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I am having a strange audio issue when I use my MacSD internally in my IIsi. I modified the IIsi to have term power to the internal SCSI connector by bodging from the DB25 external SCSI connector, and I also tried powering the MacSD with an external USB wall adapter. The machine works fine...

I have a CC that I suspect has a bad CUDA chip. I found the list below of CUDA variations from an old post. Does anyone know if any of these are compatible with the CC? It appears the CC is the only machine that uses the 341S0417. From what I can find online 341S0788 seems to be used in...

I recently installed my Performer clone accelerator into my Plus and have found it seems to be incompatible with my BlueSCSI v1.1. Does anyone know if there are any SCSI emulators that work with an accelerated Plus? I know the Plus's SCSI implementation is a bit non-standard so they have...

I just finished my build of a Performer accelerator clone for the Mac Plus/SE. Enormous thanks to @Bolle , he reverse-engineered an original accelerator and posted the board file online, along with the GAL files. Thanks to DrGonzo, his thread on 68kMLA about his Performer build inspired me to do...

A couple years ago I bought a 512k with a non-working HyperDrive 20 internal HD. On first inspection it was obvious a component on the MiniScribe 8425 controller board had failed and damaged the board. I found a replacement drive, sold as working, but the new drive also showed no signs of...

Is anyone currently planning an SE/30 reloaded group buy? If not, would anyone be interested if I put together an order?

I am looking to replace the onboard RAM of my IIsi, I believe some of the chips may be failing. I found some chips on eBay that I think will work, but I'm hoping someone with more knowledge can confirm. My IIsi currently has OKI M514256A-80J chips, the ones I found are Fujitsu MB81C4256A-70PJ...

I'm doing some troubleshooting on my IIsi board. I put it under the microscope this morning and took a bunch of photos so I can sit down later and take a very close look for broken traces, however as I was taking the photos all the traces looked in excellent condition, even the ones around the...

I just finished recapping my IIsi logic board and PSU yesterday and it was working great. I had powered it up and down at least 10 times, it worked great each time. This morning I had it powered on and a circuit breaker in our apartment tripped. This particular breaker tends to trip...

I'm looking at this old 16mhz 68000 accelerator for an SE, and I can't quite figure out what's going on with the PDS connector. I know this style of male PDS connector with just exposed pins and no plastic surround wasn't uncommon, @JDW said he has a board with a similar connector. What I...

I have a 512k with a 20mb HyperDrive I picked up a few months back, the HyperDrive was non-functional when I bought it. The drive itself did not work, a component on the controller board (the board on the drive, not the HyperDrive daughterboard) had melted and damaged the board. I just picked...

I recently picked up an IIsi off the local classifieds as a project, knowing it (and the PSU) will need a recap. Someone had already done the 50mhz oscillator upgrade, so that was a plus - until I cleaned the board and started inspecting it. When I turned it over I saw corrosion around the...

I thought someone here might be interested in some benchmark results from my accelerated SE. The machine has a Radius 25mhz 68020 accelerator with 68881 FPU. 4mb RAM, spinning-platter HD. The SE/30 used in the tests has 8mb RAM, Mac SD drive, and a Radius 40mhz 68030 accelerator. Both...

I have a Plus with a Total Systems '030 accelerator that's giving me some problems, I'm hoping someone here might be able to help. I've had the board for years, it sat for a very long time without being used, and a couple years ago when I tried to remove it from the machine, the plastic Killy...

I picked up an SE a while back with a non-functioning internal HD. Long story short, today I realized the drive is an aftermarket upgrade from GCC. The machine was originally a dual 800k floppy machine, and this kit came with the drive, a badge for the front, and a strip that covered the upper...

I was using my SE/30 earlier to run some benchmarks with and without a Daystar '030 40mhz accelerator. The machine has a MacSD and recently recapped logic board. The battery has been removed. It was working fine for a couple hours. I was running Speedometer 4.02 to compare some benchmarks...

Well, I unexpectedly picked up a 512k with an internal HyperDrive 20 yesterday. Per the serial number decoder, the machine started life as a 128k in March '84. It currently has 512k ram and an 800k floppy drive, so I assume it has been upgraded to a 512ke, though I haven't taken the logic...

Yesterday morning I did my daily "Macintosh" search on OfferUp (ok, not actually Craigslist), and a new ad for an old Mac popped up. It was poorly written, didn't say anything about the computer other than it was from 1984, and the price wasn't fantastic. It was clearly a 128k or 512k, I...

I recently took an old Plus out of storage, it hadn't been used in probably 25 years. I took the 800k drive out today and cleaned and lubricated it, I also very gently cleaned the heads with 99% alcohol and a q-tip. I didn't loosen the screws for the motor, so I shouldn't have un-aligned...

Hi, I'm having some issues with my ADB keyboard. The model is "Apple Keyboard", it's the style with a power button and no function keys. It's not the slimmer IIgs style. There seems to be something going on with the left keyboard port. It exhibits the following behavior: Mouse plugged into...