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Not having seen the actual parts, this looks like an ordinary DIP socket to me.

There are some things where the G3 makes a huge difference. A good example is emulating Super Nintendo with SNES9X. I remember on my 6100, playing SNES before I got my G3 was absolutely terrible and after the G3 it was like a real SNES.

It should be possible to stay backwards compatible with the older SIMMs and not have to keep reflashing the programmer for different SIMM revs. Here are some ideas: Mod Programmer firmware only: - Trial and error both unlock methods, and continue on with the one that worked - Find some other...

I never can keep track of who can do what on this board, so I default to noob suggestions if I don't remember - I'm not trying to talk above or below anyone. It's good to hear you have that under control.

Flybacks are notoriously tricky to remove properly - have you done this before? You need a lot of heat and a good solder vacuum - and no prying - to get it out. I would seriously consider waiting till she blows right up, but if you want to see if this makes your problem go away, it might be...

There are some great YouTube videos about fine-pitch soldering. You do not and should not have to solder pins individually, except for soldering the corners at first to keep the chip in place. You will soon see that this is WAAAAAY easier than when you soldered PLCC sockets onto the previous...

I do plan to purchase a programmer and some SIMMs from you eventually dougg3. They are fantastic work. All of my stuff, Macs included, has been packed up and stored for the last 2 years. Hopefully soon I will move to a place where I can actually have room to take these things out and play...

This RAM/ROM PDS board is a really cool idea jt, and if it works it could certainly integrate all sorts of other upgrades into the future through more revisions. It worries me that the address lines of ROM are not continuous with the address lines of RAM in the Mac IIci as seen here. It could...

If you are ever thinking about using a regulator to go from 5V down to 3.3-ish V, you can use series diodes instead of a regulator. Unlike series resistors, diodes will have the pretty much the same voltage drop over a range of different currents. The regulator will get you closer to 3.3, but...

PrintToPDF works fine for me with this exact setup (did not test any other setups): Host = Power Mac G4 MDD, OS X 10.4.11 Basilisk II b17 68030 with FPU Quadra 700/900 ROM Mac Model: Mac IIci 640x480, 32-bit System 7.5.3 I printed a ReadMe in SimpleText and it produced a PDF file that...

256MB of ROM could provide for some interesting hardware-level video projects. The only reasonable way I can imagine to get that much ROM is to use a serial ROM, like that from a flash drive. To make it parallel, the only reasonable thing I can imagine is to put a program into a small parallel...

You could make a ROM card for the IIci's cache slot with a multitude of ROM SIMM slots, each multiplexed out to a separate address space. Then populate it with a handful of your ROM SIMMs. I bet you could fit 8 of your 2MB SIMMs on there for 16MB ROM -- which is possible because the cache slot...

If any place has something like that, it's ResExcellence: http://www.resexcellence.com/archive_software/index.shtml

Some old microcontrollers have very limited RAM addressing so they page around to different chunks of RAM. Is this a similar concept? It seems confusing and top-heavy to address RAM this way.

You can't make an actual, normal installer disc of any Mac OS unless you copy an existing installer disc. With OS 9 you can make a copy of the System Folder, burn it to a CD, whatever you want, and it will be bootable when you copy it back to a hard drive, i.e. a manual install. Making the CD...

This DOES NOT work that easily with any version of Mac OS X unfortunately. You can't copy the OS X System folder anywhere and expect it to work because of permissions, hidden folders, etc. You can make a disk image of your hard drive using Disk Utility, and then at any point in the future, you...

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It is perfectly valid to speculate that the 2GB limit is not directly a memory controller limitation, but nothing is proven by the fact that OS 9 and OS X have different limits. With any sort of complicated digital device, there are often multiple limiting factors. It stands to reason that the...

Version 2.0.1 is the proper Apple Hardware Test for the MDD G4 with FireWire 800. There is another version that says it works on the MDD, but that's only for the non-FireWire 800 version. Very confusing. Here's a download link from Apple for AHT 2.0.1...

Thanks for clearing up the info about the address pin dougg3. We know for a fact that it works properly again. (I forgot some details where you already proved it!) So I guess the OS version seems pretty much involved in this ROM Disk issue: - MicroBug crashes when accessing past the 1MB mark...