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tf5), v Appendix D: SCSI Hard Disks wants a "terminator" on either end of the cable to prevent "ringing" and other signal troubles. You want exactly one on either end of the 50-pin "true SCSI"; two is too many, and may actually cause damage, by making the chips that drive SCSI work too hard. Zero is too few, as the signal will be lost in all the ringing and noise. What this boils down to is when you daisy-chain hard disks to an Apple hard disk, you have to determine if the Apple hard disk is terminated, and depending on how you've hooked things up, make it so that the last disk drive on the 50-pin "true SCSI" cable is terminated, and no others are. You'll probably have to pull the terminator packs off any present Atari drives. But again, it depends on your present rig. Maybe you'll want the Apple drive in the middle, in which case, it should not be terminated. You'll also have to do some creative cabling to get the 25 wires out of the Atari drive and to the Apple drive connector. For portability between the Mac and Atari, you might want to use an unterminated Apple drive, and terminate with other drives on your Mac and Atari. Or, for a single drive, terminate it. (You're beginning to see why we were hesitant to tell people all this, right?) To transfer between a Mac and the Atari, you must format the hard disk on the Mac. You're going to find that each and every Mac hard disk manufacturer makes their own formatter, and they're all a little different, unlike the Atari, where everyone's formatter pretty much works with everyone else's hardware. I use Supra's Mac SCSI formatter for the Mac brand of hard disks; I have had zero luck with other ones. Finally, you have to set the SCSI ID number on the Apple unit to something that doesn't conflict with the Atari devices. Atari's SLM804 Laser Printer uses 7, and has just been changed to use 5, because Ken Badertscher's birthday was on the fifth. Your present hard disk is probably 0, but check. After all this fun, you can check for a valid connection several ways. First, when you press RESET or poweron, the Atari will zip through all connected and working SCSI devices, 0-7, and briefly '1ight them up." It's looking for "partition sectors" on all connected disk drives. You should see all the lights flash on your connected units; if none flash, you've locked up the SCSI bus (usually, termination troubles, or two same-numbered SCSI devices). If one doesn't flash, 141
Appendix D: SCSI Hard Disks that particular unit is miswired or bad or .. ? When you bring up the Spectre's first menu, it should also poll every hard disk, looking for Spectre partitions, and if it's been formatted on a Mac, the drive will show up on the Spectre hard disk pull-down menu. (Note that you can select and deselect SCSI !D's within that menu.) Is this fun, really? When I had to do this, I made a 25 to 50 pin cable the usual way (ribbon cable and brute force). It would work fine with one controller, but not with two. I then called Supra, got one of their Mac disk cables (which is a 25 to 50 pin cable, with the essential termination power supply that you hook onto the +5 supply), and their unit worked fine with multiple drives. I'm still not entirely sure why theirs worked and mine failed with two drives; when you enter SCSI, you're entering the land of Voodoo. Supra drives now feature a 25-pin "daisy chain" connector for SCSI that is Apple SCSI. Hence you've got a fighting chance to plug in an Apple drive to that and work, provided you get the termination right. Anyway, if you're confident with SCSI and this is all old hat, go ahead; if not... For those of you trying to make up your minds: I just got done failing to hook up an Adaptec 4000 controller to a Mac. I still don't know why it doesn't work. Its brother Adaptec 4000 works just fine on the Mac .. Bad cable? Bad connector? Bad karma? I don't know. 142
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The PreDlier Macintosh EDlulator (t
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Introduction Introduction: There an
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Table of Contents Introduction. . .
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If$}, 'tbI Introduction tridge base
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Introduction Mac, you will notice t
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v A Preview Of COllling Attractions
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\tb1 Requirelllents and Other Thing
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Requirements The "Finder" is the pr
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v .. Compatible Printer Driver Requ
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\tb,V Spectre and Mac Disk Formats
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& V Getting It Going Getting It Goi
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\tlJ Getting It Going Even if the c
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tf5l\ V Mac mode to see if the cart
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Getting Mac Disks to Spectre Format
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lect all the disk icons and drag th
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J nter[ude 'ITiree Jennifer and the
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If3). \!;bI Mac Mode Stuff You Need
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• There's other tricky key combin
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the change happens so swiftly that
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tf5}. v Mac Mode So how do you make
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tfSl\ \tb,Y Mac Mode Now, you ask,
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Mac Mode On the ST, the Command key
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& . . .. . \tbI Mac Mode Atari also
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& . . . .. \t\"Y Mac Mode with soun
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& \!!bI Mac Mode does on the Mac ($
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o Mac Mode Hence, if both Macdots a
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Mac Mode On the Mac, this works by
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Mac Mode We do allow you to format
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dS), v 'Dynamic 2(JI!Jv{ :J{orror S
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The Spectre Menus Spectre Menus Whe
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\tb1 . ... . Spectre Menus (memory
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& V Spectre Menus of cache memory,
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Hard Disk Menu Figure 9 Spectre Men
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i& \tb1 set to, and tum it off. Spe
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Spectre Menus (see Figure 9, page 7
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tf.i!\ Spectre Menus GCR. Finally,
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Page 100 and 101: Hard Disks and Spectre Note that it
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Page 106 and 107: Printers and Spectre Printers and S
Page 108 and 109: characters) or drawings (if you're
Page 110 and 111: o Printers and Spectre + Certain pr
Page 112 and 113: o Printers and Spectre ports. Shift
Page 114 and 115: v Printers and Spectre Mac mode) wh
Page 116 and 117: 0····· t Life In rrhe 1(jd Lan
Page 118 and 119: pin cabfe, 'D'B-25 cabfe, or a Litt
Page 122 and 123: Transverter Transverter Transverter
Page 124 and 125: & V Figure 16 Boards or other onlin
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Page 128 and 129: \tbI Transverter all the settings t
Page 130 and 131: 0·· ···· .. .. Transverter no
Page 133 and 134: [ nter{ude 'Eigfit 126
Page 135 and 136: Support If we've established a Gadg
Page 137 and 138: Appendix A: Sources Source for illt
Page 139 and 140: Appendix A: Sources 132
Page 141 and 142: Appendix B: Special Function Keys S
Page 143 and 144: Appendix C: Connections o 136
Page 145 and 146: Appendix D: SCSI Hard Disks This "t
Page 147: Appendix D: SCSI Hard Disks 140 Ata
Page 151 and 152: Appendix E: Hard Disk Tips " .. You
Page 153 and 154: Appendix E: Hard Disk Tips \0 .. Ap
Page 155 and 156: Appendix F: UltraScript Tips o and
Page 157 and 158: Appendix G: Crashing came up with a
Page 159 and 160: Appendix G: Crashing Taking your Me
Page 161 and 162: Appendix H: License A I\liJ This p
Page 163 and 164: Index J Jeffco Com. Association K K
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