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Unknown  |  2008-03-11  |  1.3 KB
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ConfidenceProgramDetectionMatch TypeSupport
100% file data default
100% detectItEasy Format: plain text[LF] default (weak)


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+--------+-------------------------+-------------------------+--------+--------+
|00000000| 54 68 69 73 20 69 73 20 | 74 68 65 20 73 63 68 65 |This is |the sche|
|00000010| 6d 61 74 69 63 20 64 69 | 61 67 72 61 6d 20 6f 66 |matic di|agram of|
|00000020| 20 74 68 65 20 43 6f 6d | 6d 6f 64 6f 72 65 20 31 | the Com|modore 1|
|00000030| 35 34 31 2f 49 49 20 66 | 6c 6f 70 70 79 20 64 72 |541/II f|loppy dr|
|00000040| 69 76 65 2e 20 49 20 64 | 72 65 77 0a 69 74 20 27 |ive. I d|rew.it '|
|00000050| 63 6f 7a 20 49 20 63 6f | 75 6c 64 6e 27 74 20 66 |coz I co|uldn't f|
|00000060| 69 6e 64 20 69 74 20 69 | 6e 20 61 6e 79 77 68 65 |ind it i|n anywhe|
|00000070| 72 65 2e 20 49 74 20 77 | 61 73 20 64 72 61 77 6e |re. It w|as drawn|
|00000080| 20 77 69 74 68 20 43 69 | 72 43 61 64 2c 20 6f 6e | with Ci|rCad, on|
|00000090| 20 61 0a 50 43 2f 41 54 | 2c 20 62 75 74 20 49 20 | a.PC/AT|, but I |
|000000a0| 6d 61 64 65 20 61 20 47 | 49 46 20 66 69 6c 65 20 |made a G|IF file |
|000000b0| 74 6f 20 6d 61 6b 65 20 | 69 74 20 72 65 70 72 6f |to make |it repro|
|000000c0| 64 75 63 61 62 6c 65 20 | 77 69 74 68 6f 75 74 20 |ducable |without |
|000000d0| 61 6e 79 20 76 65 63 74 | 6f 72 2d 6c 69 6b 65 0a |any vect|or-like.|
|000000e0| 73 74 75 66 66 2e 0a 42 | 79 20 74 68 65 20 77 61 |stuff..B|y the wa|
|000000f0| 79 2c 20 73 6f 6d 65 20 | 74 68 69 6e 67 73 20 77 |y, some |things w|
|00000100| 65 72 65 20 6e 6f 74 20 | 66 75 6c 6c 79 20 72 65 |ere not |fully re|
|00000110| 63 6f 67 6e 69 73 65 64 | 2e 20 54 68 65 20 53 6f |cognised|. The So|
|00000120| 6e 79 20 63 68 69 70 20 | 69 73 20 61 6e 20 41 53 |ny chip |is an AS|
|00000130| 49 43 2c 0a 49 20 73 75 | 70 70 6f 73 65 20 74 6f |IC,.I su|ppose to|
|00000140| 20 67 65 74 20 6d 6f 72 | 65 20 69 6e 66 6f 72 6d | get mor|e inform|
|00000150| 61 74 69 6f 6e 20 61 62 | 6f 75 74 20 69 74 20 66 |ation ab|out it f|
|00000160| 72 6f 6d 20 43 6f 6d 6d | 6f 64 6f 72 65 3b 20 6f |rom Comm|odore; o|
|00000170| 72 20 73 69 6d 70 6c 79 | 2c 20 63 6f 6d 70 61 72 |r simply|, compar|
|00000180| 65 0a 74 68 65 20 64 69 | 61 67 20 77 69 74 68 20 |e.the di|ag with |
|00000190| 61 6e 20 6f 6c 64 65 72 | 20 31 35 34 31 20 72 65 |an older| 1541 re|
|000001a0| 6c 65 61 73 65 27 73 20 | 6f 6e 65 2e 20 54 68 65 |lease's |one. The|
|000001b0| 20 6f 74 68 65 72 20 6e | 65 77 20 63 68 69 70 20 | other n|ew chip |
|000001c0| 28 2e 2e 2e 49 20 64 6f | 6e 27 74 0a 72 65 6d 65 |(...I do|n't.reme|
|000001d0| 6d 62 65 72 20 69 74 20 | 6e 6f 77 29 20 63 6f 6e |mber it |now) con|
|000001e0| 74 61 69 6e 73 20 73 6f | 6d 65 20 6d 6f 72 65 20 |tains so|me more |
|000001f0| 66 65 61 74 75 72 65 73 | 20 74 68 61 6e 20 74 68 |features| than th|
|00000200| 65 20 6f 6c 64 65 72 20 | 63 75 73 74 6f 6d 2d 63 |e older |custom-c|
|00000210| 68 69 70 3b 20 49 74 0a | 73 65 65 6d 73 20 74 6f |hip; It.|seems to|
|00000220| 20 63 6f 6e 74 61 69 6e | 20 74 68 65 20 77 68 6f | contain| the who|
|00000230| 6c 65 20 63 6c 6f 63 6b | 2d 64 69 76 69 73 6f 72 |le clock|-divisor|
|00000240| 20 70 61 72 74 2c 20 77 | 68 69 63 68 20 77 61 73 | part, w|hich was|
|00000250| 20 64 6f 6e 65 20 77 69 | 74 68 20 61 20 37 34 4c | done wi|th a 74L|
|00000260| 53 31 39 33 0a 69 6e 20 | 6f 6c 64 65 72 20 76 65 |S193.in |older ve|
|00000270| 72 73 69 6f 6e 73 2e 20 | 2e 2e 2e 54 68 69 73 20 |rsions. |...This |
|00000280| 77 61 79 2c 20 49 20 73 | 65 65 20 76 65 72 79 20 |way, I s|ee very |
|00000290| 68 61 72 64 20 74 6f 20 | 6d 6f 64 69 66 79 20 74 |hard to |modify t|
|000002a0| 68 65 20 75 6e 69 74 20 | 74 6f 20 72 65 61 64 20 |he unit |to read |
|000002b0| 4d 46 4d 0a 64 69 73 6b | 73 2c 20 66 6f 72 20 65 |MFM.disk|s, for e|
|000002c0| 78 61 6d 70 6c 65 20 3a | 2d 28 0a 49 20 64 6f 6e |xample :|-(.I don|
|000002d0| 27 74 20 74 68 69 6e 6b | 20 69 66 20 69 74 27 73 |'t think| if it's|
|000002e0| 20 66 72 65 65 20 6f 66 | 20 73 6f 6d 65 20 66 75 | free of| some fu|
|000002f0| 6e 6e 79 20 62 75 67 73 | 2c 20 73 6f 20 70 6c 65 |nny bugs|, so ple|
|00000300| 61 73 65 2c 20 73 65 6e | 64 20 63 6f 6d 6d 65 6e |ase, sen|d commen|
|00000310| 74 73 2f 0a 66 65 65 64 | 62 61 63 6b 73 20 61 62 |ts/.feed|backs ab|
|00000320| 6f 75 74 20 74 68 69 73 | 20 6f 6e 65 20 69 66 20 |out this| one if |
|00000330| 59 6f 75 20 74 68 69 6e | 6b 20 69 74 20 73 6f 2e |You thin|k it so.|
|00000340| 0a 45 6e 6a 6f 79 2e 2e | 2e 20 2e 2e 2e 57 65 6c |.Enjoy..|. ...Wel|
|00000350| 6c 2c 20 49 20 68 6f 70 | 65 2c 20 61 74 20 6c 65 |l, I hop|e, at le|
|00000360| 61 73 74 20 59 6f 75 27 | 6c 6c 20 6e 6f 74 20 68 |ast You'|ll not h|
|00000370| 61 76 65 20 74 6f 20 74 | 72 61 63 65 20 74 68 65 |ave to t|race the|
|00000380| 20 62 6f 61 72 64 2c 20 | 77 68 65 6e 0a 74 72 79 | board, |when.try|
|00000390| 69 6e 67 20 74 6f 20 6d | 61 6b 65 20 67 65 74 74 |ing to m|ake gett|
|000003a0| 69 6e 67 20 75 70 20 61 | 20 64 65 61 64 20 64 72 |ing up a| dead dr|
|000003b0| 69 76 65 2c 20 61 73 20 | 49 20 64 69 64 2e 2e 2e |ive, as |I did...|
|000003c0| 20 38 2d 7c 0a 0a 20 2c | 0a 48 61 72 73 66 61 6c | 8-|.. ,|.Harsfal|
|000003d0| 76 69 20 4c 65 76 65 6e | 74 65 0a 4c 65 76 65 6e |vi Leven|te.Leven|
|000003e0| 74 65 40 4d 69 2e 53 74 | 75 64 2e 50 4d 4d 46 4b |te@Mi.St|ud.PMMFK|
|000003f0| 2e 4a 50 54 45 2e 48 55 | 0a 0a 2d 2d 2d 2d 2d 2d |.JPTE.HU|..------|
|00000400| 2d 2d 2d 2d 2d 2d 2d 2d | 2d 2d 2d 2d 2d 2d 2d 2d |--------|--------|
|00000410| 2d 2d 2d 2d 2d 2d 2d 2d | 2d 2d 2d 2d 2d 2d 2d 2d |--------|--------|
|00000420| 2d 2d 2d 2d 2d 2d 2d 2d | 2d 2d 2d 2d 2d 2d 2d 2d |--------|--------|
|00000430| 2d 2d 2d 2d 2d 2d 2d 2d | 2d 2d 2d 2d 2d 2d 2d 2d |--------|--------|
|00000440| 2d 2d 2d 2d 2d 2d 2d 2d | 0a 0a 53 6f 6d 65 20 70 |--------|..Some p|
|00000450| 61 74 63 68 65 73 2e 20 | 49 20 66 6f 75 6e 64 20 |atches. |I found |
|00000460| 61 20 62 75 67 20 69 6e | 20 74 68 65 20 73 63 68 |a bug in| the sch|
|00000470| 65 6d 61 74 69 63 09 00 | 69 61 67 2c 20 74 68 65 |ematic..|iag, the|
|00000480| 72 65 20 77 61 73 20 61 | 20 6c 6f 73 65 20 63 6f |re was a| lose co|
|00000490| 6e 6e 65 63 74 0a 62 65 | 74 77 65 65 6e 20 74 68 |nnect.be|tween th|
|000004a0| 65 20 63 75 73 74 6f 6d | 20 63 68 69 70 27 73 20 |e custom| chip's |
|000004b0| 4d 54 52 20 70 69 6e 20 | 28 31 33 29 20 61 6e 64 |MTR pin |(13) and|
|000004c0| 20 74 68 65 20 75 50 61 | 32 30 30 33 27 73 20 36 | the uPa|2003's 6|
|000004d0| 2e 20 70 69 6e 2e 20 53 | 6f 20 74 68 69 73 20 69 |. pin. S|o this i|
|000004e0| 73 20 61 0a 66 69 78 65 | 64 20 76 65 72 73 69 6f |s a.fixe|d versio|
|000004f0| 6e 2e 20 27 39 37 2e 30 | 31 2e 30 38 0a 0a 4c 65 |n. '97.0|1.08..Le|
|00000500| 76 65 6e 74 65 0a       |                         |vente.  |        |
+--------+-------------------------+-------------------------+--------+--------+