Search results

I only have the LC475 so I can't measure myself. What are the dimensions of the failing supply? Should be easy to print up a 3D enclosure with power inlet/switch in the right place, and one of the available power supply modules inside. Very likely a modern module will fit with room to spare.

I find this stuff fascinating so there's a chance I will look at that too one day. Do you know if they use a documented standard or is it something that would have to be discovered? Another project I have in mind is to do some Mac video conversion. While a stretched image from the DB15 is not...

LVDS from a FPGA

Before the loss of data there was a post about this. I had started making a replacement power supply for my SE/30, because I’m planning on using a FPGA to drive a LCD - no more need for the CRT, or flyback, etc. The h-sync, v-sync and pixel data come out to the fpga as does signal from a rotary...

I have printed this one, it is OK but not durable. You definitely want to print on its side - if the layers are across the direction of flex it won't last long. Unfortunately there's no good orientation, when your buttons are printed for maximum strength the fingers that reach into the mainboard...

The quickest fix is to put a couple of toothpicks broken to length so that they just disappear, into the stripped screw hole. It's like putting expanding plugs into a hole in masonry, the screw will bite into the toothpicks and as they expand it will grab the side of the hole. A better fix is to...

I have a big old external SCSI enclosure with 16-bit 68-pin connectors on it. From what I read the SCSI standard is supposed to interoperate and if the physical connection can be made that should operate as an 8-bit SCSI peripheral also. So if I was to find a Mac 25-pin M to 68-pin SCSI M cable...

How about a floppy drive? I have an external USB floppy drive that I use on my modern Mac though it would work the same transferring from a Windows machine. I format a floppy as a PC disk on the old Mac, write to it on the new Mac, and the old Mac has no trouble copying the files off. Obviously...

A little external USB DAC will work in the G4 mini to take care of audio in and out I think. Mine cost $3 or something crazy and was intended for a Raspberry Pi.

I would feel lucky if I found that for $3k? More lucky still if my wife ever agreed buying an old computer was a good idea! Congratulations! I am really looking forward to the story of diagnosing and bringing it back to life.

Technically even one extra video card is a second card in a SE/30 - the onboard video simulates a NuBus card in slot E. I don't know if anyone has tried adding two video cards but I don't know why it would not work.

I did make a thing for my own use that requires a Mean Well PT65B supply - it might not be so useful unless you are doing something to replace the original video out, but I'm happy to send STL files if anyone wants to print this thing. It's three parts - mainboard is just within the print...

Do you have a crimper? It’s a really important part of the experience, I bought one recently after folding down the tabs with needle nose pliers for years. You don’t have to spend $900 on a real Molex-branded one of course but you must have one!

Interesting - I bet that's for the many CGA or Amiga-style monitors around at the time, if it isn't a proprietary connector for their own monitors. It could be a mirrored display solution - a CPLD with a ROM for configuration, some RAM for a buffer and connection to the PDS slot can easily grab...

I’m looking at C6, originally 1uF. I see on the schematic it is between pin 7 of UB11 and gnd, labelled SND-R-A/D. Below, UB10 has SND-L-A/D with a 0.1uF cap in the corresponding place. Does anyone have any more detail like a data sheet for these chips?   The smallest OS-CON capacitor...

@MrFahrenheit Such disparity between values suggests that component is to lower power supply ripple. It was common for “just in case” layouts to be made especially then when a PCB revision was much more expensive and physical space less important than now. If they could buy power supply ‘A’ for...

Hey congratulations on that setup, I think I saw that on reddit too. It’s hard to find a machine like that now. I was more an Amiga user back in the day - had a 2500 - it’s nice to imagine what it could have been if someone competent (like Apple even) had that to work with. if I had that...

I may bother the pros with questions, but making this happen with a MAX10 FPGA is also partly a personal learning project. I have no clue about where I might get hold of ASIC equations right now :-(

I would really like to develop a new PDS graphics card for the SE/30. The “Toby’ video card is well documented in the available Apple manuals and seems like a good starting point. (Best way to get a card seems to be buy a whole SE/30 that has a card in it. That’s how I got my Radius anyway.)

Personally I would not be interested though clearly many are. There’s a point at which the thing you have ceases to be a Mac or an Amiga and is just a FPGA or ARM in a retro case, and at that point I think a software emulator is more desirable. Also I’d hate to see the bitter divisions and FUD...