 69 74 69 6f |re 4) in| additio|
|00002b00| 6e 20 74 6f 20 74 68 65 | 20 32 20 4d 42 20 61 6c |n to the| 2 MB al|
|00002b10| 72 65 61 64 79 20 73 6f | 6c 64 65 72 65 64 20 74 |ready so|ldered t|
|00002b20| 6f 20 74 68 65 20 6d 6f | 74 68 65 72 62 6f 61 72 |o the mo|therboar|
|00002b30| 64 2e 20 54 68 65 20 66 | 6f 6c 6c 6f 77 69 6e 67 |d. The f|ollowing|
|00002b40| 20 6d 65 6d 6f 72 79 20 | 63 6f 6e 66 69 67 75 72 | memory |configur|
|00002b50| 61 74 69 6f 6e 73 20 63 | 61 6e 20 62 65 20 69 6d |ations c|an be im|
|00002b60| 70 6c 65 6d 65 6e 74 65 | 64 20 62 79 20 69 6e 73 |plemente|d by ins|
|00002b70| 74 61 6c 6c 69 6e 67 20 | 53 49 4d 4d 20 70 61 69 |talling |SIMM pai|
|00002b80| 72 73 20 69 6e 20 74 68 | 69 73 20 61 64 64 69 74 |rs in th|is addit|
|00002b90| 69 6f 6e 61 6c 20 62 61 | 6e 6b 3a 0d 09 32 20 4d |ional ba|nk:..2 M|
|00002ba0| 42 2c 20 75 73 69 6e 67 | 20 66 6f 75 72 20 31 20 |B, using| four 1 |
|00002bb0| 4d 62 69 74 20 78 20 34 | 20 44 52 41 4d 73 20 73 |Mbit x 4| DRAMs s|
|00002bc0| 6f 6c 64 65 72 65 64 20 | 74 6f 20 74 68 65 20 6d |oldered |to the m|
|00002bd0| 6f 74 68 65 72 62 6f 61 | 72 64 0d 09 34 20 4d 42 |otherboa|rd..4 MB|
|00002be0| 2c 20 75 73 69 6e 67 20 | 74 77 6f 20 31 20 4d 62 |, using |two 1 Mb|
|00002bf0| 69 74 20 53 49 4d 4d 73 | 20 69 6e 20 74 68 65 20 |it SIMMs| in the |
|00002c00| 53 49 4d 4d 20 63 6f 6e | 6e 65 63 74 6f 72 73 0d |SIMM con|nectors.|
|00002c10| 09 36 20 4d 42 2c 20 75 | 73 69 6e 67 20 74 77 6f |.6 MB, u|sing two|
|00002c20| 20 32 20 4d 62 69 74 20 | 53 49 4d 4d 73 20 69 6e | 2 Mbit |SIMMs in|
|00002c30| 20 74 68 65 20 53 49 4d | 4d 20 63 6f 6e 6e 65 63 | the SIM|M connec|
|00002c40| 74 6f 72 73 0d 09 31 30 | 20 4d 42 2c 20 75 73 69 |tors..10| MB, usi|
|00002c50| 6e 67 20 74 77 6f 20 34 | 20 4d 62 69 74 20 53 49 |ng two 4| Mbit SI|
|00002c60| 4d 4d 73 20 69 6e 20 74 | 68 65 20 53 49 4d 4d 20 |MMs in t|he SIMM |
|00002c70| 63 6f 6e 6e 65 63 74 6f | 72 73 0d 54 68 65 20 4d |connecto|rs.The M|
|00002c80| 61 63 69 6e 74 6f 73 68 | 20 4c 43 20 72 65 71 75 |acintosh| LC requ|
|00002c90| 69 72 65 73 20 31 30 30 | 20 6e 73 20 6f 72 20 66 |ires 100| ns or f|
|00002ca0| 61 73 74 65 72 20 53 49 | 4d 4d 73 2e 0d 4d 61 63 |aster SI|MMs..Mac|
|00002cb0| 69 6e 74 6f 73 68 20 49 | 49 73 69 0d 54 68 65 20 |intosh I|Isi.The |
|00002cc0| 4d 61 63 69 6e 74 6f 73 | 68 20 49 49 73 69 20 69 |Macintos|h IIsi i|
|00002cd0| 73 20 73 69 6d 69 6c 61 | 72 20 74 6f 20 74 68 65 |s simila|r to the|
|00002ce0| 20 53 45 2f 33 30 2c 20 | 49 49 2c 20 49 49 78 2c | SE/30, |II, IIx,|
|00002cf0| 20 61 6e 64 20 49 49 63 | 78 20 69 6e 20 74 68 61 | and IIc|x in tha|
|00002d00| 74 20 69 74 20 75 73 65 | 73 20 61 20 33 32 2d 62 |t it use|s a 32-b|
|00002d10| 69 74 20 64 61 74 61 20 | 62 75 73 20 77 69 74 68 |it data |bus with|
|00002d20| 20 38 2d 62 69 74 20 53 | 49 4d 4d 73 3b 20 79 6f | 8-bit S|IMMs; yo|
|00002d30| 75 20 6d 75 73 74 20 61 | 6c 77 61 79 73 20 75 70 |u must a|lways up|
|00002d40| 67 72 61 64 65 20 6d 65 | 6d 6f 72 79 20 69 6e 20 |grade me|mory in |
|00002d50| 66 6f 75 72 20 53 49 4d | 4d 20 63 68 75 6e 6b 73 |four SIM|M chunks|
|00002d60| 2e 20 54 68 65 20 49 49 | 73 69 20 64 69 66 66 65 |. The II|si diffe|
|00002d70| 72 73 20 69 6e 20 74 68 | 61 74 20 69 74 20 6f 6e |rs in th|at it on|
|00002d80| 6c 79 20 68 61 73 20 6f | 6e 65 20 53 49 4d 4d 20 |ly has o|ne SIMM |
|00002d90| 62 61 6e 6b 20 69 6e 73 | 74 65 61 64 20 6f 66 20 |bank ins|tead of |
|00002da0| 74 77 6f 20 28 73 65 65 | 20 46 69 67 75 72 65 20 |two (see| Figure |
|00002db0| 34 29 2e 0d 49 66 20 66 | 75 74 75 72 65 20 31 36 |4)..If f|uture 16|
|00002dc0| 20 4d 62 69 74 20 44 52 | 41 4d 73 20 61 72 65 20 | Mbit DR|AMs are |
|00002dd0| 63 6f 6d 70 61 74 69 62 | 6c 65 20 77 69 74 68 20 |compatib|le with |
|00002de0| 74 68 65 20 63 75 72 72 | 65 6e 74 20 72 65 66 72 |the curr|ent refr|
|00002df0| 65 73 68 20 66 72 65 71 | 75 65 6e 63 79 2c 20 74 |esh freq|uency, t|
|00002e00| 68 65 6e 20 74 68 65 20 | 49 49 73 69 20 77 69 6c |hen the |IIsi wil|
|00002e10| 6c 20 73 75 70 70 6f 72 | 74 20 31 36 20 4d 62 69 |l suppor|t 16 Mbi|
|00002e20| 74 20 53 49 4d 4d 73 2c | 20 65 6e 61 62 6c 69 6e |t SIMMs,| enablin|
|00002e30| 67 20 61 20 52 41 4d 20 | 63 6f 6e 66 69 67 75 72 |g a RAM |configur|
|00002e40| 61 74 69 6f 6e 20 6f 66 | 20 36 35 20 4d 42 20 28 |ation of| 65 MB (|
|00002e50| 34 20 78 20 31 36 20 4d | 42 20 2b 20 31 20 4d 42 |4 x 16 M|B + 1 MB|
|00002e60| 29 2e 20 54 68 65 20 49 | 49 73 69 20 72 65 71 75 |). The I|Isi requ|
|00002e70| 69 72 65 73 20 31 30 30 | 20 6e 73 20 6f 72 20 66 |ires 100| ns or f|
|00002e80| 61 73 74 65 72 20 53 49 | 4d 4d 73 2e 0d 4d 61 63 |aster SI|MMs..Mac|
|00002e90| 69 6e 74 6f 73 68 20 49 | 49 63 69 0d 54 68 65 20 |intosh I|Ici.The |
|00002ea0| 4d 61 63 69 6e 74 6f 73 | 68 20 49 49 63 69 20 6d |Macintos|h IIci m|
|00002eb0| 6f 74 68 65 72 62 6f 61 | 72 64 20 6c 61 79 6f 75 |otherboa|rd layou|
|00002ec0| 74 20 69 73 20 73 6f 6d | 65 77 68 61 74 20 64 69 |t is som|ewhat di|
|00002ed0| 66 66 65 72 65 6e 74 20 | 66 72 6f 6d 20 74 68 65 |fferent |from the|
|00002ee0| 20 49 49 63 78 2c 20 62 | 75 74 20 74 68 65 20 6c | IIcx, b|ut the l|
|00002ef0| 6f 63 61 74 69 6f 6e 20 | 6f 66 20 74 68 65 20 52 |ocation |of the R|
|00002f00| 41 4d 20 53 49 4d 4d 73 | 20 69 73 20 75 6e 63 68 |AM SIMMs| is unch|
|00002f10| 61 6e 67 65 64 2e 20 42 | 61 6e 6b 20 41 20 69 73 |anged. B|ank A is|
|00002f20| 20 73 74 69 6c 6c 20 74 | 68 65 20 62 61 6e 6b 20 | still t|he bank |
|00002f30| 63 6c 6f 73 65 73 74 20 | 74 6f 20 74 68 65 20 64 |closest |to the d|
|00002f40| 69 73 6b 20 64 72 69 76 | 65 73 2e 20 52 65 66 65 |isk driv|es. Refe|
|00002f50| 72 20 74 6f 20 46 69 67 | 75 72 65 20 36 20 66 6f |r to Fig|ure 6 fo|
|00002f60| 72 20 74 68 65 20 70 72 | 6f 70 65 72 20 6c 6f 63 |r the pr|oper loc|
|00002f70| 61 74 69 6f 6e 73 20 6f | 66 20 42 61 6e 6b 73 20 |ations o|f Banks |
|00002f80| 41 20 61 6e 64 20 42 20 | 6f 6e 20 74 68 65 20 49 |A and B |on the I|
|00002f90| 49 63 69 2e 0d 54 68 65 | 20 49 49 63 69 20 68 61 |Ici..The| IIci ha|
|00002fa0| 73 20 61 20 6d 75 63 68 | 20 69 6d 70 72 6f 76 65 |s a much| improve|
|00002fb0| 64 20 52 41 4d 20 69 6e | 74 65 72 66 61 63 65 20 |d RAM in|terface |
|00002fc0| 61 6e 64 20 61 6c 6c 6f | 77 73 20 61 20 67 72 65 |and allo|ws a gre|
|00002fd0| 61 74 20 64 65 61 6c 20 | 6d 6f 72 65 20 66 72 65 |at deal |more fre|
|00002fe0| 65 64 6f 6d 20 77 68 65 | 6e 20 69 6e 73 74 61 6c |edom whe|n instal|
|00002ff0| 6c 69 6e 67 20 53 49 4d | 4d 73 2e 20 42 61 6e 6b |ling SIM|Ms. Bank|
|00003000| 73 20 41 20 61 6e 64 20 | 42 20 61 72 65 20 69 6e |s A and |B are in|
|00003010| 74 65 72 63 68 61 6e 67 | 65 61 62 6c 65 2c 20 6d |terchang|eable, m|
|00003020| 65 61 6e 69 6e 67 20 74 | 68 61 74 20 77 68 65 6e |eaning t|hat when|
|00003030| 20 6d 69 78 69 6e 67 20 | 74 77 6f 20 73 69 7a 65 | mixing |two size|
|00003040| 73 20 6f 66 20 52 41 4d | 2c 20 74 68 65 20 6c 61 |s of RAM|, the la|
|00003050| 72 67 65 72 20 53 49 4d | 4d 73 20 64 6f 20 6e 6f |rger SIM|Ms do no|
|00003060| 74 20 6e 65 63 65 73 73 | 61 72 69 6c 79 20 68 61 |t necess|arily ha|
|00003070| 76 65 20 74 6f 20 67 6f | 20 69 6e 20 42 61 6e 6b |ve to go| in Bank|
|00003080| 20 41 2e 20 49 6e 20 66 | 61 63 74 2c 20 66 6f 72 | A. In f|act, for|
|00003090| 20 62 65 73 74 20 70 65 | 72 66 6f 72 6d 61 6e 63 | best pe|rformanc|
|000030a0| 65 20 77 68 65 6e 20 75 | 73 69 6e 67 20 6f 6e 2d |e when u|sing on-|
|000030b0| 62 6f 61 72 64 20 76 69 | 64 65 6f 2c 20 41 70 70 |board vi|deo, App|
|000030c0| 6c 65 20 72 65 63 6f 6d | 6d 65 6e 64 73 20 74 68 |le recom|mends th|
|000030d0| 61 74 20 74 68 65 20 73 | 6d 61 6c 6c 65 72 20 53 |at the s|maller S|
|000030e0| 49 4d 4d 73 20 62 65 20 | 69 6e 73 74 61 6c 6c 65 |IMMs be |installe|
|000030f0| 64 20 69 6e 20 42 61 6e | 6b 20 41 2e 20 4e 6f 74 |d in Ban|k A. Not|
|00003100| 65 2c 20 68 6f 77 65 76 | 65 72 2c 20 74 68 61 74 |e, howev|er, that|
|00003110| 20 69 66 20 6f 6e 2d 62 | 6f 61 72 64 20 76 69 64 | if on-b|oard vid|
|00003120| 65 6f 20 69 73 20 75 73 | 65 64 2c 20 74 68 65 6e |eo is us|ed, then|
|00003130| 20 52 41 4d 20 6d 75 73 | 74 20 62 65 20 70 72 65 | RAM mus|t be pre|
|00003140| 73 65 6e 74 20 69 6e 20 | 42 61 6e 6b 20 41 2e 0d |sent in |Bank A..|
|00003150| 54 68 65 20 49 49 63 69 | 20 72 65 71 75 69 72 65 |The IIci| require|
|00003160| 73 20 74 68 61 74 20 53 | 49 4d 4d 73 20 62 65 20 |s that S|IMMs be |
|00003170| 38 30 20 6e 73 20 20 74 | 69 6d 65 20 6f 72 20 66 |80 ns  t|ime or f|
|00003180| 61 73 74 65 72 20 61 6e | 64 20 74 68 65 20 73 61 |aster an|d the sa|
|00003190| 6d 65 20 73 70 65 65 64 | 20 77 69 74 68 69 6e 20 |me speed| within |
|000031a0| 61 20 72 6f 77 2e 20 59 | 6f 75 20 63 61 6e 20 69 |a row. Y|ou can i|
|000031b0| 6d 70 6c 65 6d 65 6e 74 | 20 74 68 65 20 66 6f 6c |mplement| the fol|
|000031c0| 6c 6f 77 69 6e 67 20 6d | 65 6d 6f 72 79 20 63 6f |lowing m|emory co|
|000031d0| 6e 66 69 67 75 72 61 74 | 69 6f 6e 73 20 77 69 74 |nfigurat|ions wit|
|000031e0| 68 20 32 35 36 4b 20 61 | 6e 64 20 31 20 4d 42 20 |h 256K a|nd 1 MB |
|000031f0| 53 49 4d 4d 73 3a 0d 09 | 31 20 4d 42 20 75 73 69 |SIMMs:..|1 MB usi|
|00003200| 6e 67 20 66 6f 75 72 20 | 32 35 36 20 4b 62 69 74 |ng four |256 Kbit|
|00003210| 20 53 49 4d 4d 73 20 69 | 6e 20 42 61 6e 6b 20 41 | SIMMs i|n Bank A|
|00003220| 20 6f 72 20 69 6e 20 42 | 61 6e 6b 20 42 0d 09 32 | or in B|ank B..2|
|00003230| 20 4d 42 20 75 73 69 6e | 67 20 65 69 67 68 74 20 | MB usin|g eight |
|00003240| 32 35 36 20 4b 62 69 74 | 20 53 49 4d 4d 73 20 69 |256 Kbit| SIMMs i|
|00003250| 6e 20 42 61 6e 6b 73 20 | 41 20 61 6e 64 20 42 0d |n Banks |A and B.|
|00003260| 09 34 20 4d 42 20 75 73 | 69 6e 67 20 66 6f 75 72 |.4 MB us|ing four|
|00003270| 20 31 20 4d 62 69 74 20 | 53 49 4d 4d 73 20 69 6e | 1 Mbit |SIMMs in|
|00003280| 20 42 61 6e 6b 20 41 20 | 6f 72 20 69 6e 20 42 61 | Bank A |or in Ba|
|00003290| 6e 6b 20 42 0d 09 35 20 | 4d 42 20 75 73 69 6e 67 |nk B..5 |MB using|
|000032a0| 20 66 6f 75 72 20 32 35 | 36 20 4b 62 69 74 20 53 | four 25|6 Kbit S|
|000032b0| 49 4d 4d 73 20 69 6e 20 | 42 61 6e 6b 20 41 20 61 |IMMs in |Bank A a|
|000032c0| 6e 64 20 66 6f 75 72 20 | 31 20 4d 62 69 74 20 53 |nd four |1 Mbit S|
|000032d0| 49 4d 4d 73 20 69 6e 20 | 42 61 6e 6b 20 42 0d 09 |IMMs in |Bank B..|
|000032e0| 35 20 4d 42 20 75 73 69 | 6e 67 20 66 6f 75 72 20 |5 MB usi|ng four |
|000032f0| 31 20 4d 42 69 74 20 53 | 49 4d 4d 73 20 69 6e 20 |1 MBit S|IMMs in |
|00003300| 42 61 6e 6b 20 41 20 61 | 6e 64 20 66 6f 75 72 20 |Bank A a|nd four |
|00003310| 32 35 36 20 4b 62 69 74 | 20 53 49 4d 4d 73 20 69 |256 Kbit| SIMMs i|
|00003320| 6e 20 42 61 6e 6b 20 41 | 0d 09 38 20 4d 42 20 75 |n Bank A|..8 MB u|
|00003330| 73 69 6e 67 20 65 69 67 | 68 74 20 31 20 4d 62 69 |sing eig|ht 1 Mbi|
|00003340| 74 20 53 49 4d 4d 73 20 | 69 6e 20 42 61 6e 6b 73 |t SIMMs |in Banks|
|00003350| 20 41 20 61 6e 64 20 42 | 0d 54 68 65 20 31 20 4d | A and B|.The 1 M|
|00003360| 42 20 61 6e 64 20 34 20 | 4d 42 20 63 6f 6e 66 69 |B and 4 |MB confi|
|00003370| 67 75 72 61 74 69 6f 6e | 73 20 75 73 69 6e 67 20 |guration|s using |
|00003380| 6f 6e 6c 79 20 42 61 6e | 6b 20 42 20 61 72 65 20 |only Ban|k B are |
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|000033b0| 65 6f 2c 20 73 69 6e 63 | 65 20 42 61 6e 6b 20 41 |eo, sinc|e Bank A|
|000033c0| 20 6d 75 73 74 20 63 6f | 6e 74 61 69 6e 20 6d 65 | must co|ntain me|
|000033d0| 6d 6f 72 79 20 77 68 65 | 6e 20 75 73 69 6e 67 20 |mory whe|n using |
|000033e0| 6f 6e 2d 62 6f 61 72 64 | 20 76 69 64 65 6f 2e 20 |on-board| video. |
|000033f0| 54 68 65 20 66 69 72 73 | 74 20 35 20 4d 42 20 63 |The firs|t 5 MB c|
|00003400| 6f 6e 66 69 67 75 72 61 | 74 69 6f 6e 20 28 77 69 |onfigura|tion (wi|
|00003410| 74 68 20 32 35 36 20 4b | 62 69 74 20 53 49 4d 4d |th 256 K|bit SIMM|
|00003420| 73 20 69 6e 20 42 61 6e | 6b 20 41 29 20 69 73 20 |s in Ban|k A) is |
|00003430| 72 65 63 6f 6d 6d 65 6e | 64 65 64 20 66 6f 72 20 |recommen|ded for |
|00003440| 35 20 4d 42 20 63 6f 6e | 66 69 67 75 72 61 74 69 |5 MB con|figurati|
|00003450| 6f 6e 73 20 75 73 69 6e | 67 20 6f 6e 2d 62 6f 61 |ons usin|g on-boa|
|00003460| 72 64 20 76 69 64 65 6f | 2e 0d 50 61 72 69 74 79 |rd video|..Parity|
|00003470| 20 52 41 4d 0d 53 6f 6d | 65 20 73 70 65 63 69 61 | RAM.Som|e specia|
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|00003490| 69 6f 6e 73 20 6f 66 20 | 74 68 65 20 4d 61 63 69 |ions of |the Maci|
|000034a0| 6e 74 6f 73 68 20 49 49 | 63 69 20 61 72 65 20 65 |ntosh II|ci are e|
|000034b0| 71 75 69 70 70 65 64 20 | 77 69 74 68 20 61 20 50 |quipped |with a P|
|000034c0| 47 43 20 63 68 69 70 20 | 61 6e 64 20 73 75 70 70 |GC chip |and supp|
|000034d0| 6f 72 74 20 70 61 72 69 | 74 79 20 66 6f 72 20 52 |ort pari|ty for R|
|000034e0| 41 4d 20 65 72 72 6f 72 | 20 64 65 74 65 63 74 69 |AM error| detecti|
|000034f0| 6f 6e 2e 20 54 68 65 73 | 65 20 6d 61 63 68 69 6e |on. Thes|e machin|
|00003500| 65 73 20 72 65 71 75 69 | 72 65 20 70 61 72 69 74 |es requi|re parit|
|00003510| 79 20 52 41 4d 2e 20 53 | 49 4d 4d 73 20 66 6f 72 |y RAM. S|IMMs for|
|00003520| 20 74 68 65 73 65 20 6d | 61 63 68 69 6e 65 73 20 | these m|achines |
|00003530| 61 72 65 20 6e 69 6e 65 | 20 62 69 74 73 20 77 69 |are nine| bits wi|
|00003540| 64 65 20 69 6e 73 74 65 | 61 64 20 6f 66 20 65 69 |de inste|ad of ei|
|00003550| 67 68 74 2c 20 73 6f 20 | 74 68 65 72 65 20 69 73 |ght, so |there is|
|00003560| 20 67 65 6e 65 72 61 6c | 6c 79 20 61 6e 20 65 78 | general|ly an ex|
|00003570| 74 72 61 20 52 41 4d 20 | 49 43 20 6f 6e 20 74 68 |tra RAM |IC on th|
|00003580| 65 20 53 49 4d 4d 2e 20 | 54 68 65 72 65 20 69 73 |e SIMM. |There is|
|00003590| 20 6e 6f 20 64 69 66 66 | 65 72 65 6e 63 65 20 69 | no diff|erence i|
|000035a0| 6e 20 74 68 65 20 69 6e | 73 74 61 6c 6c 61 74 69 |n the in|stallati|
|000035b0| 6f 6e 20 6f 66 20 32 35 | 36 4b 20 78 20 39 20 6f |on of 25|6K x 9 o|
|000035c0| 72 20 31 4d 20 78 20 39 | 20 53 49 4d 4d 73 2e 0d |r 1M x 9| SIMMs..|
|000035d0| 4d 61 63 69 6e 74 6f 73 | 68 20 50 6f 72 74 61 62 |Macintos|h Portab|
|000035e0| 6c 65 0d 4d 65 6d 6f 72 | 79 20 65 78 70 61 6e 73 |le.Memor|y expans|
|000035f0| 69 6f 6e 20 6f 6e 20 74 | 68 65 20 4d 61 63 69 6e |ion on t|he Macin|
|00003600| 74 6f 73 68 20 50 6f 72 | 74 61 62 6c 65 20 69 73 |tosh Por|table is|
|00003610| 20 64 69 66 66 65 72 65 | 6e 74 20 66 72 6f 6d 20 | differe|nt from |
|00003620| 6f 74 68 65 72 20 6d 65 | 6d 62 65 72 73 20 6f 66 |other me|mbers of|
|00003630| 20 74 68 65 20 4d 61 63 | 69 6e 74 6f 73 68 20 66 | the Mac|intosh f|
|00003640| 61 6d 69 6c 79 20 73 69 | 6e 63 65 20 74 68 65 20 |amily si|nce the |
|00003650| 50 6f 72 74 61 62 6c 65 | 20 75 73 65 73 20 6d 65 |Portable| uses me|
|00003660| 6d 6f 72 79 20 65 78 70 | 61 6e 73 69 6f 6e 20 63 |mory exp|ansion c|
|00003670| 61 72 64 73 20 69 6e 20 | 70 6c 61 63 65 20 6f 66 |ards in |place of|
|00003680| 20 53 49 4d 4d 73 2e 20 | 54 68 65 20 62 61 73 65 | SIMMs. |The base|
|00003690| 20 50 6f 72 74 61 62 6c | 65 20 69 73 20 65 71 75 | Portabl|e is equ|
|000036a0| 69 70 70 65 64 20 77 69 | 74 68 20 31 20 4d 42 20 |ipped wi|th 1 MB |
|000036b0| 6f 66 20 52 41 4d 20 6f | 6e 20 74 68 65 20 6d 6f |of RAM o|n the mo|
|000036c0| 74 68 65 72 62 6f 61 72 | 64 20 61 6e 64 20 68 61 |therboar|d and ha|
|000036d0| 73 20 6f 6e 65 20 52 41 | 4d 20 65 78 70 61 6e 73 |s one RA|M expans|
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|000044f0| 6e 73 20 44 52 41 4d 2c | 20 73 6f 20 61 20 36 30 |ns DRAM,| so a 60|
|00004500| 20 6e 73 20 53 49 4d 4d | 20 77 6f 75 6c 64 6e d5 | ns SIMM| wouldn.|
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|00004520| 65 65 64 2e 20 0d 49 66 | 20 6f 6e 65 20 73 6c 6f |eed. .If| one slo|
|00004530| 74 20 69 6e 20 61 20 67 | 69 76 65 6e 20 62 61 6e |t in a g|iven ban|
|00004540| 6b 20 69 73 20 66 69 6c | 6c 65 64 2c 20 74 68 65 |k is fil|led, the|
|00004550| 6e 20 61 6c 6c 20 73 6c | 6f 74 73 20 69 6e 20 74 |n all sl|ots in t|
|00004560| 68 61 74 20 70 61 72 74 | 69 63 75 6c 61 72 20 62 |hat part|icular b|
|00004570| 61 6e 6b 20 6d 75 73 74 | 20 62 65 20 70 6f 70 75 |ank must| be popu|
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|000045a0| 74 20 69 73 20 6e 6f 74 | 20 70 6f 73 73 69 62 6c |t is not| possibl|
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|00004600| 6c 61 74 65 64 20 64 6f | 65 73 20 6e 6f 74 20 6d |lated do|es not m|
|00004610| 61 74 74 65 72 20 28 66 | 6f 72 20 65 78 61 6d 70 |atter (f|or examp|
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|00004650| 42 61 6e 6b 20 42 2c 20 | 61 6e 64 20 66 6f 75 72 |Bank B, |and four|
|00004660| 20 34 20 4d 42 20 53 49 | 4d 4d 73 20 69 6e 20 42 | 4 MB SI|MMs in B|
|00004670| 61 6e 6b 20 44 29 2e 0d | 4e 6f 74 65 3a 20 57 68 |ank D)..|Note: Wh|
|00004680| 65 6e 20 6c 61 72 67 65 | 20 61 6d 6f 75 6e 74 73 |en large| amounts|
|00004690| 20 6f 66 20 44 52 41 4d | 20 61 72 65 20 69 6e 73 | of DRAM| are ins|
|000046a0| 74 61 6c 6c 65 64 2c 20 | 74 68 65 20 6d 65 6d 6f |talled, |the memo|
|000046b0| 72 79 20 63 68 65 63 6b | 20 75 70 6f 6e 20 73 74 |ry check| upon st|
|000046c0| 61 72 74 75 70 20 69 73 | 20 6c 65 6e 67 74 68 79 |artup is| lengthy|
|000046d0| 20 61 6e 64 20 63 61 6e | 20 63 61 75 73 65 20 75 | and can| cause u|
|000046e0| 73 65 72 73 20 74 6f 20 | 74 68 69 6e 6b 20 74 68 |sers to |think th|
|000046f0| 61 74 20 74 68 65 20 6d | 61 63 68 69 6e 65 20 69 |at the m|achine i|
|00004700| 73 6e d5 74 20 66 75 6e | 63 74 69 6f 6e 69 6e 67 |sn.t fun|ctioning|
|00004710| 2e 20 54 68 65 72 65 20 | 69 73 20 6e 6f 20 73 6f |. There |is no so|
|00004720| 66 74 77 61 72 65 20 69 | 6e 64 69 63 61 74 69 6f |ftware i|ndicatio|
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|00004740| 6e 65 20 69 73 20 72 75 | 6e 6e 69 6e 67 20 6d 65 |ne is ru|nning me|
|00004750| 6d 6f 72 79 20 63 68 65 | 63 6b 73 2e 0d 4d 61 63 |mory che|cks..Mac|
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|00004770| 30 0d 46 69 67 75 72 65 | 20 39 20 2d 20 56 69 65 |0.Figure| 9 - Vie|
|00004780| 77 20 6f 66 20 74 68 65 | 20 4d 61 63 69 6e 74 6f |w of the| Macinto|
|00004790| 73 68 20 51 75 61 64 72 | 61 20 37 30 30 20 57 69 |sh Quadr|a 700 Wi|
|000047a0| 74 68 20 43 61 73 65 20 | 4f 70 65 6e 0d 54 68 65 |th Case |Open.The|
|000047b0| 20 6d 65 6d 6f 72 79 20 | 63 6f 6e 74 72 6f 6c 20 | memory |control |
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|000047d0| 6e 74 72 6f 6c 73 20 74 | 77 6f 20 62 61 6e 6b 73 |ntrols t|wo banks|
|000047e0| 20 6f 66 20 64 79 6e 61 | 6d 69 63 20 52 41 4d 20 | of dyna|mic RAM |
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|00004800| 20 51 75 61 64 72 61 20 | 37 30 30 2e 20 54 68 65 | Quadra |700. The|
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|00004820| 6f 6c 64 65 72 65 64 20 | 64 6f 77 6e 20 61 74 20 |oldered |down at |
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|00004840| 20 66 69 78 65 64 20 61 | 74 20 34 20 4d 42 2e 20 | fixed a|t 4 MB. |
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|00004860| 61 6e 6b 20 61 63 63 65 | 70 74 73 20 73 74 61 6e |ank acce|pts stan|
|00004870| 64 61 72 64 20 38 30 20 | 6e 73 20 53 49 4d 4d 73 |dard 80 |ns SIMMs|
|00004880| 20 63 6f 6e 74 61 69 6e | 69 6e 67 20 31 20 4d 42 | contain|ing 1 MB|
|00004890| 2c 20 34 20 4d 42 2c 20 | 61 6e 64 20 70 65 72 68 |, 4 MB, |and perh|
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|00004910| 72 65 20 74 68 65 20 4d | 61 63 69 6e 74 6f 73 68 |re the M|acintosh|
|00004920| 20 51 75 61 64 72 61 20 | 37 30 30 20 63 6f 75 6c | Quadra |700 coul|
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|00004970| 6c 61 62 6c 65 2e 20 31 | 36 20 4d 42 20 53 49 4d |lable. 1|6 MB SIM|
|00004980| 4d 73 20 68 61 76 65 20 | 6e 6f 74 20 62 65 65 6e |Ms have |not been|
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|000049a0| 75 61 64 72 61 20 37 30 | 30 20 61 6e 64 20 74 68 |uadra 70|0 and th|
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|000049f0| 6f 73 68 20 51 75 61 64 | 72 61 20 37 30 30 20 63 |osh Quad|ra 700 c|
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|00004a20| 20 4d 43 55 20 69 73 20 | 70 72 6f 67 72 61 6d 6d | MCU is |programm|
|00004a30| 65 64 20 66 6f 72 20 38 | 30 20 6e 73 20 44 52 41 |ed for 8|0 ns DRA|
|00004a40| 4d 2c 20 73 6f 20 61 20 | 36 30 20 6e 73 20 53 49 |M, so a |60 ns SI|
|00004a50| 4d 4d 20 77 6f 75 6c 64 | 6e d5 74 20 69 6d 70 72 |MM would|n.t impr|
|00004a60| 6f 76 65 20 74 68 65 20 | 73 70 65 65 64 2e 20 49 |ove the |speed. I|
|00004a70| 66 20 6f 6e 65 20 73 6c | 6f 74 20 69 6e 20 61 20 |f one sl|ot in a |
|00004a80| 67 69 76 65 6e 20 62 61 | 6e 6b 20 69 73 20 66 69 |given ba|nk is fi|
|00004a90| 6c 6c 65 64 2c 20 74 68 | 65 6e 20 61 6c 6c 20 73 |lled, th|en all s|
|00004aa0| 6c 6f 74 73 20 69 6e 20 | 74 68 65 20 62 61 6e 6b |lots in |the bank|
|00004ab0| 20 6d 75 73 74 20 62 65 | 20 70 6f 70 75 6c 61 74 | must be| populat|
|00004ac0| 65 64 2e 20 49 74 20 69 | 73 20 6e 6f 74 20 70 6f |ed. It i|s not po|
|00004ad0| 73 73 69 62 6c 65 20 74 | 6f 20 6d 69 78 20 74 68 |ssible t|o mix th|
|00004ae0| 65 20 73 70 65 65 64 20 | 6f 66 20 52 41 4d 20 53 |e speed |of RAM S|
|00004af0| 49 4d 4d 73 20 6f 6e 20 | 74 68 65 20 51 75 61 64 |IMMs on |the Quad|
|00004b00| 72 61 20 37 30 30 2e 0d | 4e 6f 74 65 3a 20 44 75 |ra 700..|Note: Du|
|00004b10| 65 20 74 6f 20 74 68 65 | 20 6c 6f 63 61 74 69 6f |e to the| locatio|
|00004b20| 6e 20 6f 66 20 74 68 65 | 20 53 49 4d 4d 20 73 6c |n of the| SIMM sl|
|00004b30| 6f 74 73 20 6f 6e 20 74 | 68 65 20 4d 61 63 69 6e |ots on t|he Macin|
|00004b40| 74 6f 73 68 20 51 75 61 | 64 72 61 20 37 30 30 2c |tosh Qua|dra 700,|
|00004b50| 20 69 74 20 69 73 20 75 | 6e 6c 69 6b 65 6c 79 20 | it is u|nlikely |
|00004b60| 74 68 61 74 20 74 68 69 | 72 64 2d 20 70 61 72 74 |that thi|rd- part|
|00004b70| 79 20 76 65 6e 64 6f 72 | 73 20 77 69 6c 6c 20 62 |y vendor|s will b|
|00004b80| 65 20 61 62 6c 65 20 74 | 6f 20 64 65 76 65 6c 6f |e able t|o develo|
|00004b90| 70 20 31 36 20 4d 42 20 | 53 49 4d 4d 73 20 74 68 |p 16 MB |SIMMs th|
|00004ba0| 61 74 20 77 6f 72 6b 20 | 6f 6e 20 74 68 69 73 20 |at work |on this |
|00004bb0| 6d 61 63 68 69 6e 65 2e | 20 54 68 65 20 70 6c 61 |machine.| The pla|
|00004bc0| 63 65 6d 65 6e 74 20 6f | 66 20 74 68 65 20 53 49 |cement o|f the SI|
|00004bd0| 4d 4d 20 73 6c 6f 74 73 | 20 28 75 6e 64 65 72 20 |MM slots| (under |
|00004be0| 74 68 65 20 68 61 72 64 | 20 64 72 69 76 65 29 20 |the hard| drive) |
|00004bf0| 69 73 20 75 6e 66 6f 72 | 74 75 6e 61 74 65 2c 20 |is unfor|tunate, |
|00004c00| 62 75 74 20 6e 65 63 65 | 73 73 61 72 79 20 64 75 |but nece|ssary du|
|00004c10| 65 20 74 6f 20 74 68 65 | 20 6c 6f 67 69 63 20 62 |e to the| logic b|
|00004c20| 6f 61 72 64 20 72 65 61 | 6c 20 65 73 74 61 74 65 |oard rea|l estate|
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|00004c40| 73 69 63 20 49 49 0d 54 | 68 65 20 4d 61 63 69 6e |sic II.T|he Macin|
|00004c50| 74 6f 73 68 20 43 6c 61 | 73 73 69 63 20 49 49 20 |tosh Cla|ssic II |
|00004c60| 63 61 6e 20 73 75 70 70 | 6f 72 74 20 75 70 20 74 |can supp|ort up t|
|00004c70| 6f 20 31 30 20 4d 42 20 | 6f 66 20 73 79 73 74 65 |o 10 MB |of syste|
|00004c80| 6d 20 52 41 4d 2e 20 54 | 68 65 20 6c 6f 67 69 63 |m RAM. T|he logic|
|00004c90| 20 62 6f 61 72 64 20 69 | 6e 63 6c 75 64 65 73 20 | board i|ncludes |
|00004ca0| 32 20 4d 42 20 73 6f 6c | 64 65 72 65 64 20 61 6e |2 MB sol|dered an|
|00004cb0| 64 20 32 20 53 49 4d 4d | 20 73 6f 63 6b 65 74 73 |d 2 SIMM| sockets|
|00004cc0| 20 74 68 61 74 20 63 61 | 6e 20 61 63 63 6f 6d 6d | that ca|n accomm|
|00004cd0| 6f 64 61 74 65 20 31 2c | 20 32 2c 20 6f 72 20 34 |odate 1,| 2, or 4|
|00004ce0| 20 4d 42 20 53 49 4d 4d | 53 20 66 6f 72 20 70 6f | MB SIMM|S for po|
|00004cf0| 73 73 69 62 6c 65 20 73 | 79 73 74 65 6d 20 63 6f |ssible s|ystem co|
|00004d00| 6e 66 69 67 75 72 61 74 | 69 6f 6e 73 20 6f 66 20 |nfigurat|ions of |
|00004d10| 32 2c 20 34 2c 20 36 2c | 20 6f 72 20 31 30 20 4d |2, 4, 6,| or 10 M|
|00004d20| 42 2e 20 54 68 65 20 43 | 6c 61 73 73 69 63 20 49 |B. The C|lassic I|
|00004d30| 49 20 72 65 71 75 69 72 | 65 73 20 31 30 30 20 6e |I requir|es 100 n|
|00004d40| 73 20 6f 72 20 66 61 73 | 74 65 72 20 61 63 63 65 |s or fas|ter acce|
|00004d50| 73 73 20 74 69 6d 65 20 | 66 6f 72 20 53 49 4d 4d |ss time |for SIMM|
|00004d60| 73 20 74 6f 20 62 65 20 | 63 6f 6d 70 61 74 69 62 |s to be |compatib|
|00004d70| 6c 65 2e 0d 50 6f 73 73 | 69 62 6c 65 20 6d 65 6d |le..Poss|ible mem|
|00004d80| 6f 72 79 20 63 6f 6e 66 | 69 67 75 72 61 74 69 6f |ory conf|iguratio|
|00004d90| 6e 73 3a 0d 42 75 69 6c | 74 2d 69 6e 09 2b 09 53 |ns:.Buil|t-in.+.S|
|00004da0| 49 4d 4d 20 73 69 7a 65 | 09 78 32 09 3d 09 54 6f |IMM size|.x2.=.To|
|00004db0| 74 61 6c 20 52 41 4d 20 | 28 4d 42 29 0d 09 32 09 |tal RAM |(MB)..2.|
|00004dc0| 30 09 32 0d 09 32 09 31 | 09 34 0d 09 32 09 32 09 |0.2..2.1|.4..2.2.|
|00004dd0| 36 0d 09 32 09 34 09 31 | 30 0d 46 69 67 75 72 65 |6..2.4.1|0.Figure|
|00004de0| 20 31 30 20 2d 20 4d 61 | 63 69 6e 74 6f 73 68 20 | 10 - Ma|cintosh |
|00004df0| 43 6c 61 73 73 69 63 20 | 49 49 0d 28 53 49 4d 4d |Classic |II.(SIMM|
|00004e00| 73 20 6d 75 73 74 20 62 | 65 20 31 30 30 20 6e 73 |s must b|e 100 ns|
|00004e10| 20 52 41 53 2d 61 63 63 | 65 73 73 20 74 69 6d 65 | RAS-acc|ess time|
|00004e20| 20 6f 72 20 66 61 73 74 | 65 72 2e 29 0d 4d 61 63 | or fast|er.).Mac|
|00004e30| 69 6e 74 6f 73 68 20 50 | 6f 77 65 72 42 6f 6f 6b |intosh P|owerBook|
|00004e40| 20 31 34 30 20 61 6e 64 | 20 4d 61 63 69 6e 74 6f | 140 and| Macinto|
|00004e50| 73 68 20 50 6f 77 65 72 | 42 6f 6f 6b 20 31 37 30 |sh Power|Book 170|
|00004e60| 20 0d 54 68 65 20 4d 61 | 63 69 6e 74 6f 73 68 20 | .The Ma|cintosh |
|00004e70| 50 6f 77 65 72 42 6f 6f | 6b 20 31 34 30 20 61 6e |PowerBoo|k 140 an|
|00004e80| 64 20 31 37 30 20 73 68 | 69 70 20 77 69 74 68 20 |d 170 sh|ip with |
|00004e90| 32 20 4d 42 20 6f 66 20 | 50 53 52 41 4d 20 28 70 |2 MB of |PSRAM (p|
|00004ea0| 73 65 75 64 6f 2d 73 74 | 61 74 69 63 29 20 6f 6e |seudo-st|atic) on|
|00004eb0| 20 74 68 65 20 64 61 75 | 67 68 74 65 72 20 62 6f | the dau|ghter bo|
|00004ec0| 61 72 64 2e 20 54 68 65 | 20 52 41 4d 20 69 73 20 |ard. The| RAM is |
|00004ed0| 61 72 72 61 6e 67 65 64 | 20 70 68 79 73 69 63 61 |arranged| physica|
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|00004ef0| 69 74 20 63 68 69 70 73 | 20 6f 66 20 35 31 32 4b |it chips| of 512K|
|00004f00| 20 78 20 38 2d 62 69 74 | 73 20 65 61 63 68 2e 20 | x 8-bit|s each. |
|00004f10| 41 64 64 69 74 69 6f 6e | 61 6c 6c 79 2c 20 61 6e |Addition|ally, an|
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|00004f30| 61 6c 6c 6f 77 73 20 52 | 41 4d 20 74 6f 20 62 65 |allows R|AM to be|
|00004f40| 20 65 78 70 61 6e 64 65 | 64 20 74 6f 20 61 20 74 | expande|d to a t|
|00004f50| 6f 74 61 6c 20 6f 66 20 | 38 20 4d 42 2e 20 42 6f |otal of |8 MB. Bo|
|00004f60| 74 68 20 6e 6f 74 65 62 | 6f 6f 6b 20 73 79 73 74 |th noteb|ook syst|
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|00004f80| 53 52 41 4d 2e 20 54 68 | 65 20 4d 61 63 69 6e 74 |SRAM. Th|e Macint|
|00004f90| 6f 73 68 20 50 6f 77 65 | 72 42 6f 6f 6b 20 31 34 |osh Powe|rBook 14|
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|00004fd0| 63 69 6e 74 6f 73 68 20 | 50 6f 77 65 72 42 6f 6f |cintosh |PowerBoo|
|00004fe0| 6b 20 31 37 30 20 68 61 | 73 20 74 77 6f 20 77 61 |k 170 ha|s two wa|
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|00005010| 53 52 41 4d 20 6e 65 65 | 64 73 20 74 6f 20 62 65 |SRAM nee|ds to be|
|00005020| 20 72 65 66 72 65 73 68 | 65 64 2c 20 61 6e 64 20 | refresh|ed, and |
|00005030| 74 68 65 20 72 65 66 72 | 65 73 68 20 69 73 20 61 |the refr|esh is a|
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|00005050| 69 72 63 75 69 74 72 79 | 20 69 6e 20 74 68 65 20 |ircuitry| in the |
|00005060| 43 50 55 20 47 6c 75 65 | 20 4c 6f 67 69 63 20 41 |CPU Glue| Logic A|
|00005070| 53 49 43 2e 20 54 68 65 | 20 72 65 66 72 65 73 68 |SIC. The| refresh|
|00005080| 20 72 65 71 75 69 72 65 | 6d 65 6e 74 20 63 61 75 | require|ment cau|
|00005090| 73 65 73 20 61 20 32 25 | 20 72 65 64 75 63 74 69 |ses a 2%| reducti|
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|000050d0| 20 6c 65 73 73 20 63 75 | 72 72 65 6e 74 20 69 6e | less cu|rrent in|
|000050e0| 20 73 6c 65 65 70 20 6d | 6f 64 65 20 61 6e 64 20 | sleep m|ode and |
|000050f0| 63 6f 73 74 73 20 6c 65 | 73 73 20 74 68 61 6e 20 |costs le|ss than |
|00005100| 53 52 41 4d 2e 0d 54 68 | 65 20 50 6f 77 65 72 42 |SRAM..Th|e PowerB|
|00005110| 6f 6f 6b 20 63 6f 6d 70 | 75 74 65 72 73 20 63 6f |ook comp|uters co|
|00005120| 6e 74 61 69 6e 20 61 20 | 37 30 2d 70 69 6e 20 52 |ntain a |70-pin R|
|00005130| 41 4d 20 65 78 70 61 6e | 73 69 6f 6e 20 63 6f 6e |AM expan|sion con|
|00005140| 6e 65 63 74 6f 72 20 28 | 73 6c 6f 74 29 20 74 68 |nector (|slot) th|
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|00005160| 65 78 70 61 6e 73 69 6f | 6e 20 63 61 72 64 20 73 |expansio|n card s|
|00005170| 69 7a 65 73 20 6f 66 20 | 32 2c 20 34 2c 20 61 6e |izes of |2, 4, an|
|00005180| 64 20 36 20 4d 42 2e 20 | 41 70 70 6c 65 20 6f 66 |d 6 MB. |Apple of|
|00005190| 66 65 72 73 20 61 20 32 | 20 4d 42 20 61 6e 64 20 |fers a 2| MB and |
|000051a0| 34 20 4d 42 20 6d 65 6d | 6f 72 79 20 63 61 72 64 |4 MB mem|ory card|
|000051b0| 2e 0d 4e 6f 74 65 3a 20 | 49 66 20 61 20 52 41 4d |..Note: |If a RAM|
|000051c0| 20 65 78 70 61 6e 73 69 | 6f 6e 20 63 61 72 64 20 | expansi|on card |
|000051d0| 69 73 20 64 65 73 69 67 | 6e 65 64 20 63 6f 72 72 |is desig|ned corr|
|000051e0| 65 63 74 6c 79 2c 20 69 | 74 20 77 69 6c 6c 20 77 |ectly, i|t will w|
|000051f0| 6f 72 6b 20 69 6e 20 61 | 6c 6c 20 6f 66 20 74 68 |ork in a|ll of th|
|00005200| 65 20 50 6f 77 65 72 42 | 6f 6f 6b 20 63 6f 6d 70 |e PowerB|ook comp|
|00005210| 75 74 65 72 73 2e 20 54 | 68 65 20 36 38 30 33 30 |uters. T|he 68030|
|00005220| 2d 62 61 73 65 64 20 50 | 6f 77 65 72 42 6f 6f 6b |-based P|owerBook|
|00005230| 73 20 68 61 76 65 20 61 | 20 33 32 2d 62 69 74 20 |s have a| 32-bit |
|00005240| 64 61 74 61 20 62 75 73 | 20 77 68 65 72 65 61 73 |data bus| whereas|
|00005250| 20 74 68 65 20 36 38 48 | 43 30 30 30 2d 62 61 73 | the 68H|C000-bas|
|00005260| 65 64 20 6d 61 63 68 69 | 6e 65 20 28 74 68 65 20 |ed machi|ne (the |
|00005270| 50 6f 77 65 72 42 6f 6f | 6b 20 31 30 30 29 20 68 |PowerBoo|k 100) h|
|00005280| 61 73 20 6f 6e 6c 79 20 | 61 20 31 36 2d 62 69 74 |as only |a 16-bit|
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|00005db0| 61 6e 64 20 31 37 30 20 | 63 6f 6d 70 75 74 65 72 |and 170 |computer|
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|00006090| 6f 74 20 43 61 6d 65 6c | 6f 74 2c 20 4a 61 6d 65 |ot Camel|ot, Jame|
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|000060b0| 20 6f 6e 20 70 72 6f 62 | 61 74 69 6f 6e 2c 20 61 | on prob|ation, a|
|000060c0| 6e 64 20 34 20 4d 42 20 | 53 49 4d 4d 73 20 64 6f |nd 4 MB |SIMMs do|
|000060d0| 20 6e 6f 74 20 77 6f 72 | 6b 20 61 73 20 61 64 76 | not wor|k as adv|
|000060e0| 65 72 74 69 73 65 64 20 | 69 6e 20 6d 6f 73 74 20 |ertised |in most |
|000060f0| 63 61 73 65 73 2e 20 54 | 68 69 73 20 69 73 20 74 |cases. T|his is t|
|00006100| 68 65 20 73 74 6f 72 79 | 20 6f 66 20 74 68 65 20 |he story| of the |
|00006110| 52 65 76 6f 6c 74 20 6f | 66 20 74 68 65 20 34 20 |Revolt o|f the 4 |
|00006120| 4d 42 20 44 52 41 4d 20 | 53 49 4d 4d 73 2e 0d 50 |MB DRAM |SIMMs..P|
|00006130| 72 65 6c 69 6d 69 6e 61 | 72 79 20 4e 6f 74 65 73 |relimina|ry Notes|
|00006140| 0d 42 65 66 6f 72 65 20 | 64 69 76 69 6e 67 20 69 |.Before |diving i|
|00006150| 6e 74 6f 20 74 68 65 20 | 70 72 6f 62 6c 65 6d 20 |nto the |problem |
|00006160| 77 69 74 68 20 34 20 4d | 62 69 74 20 44 52 41 4d |with 4 M|bit DRAM|
|00006170| 73 2c 20 74 68 65 72 65 | 20 69 73 20 73 6f 6d 65 |s, there| is some|
|00006180| 20 70 72 65 6c 69 6d 69 | 6e 61 72 79 20 67 72 6f | prelimi|nary gro|
|00006190| 75 6e 64 20 74 68 61 74 | 20 6d 75 73 74 20 62 65 |und that| must be|
|000061a0| 20 63 6f 76 65 72 65 64 | 2e 0d 46 69 72 73 74 2c | covered|..First,|
|000061b0| 20 74 68 65 72 65 20 61 | 72 65 20 61 20 63 6f 75 | there a|re a cou|
|000061c0| 70 6c 65 20 77 61 79 73 | 20 74 6f 20 63 6f 6e 73 |ple ways| to cons|
|000061d0| 74 72 75 63 74 20 61 20 | 34 20 4d 42 20 53 49 4d |truct a |4 MB SIM|
|000061e0| 4d 2e 20 55 73 69 6e 67 | 20 6f 6c 64 20 74 65 63 |M. Using| old tec|
|000061f0| 68 6e 6f 6c 6f 67 79 2c | 20 69 74 20 69 73 20 70 |hnology,| it is p|
|00006200| 6f 73 73 69 62 6c 65 20 | 74 6f 20 63 72 61 6d 20 |ossible |to cram |
|00006210| 74 6f 67 65 74 68 65 72 | 20 33 32 20 44 52 41 4d |together| 32 DRAM|
|00006220| 20 49 43 73 20 6f 66 20 | 31 4d 20 78 20 31 20 64 | ICs of |1M x 1 d|
|00006230| 65 6e 73 69 74 79 2e 20 | 55 73 69 6e 67 20 6e 65 |ensity. |Using ne|
|00006240| 77 20 74 65 63 68 6e 6f | 6c 6f 67 79 2c 20 69 74 |w techno|logy, it|
|00006250| 20 6f 6e 6c 79 20 74 61 | 6b 65 73 20 65 69 67 68 | only ta|kes eigh|
|00006260| 74 20 34 4d 20 78 20 31 | 20 49 43 73 2c 20 72 65 |t 4M x 1| ICs, re|
|00006270| 73 75 6c 74 69 6e 67 20 | 69 6e 20 61 20 6d 75 63 |sulting |in a muc|
|00006280| 68 20 73 6d 61 6c 6c 65 | 72 2c 20 6c 6f 77 65 72 |h smalle|r, lower|
|00006290| 2d 70 6f 77 65 72 20 6d | 6f 64 75 6c 65 2e 20 49 |-power m|odule. I|
|000062a0| 66 20 61 20 34 20 4d 42 | 20 53 49 4d 4d 20 69 73 |f a 4 MB| SIMM is|
|000062b0| 20 6f 66 20 74 68 65 20 | 6c 61 72 67 65 2c 20 73 | of the |large, s|
|000062c0| 6f 2d 63 61 6c 6c 65 64 | 20 63 6f 6d 70 6f 73 69 |o-called| composi|
|000062d0| 74 65 20 74 79 70 65 20 | 28 74 68 61 74 20 69 73 |te type |(that is|
|000062e0| 2c 20 69 74 20 69 73 20 | 63 6f 6e 73 74 72 75 63 |, it is |construc|
|000062f0| 74 65 64 20 6f 66 20 33 | 32 20 31 20 4d 62 69 74 |ted of 3|2 1 Mbit|
|00006300| 20 49 43 73 29 2c 20 74 | 68 65 6e 20 65 76 65 72 | ICs), t|hen ever|
|00006310| 79 74 68 69 6e 67 20 69 | 73 20 66 69 6e 65 20 65 |ything i|s fine e|
|00006320| 78 63 65 70 74 20 6f 6e | 20 74 68 65 20 6f 72 69 |xcept on| the ori|
|00006330| 67 69 6e 61 6c 20 4d 61 | 63 69 6e 74 6f 73 68 20 |ginal Ma|cintosh |
|00006340| 49 49 2e 20 50 6c 65 61 | 73 65 20 72 65 66 65 72 |II. Plea|se refer|
|00006350| 20 74 6f 20 70 61 67 65 | 20 37 20 6f 66 20 74 68 | to page| 7 of th|
|00006360| 69 73 20 54 65 63 68 20 | 4e 6f 74 65 20 66 6f 72 |is Tech |Note for|
|00006370| 20 6d 6f 72 65 20 69 6e | 66 6f 72 6d 61 74 69 6f | more in|formatio|
|00006380| 6e 20 6f 6e 20 4d 61 63 | 69 6e 74 6f 73 68 20 49 |n on Mac|intosh I|
|00006390| 49 20 52 41 4d 2e 0d 57 | 69 74 68 20 74 68 65 20 |I RAM..W|ith the |
|000063a0| 46 44 48 44 20 53 75 70 | 65 72 44 72 69 76 65 20 |FDHD Sup|erDrive |
|000063b0| 75 70 67 72 61 64 65 20 | 6b 69 74 20 69 6e 73 74 |upgrade |kit inst|
|000063c0| 61 6c 6c 65 64 2c 20 74 | 68 65 20 4d 61 63 69 6e |alled, t|he Macin|
|000063d0| 74 6f 73 68 20 49 49 20 | 69 73 20 6f 6e 20 65 71 |tosh II |is on eq|
|000063e0| 75 61 6c 20 66 6f 6f 74 | 69 6e 67 20 77 69 74 68 |ual foot|ing with|
|000063f0| 20 74 68 65 20 4d 61 63 | 69 6e 74 6f 73 68 20 49 | the Mac|intosh I|
+--------+-------------------------+-------------------------+--------+--------+