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Nice + Just started the process of gathering the bits for a Bolle Reloaded board myself. After fixing traces on the better of two machine, I decided I'd be chasing them forever on the worse one. No harm in having the battery in, it may well work just fine, but won't do any harm if it doesn't...

That looks like the perfect programmer for the job, chip drops straight in, no fiddly connections to make. The source code was written with the avr-gcc toolchain in mind, which sits under the hood of the Arduino framework. I used it directly, partly because I always do and partly because it...

Hey @Lyokian159 I've not tried building on Windows but that would be doable. I can certainly upload a pre-built binary to github if you like, save having to work that bit out. Flashing an ATTiny from Windows shouldn't be too much trouble, I know of a few different ways of doing it. You could...

Hey Daniel, Sorry I've taken so long to reply, I either missed or didn't get a notification for your post. I've not seen any problems with SCSI mounting myself. I've been using a ZuluSCSI too. I did manage to select a drive which didn't exist after swapping SD cards as the startup disk once...

Solved! I took a step back over Christmas and had a nose around the schematic again, looking for places where logic between the RAM and the floppy disk meets. One of the PALs, UH7, manages the write signals to the RAM banks. As well as inverting the write signal from the floppy controller. The...

@Bolle I'm sure I've mentioned before but amazing work! I've finally run out of patience with my battery damaged logic board and going to order some shiny new ones :-) Couple of PCB Assembly questions I don't want to screw up: Edge Rails/Fiducials: Added by JLCPCB? C33 C34 C44 C67 C73 -...

I've got a pile of battery damaged SE/30's I've been slowly resurrecting. One of them needed a new RTC and I wondered if it could be replaced by a microcontroller. Turns out a few smart cookies had beat me to it and published various versions of firmware for the Atmel ATTiny85 which is a...

Ahh that would make sense.....I've been trying to build my own based on the few examples I found online. One of them mentioned a max serial clock of 20Khz...I'm seeing closer to 250Khz. Thanks for backing up my suspicion that the clock rate was increased. I failed to do the basic maths or how...

@robin-fo Did you get this working on your SE/30 in the end? I've got a few battery bombed ones which I'd like to swap out the RTC on.

Still working on this. Found that if I connected the logic board to the analog board of my working machine, with the help of an ATX PSU extension lead, thereby using its PSU and display all is well. Three floppies written without any errors. I recapped both the analog board and the PSU of the...

@techknight Very nice work. If you end up doing another it would be good to get some footage of your chip removal process, especially the processor. And not forgetting that pesky metal plate at the back. @JAG Did you end up placing an order for some boards? If you did, have you gone for the smd...

Possibly?....I feel like I may have fallen down the rabbit hole on this one....upside down....and possibly backwards. Would love to get it fixed not that I plan to use the floppy much, although having a fully functional machine would be good. At the same time I've been staring at it so long...

The bit thats been getting me is that the buffer corruption only appears following a disk write. It's possible to read and write a pattern into ram and have no issues - but writing the same pattern followed by a disk write leads to corruption. I haven't removed them yet as I don't have any...

Tried my little test program with System 7.5.5 (I was using System 6.0.8 until now for its faster boot time following all my crashes :-( ) Exactly the same problem...almost. With the default 24 bit addressing, as soon as I kick off a disk write the system locks up. Mouse and all, doesn't...

So far that's the most plausible explanation. To the phone book!.....time to book an exorcism :p

Added a disk access step to my noddy little test program, requesting the Floppy Disk Driver via the Device Manager write the first sector of a floppy disk with the first 512 bytes of my test buffer. As soon as that write completes, the disk and buffer both have the identical corruption in them...

@Crutch Thanks for the explanation! - I wondered how it would behave if the target area was changed by an interrupt. Bit more tinkering with MacBugs. I wondered at what point the RAM gets messed up. I started DiskDup and loaded the original image to be written to disk. Then jumped into...

@Corgi I figured as much, the docs hinted at an automated single step with checksumming to detect changes. Pretty neat for the classic rouge pointer blatting over things but maybe not enough to catch the mess I've got going on :p The corruption on the floppies changes each time, in that it's...

@Corgi Haha I was wondering if it might be. I had a tinker with Macsbugs last night, stopping DiskDup after it loaded the image, and had a search for it in RAM. Before writing it looked ok, but after it had the garbage in. Was hoping I might be able to set a watchpoint but alas them be modern...

It seems the SWIM may not be to blame after all. I did what I was initially avoiding and connected a logic analyser to address, data and control lines used by the SWIM and captured a floppy being written by DiskDup....250MB of capture file for a 1.5MB floppy :p After producing a floppy, I...