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I have only found the SE/30 schematics. Are you saying you have the other 12 schematics that are for sale on his site?

BOMARC is out of business and will no longer sell you schematics. Charles Phillips (Uniserver) is selling BOMARC schematics, and it is unclear if he has permission to do so. I keep thinking I should buy them anyway before they disappear completely. But the total cost for all the ones he has is...

techknight's message prompted me to contact Michael McMaster about possibly making the SCSI2SD disk access data available externally. Turns out that he designed a UART header into v6 boards for future expansion purposes. Right now it's unused, but he said that he would accept contributed code to...

Yeah I would like to go the synthesis route. Personally, I'm no audio expert and wouldn't be able to just recreate the sounds by ear. So my first step regardless is to record samples so I can see what is going on in the waveforms. Optimally we would have access to seek positions and read/write...

Shhhh, you're blowing up my stealth development project! Oops, guess it's not stealth any more. I have been setting aside various working hard drive models to use for high-quality recordings at a later date. Including Quantum, MiniScribe, Rodime, etc. The first purpose is for historical...

Each ADB device type (keyboard, mouse, tablet, etc.) has a default address. When the device powers on, it assumes a bus address based on what type of device it is. When the Mac ROM loads, it detects address collisions and performs address reassignment. So a proper ADB switch would need to...

So, a few things have happened since my last update. The good news is that my bootloader is basically working. There are a couple little tweaks left to implement. But it does its job of updating the board firmware. I was being clumsy with my bench power supply and accidentally released the...

Thanks for the comments everyone. I'm still working on the bootloader which has had a lot of road blocks and detours. It's important to get the bootloader ready because it is the way that you'll be able to update the software when I develop new features. The original one I intended to use turned...

No. Ubuntu is a modern operating system designed for modern PC hardware. Mac OS (classic) is a 20+ year old operating system made for a completely different computer architecture.

That's cool. Just wasn't sure if you hadn't seen it or wanted to do it yourself.

I don't know what you mean by "the piece in between." I found basically everything needed to implement ADB Busboy in Guide to the Macintosh Family Hardware and that tech note you linked to. Read the ADB section in Guide to the Macintosh Family Hardware and if you have any specific questions I...

That's definitely the way to go. I do the same thing. What did you do to clean the corrosion off the pins? I've found vinegar works ok for some light corrosion but it hasn't worked for me for more than very slight buildup. I didn't remove the chips though! Haha. The last board I recapped I...

Oh, he was quoting joethezombie but the smoking remark was referring to CelGen. I agree CelGen's post baselessly attacked SCSI2SD and was out of line.

This is very unclear. It sounds like you're agreeing with joethezombie, while accusing him of being high. Unless you're saying that the SCSI2SD v5 hardware is open source? If so, you should have Inertial Computing correct their web site, which says "Note: The hardware design for SCSI2SD v5 not...

I keep my list of capacitors at https://www.hobbesnet.org/wiki/macintosh:logic-board-capacitors I thought I had added the IIsi, but I guess not. Anyway, the mouser links for compatible capacitors are there. I only use capacitors that come in the same package and have the same characteristics as...

Put polyimide tape on the plastic components to block the heat. To avoid blowing up the capacitors, pre-heat the board by running the hot air over it from a greater distance for a while before heating up individual caps. You should do that anyway to reduce overall thermal stress.

Yes, please upload that software. I do not see it on macgarden or vintageapple driver museum mirror... and those hard drives are all on their last legs.

I finished assembling and testing the prototype PCB. Everything is working as it should. I did make a dumb mistake and wired up the LED backwards. (I suppose I didn't pay much attention to that because what kind of idiot screws up an LED?) That's what the patch wire in the photo below is for. I...

Additionally, you should clean the heads with alcohol on a cotton swab. Be extremely careful not to lift the head any further than the mechanism lifts it. If you do, it will never be able to close far enough to read a disk again.

In general, Macintoshes cannot use 5.25" drives. There are a couple exceptions. The Apple IIe card and the PC card allow you to connect a 5.25" drive. Both are somewhat difficult to find and expensive. And neither will work with your Mac Classic. Sorry to be the bearer of bad news. :(