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    Found a Neat Mod From Back in The Day in My 128k

    Newlife/NewBridge had a 128KE/512KE upgrade board with eight (8) SIMM sockets on board and a plethora of jumpers for configuring the RAM configuration. The RAM limit was still 4MB, but if one had a bunch of 256K SIMMs laying around, one could use those in the upgrade. And the Mac's memory...
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    How much of the 128K/512K hardware has been reverse engineered?

    I think the issue is that it is not a proper replacement for the Mac II family, but I think Kai knows with more confidence. Above, max1zzz stated that the D1307 was a replacement for the clock in the Mac II family (unless I misunderstood) and that is what triggered the flurry. D1307 looks...
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    Mod: Quadra 660AV 2 MB VRAM Upgrade

    Perhaps put plated vias in the pads, so if they fail to make connection, you can solder down the hole? It reduces your pad to pad area but provides a more reliable method of insuring solder contact.
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    How much of the 128K/512K hardware has been reverse engineered?

    Hmmm. Looks like the DS1388 might work as a replacement -- at least feature-wise. I haven't checked the command structure. It would probably require a GLUE chip in between to translate.
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    How much of the 128K/512K hardware has been reverse engineered?

    Well now you have you me confused. My notes have a 343-0042-B at UM5 on the IIcx and it is a DIP8. And I have a 3440042B at UK4 for the SE/30 and again a DIP8. But the datasheet you shared clearly shows a PLCC20. Are you able to resolved the confusion? Later: Ah, but looking more closely...
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    How much of the 128K/512K hardware has been reverse engineered?

    Is that the same as the Apple 343-0042-B, then? That's what I have down for the SE/30 Clock chip, but it is also an 8 pin DIP, and I wouldn't be surprised if Apple just licensed the design and changed the part number. BTW, the link way above is to an Analog Devices part at Digikey who is out...
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    Flash the raid card, to AEC-6280M from 6880M, to 6260M from 6860M

    As I recall there were three or four resistors to move as well in the conversion process. The feature that makes the 6880M unique and wonderful is that it provides RAID support in both OS9 and OSX. In other words, you can create a single RAID (0 or 1) that can be used on both Classic and OSX...
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    So, five Mac IIci walk into a shop...

    Great work on the IIcis, but more importantly, I'm jealous of your workshop. Looks wonderful.
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    How much of the 128K/512K hardware has been reverse engineered?

    I think the logic equations for the PLDs (PALs?) are out there. Maybe published in Mactech at some point. I don't know about the IWM. I saw someone claim that Kai had reproduced the SWIM, but I haven't seen any such announcement -- which doesn't mean much given my chronic absence lately...
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    Found a Neat Mod From Back in The Day in My 128k

    It wasn't me. Or if you did, you never told me and it never arrived. :)
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    dad asked "do you want this junk in my garage?"

    It might be useful to mention which part of Texas. If he gets to stuff that isn't worth shipping, there might be someone local interested. Texas is a big state.
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    Breaking the 36MB RAM limit on the LCIII

    Hey, jt, sorry if i misunderstood you. Also, I think I mistook who wrote your posting. Bleary brain.
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    Breaking the 36MB RAM limit on the LCIII

    How were blogs superior to newsgroups? Newsgroups were the forums of the early days. And they had the advantage of not being at the whims of their creator for how long they persisted. In theory, everything ever posted in Newsgroups should still be available. Of course, once they lost...
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    Notes on re-pasting the Mac Mini G4 CPU

    Is the fan management not proper under OS9? Otherwise, how are you liking 9 on the Mini? I have a few G4 Minis and I vastly prefer OS9 to OSX, but there are always compromises with the mods needed to run OS9 on unsupported machines...
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    Everything you wanted to know about the BBU, but were afraid to ask...

    Hard to read tone in writing... I'm pretty sure you're having me on, but the tubes were between the back rooms and the front mission control area. So after we made a burrito run we'd send the camera-ready people their burritos through the tubes. Access to the main room was heavily...
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    Breaking the 36MB RAM limit on the LCIII

    I don't remember (probably didn't) seeing such discussion. It seems to me that each bank of four SIMM sockets on the SE/30 could be replaced with a single 64 MB 72-pin SIMM (or one bank of a 128 MB SIMM). I don't know if that would cause any current loading issues. You'd be loading the...
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    Breaking the 36MB RAM limit on the LCIII

    It's more than okay with me. I'm glad to see it preserved. MacGurus might have a copyright depending on the terms of their forums, but I doubt they'll notice and they probably wouldn't mind anyway.
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    Breaking the 36MB RAM limit on the LCIII

    Been using this handle since the 90s...
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    Breaking the 36MB RAM limit on the LCIII

    Heh, I wrote that posting at MacGurus. I was a moderator there a long time ago. I actually still had moderator privileges on their forums until they took them down. There was so much excellent information in those forums.... Sigh. I'm glad that posting was preserved at least. You...
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    SCSI Floppy Drives

    <NITPICK> If you count the host controller (the computer) then the SCSI chain support 8 devices. IDs 0 -7 are available, but 7 is (almost) always occupied by the host controller. <\NITPICK>