Mac SE: no image works with the BlueSCSI V2 internal

[theshinyknight]

I have been trying to make this to work with no luck so far.

• Kit BlueSCSI V2: soldered only the jumpers for power and for termination.
• Using a Mac SE with 4 MB of RAM; removed the internal HDD and attached the BlueSCSI to the connector.

When I power up the mac, it show the floppy with the question mark icon; I tried all the images available on the "image" section of the instructions and none worked. Had one image only, and multiple images.

Made a ini file to enable verbose log and try wifi and it works fine, the card is recognized and same goes for the images on it.

There is no issue with the naming either; I used the default names

When I test these images with Basilisk II on a windows machine, they run just fine; the SD card is just fine too from what I can tell, and has no errors.

What am I missing? Here is the log file. Thanks

log.txt

[erichelgeson]

Have you gone through every step in the Troubleshooting guide yet? Please review each step carefully and take them to rule out easy things.

Simplify the scenarios here too - just 1 image from the Wiki page, just pick the 7.0.1 or 6.0.8. No network adapter.

In the log I don't see the mac even try to get a selection on the image 0 to check if it's valid. Please review the soldering, even on the SMD chips you did not install to validate.

[theshinyknight]

Thanks for the reply; I went through the troubleshooting steps and used one image only without network too.

The reason why I tried networking was to check the IO on the Pico to see if there was any issue on it, so I can exclude I have a bad Pico.

What is a "healty" log looks like? The light on the board never blink except once during boot, so I can't even tell if the mac is trying to read from it or not.

Also the mac works fine with a standard SCSI drive, so I will check the soldering joints at this point. Is there any voltage I can check to see if I missed anything? From a visual inspection they look fine

[erichelgeson]

A normal debug log would show a selection of the HDD and a unit test ready command, then a bunch of reads and writes. You're sure nothing else is on the bus at all, just the bluescsi.

[theshinyknight]

Thanks; then something is at play here because all I get is what you see on the log I attached. There is no activity beside that last couple of lines repeated multiple times, which I assume is the "keep alive" signal from the SCSI bus?

As far as other devices, nothing is connected to it beside the BlueSCSI device. The only other device I have is the keyboard adapter from ADB bus; but it is not on the SCSI chain. I also tried to add and remove the jumper for termination, and that didn't make much difference either.

At this point I am reflowing the pins on hot plate to see if that fix the issue; based on your troubleshooting which pins should I follow from the pico to the board to see if the signal is correct?

[erichelgeson]

The bus reset is the mac just resetting the bus - so it's seeing that which is a good thing.

The full schematics are in this repo if you want to trace a line.

Is this a 50pin version? Do you have the initiator/target jumper installed? https://github.com/BlueSCSI/BlueSCSI-v2/wiki/Board-Jumpers-&-Config#initiatortarget (should be on target)

[theshinyknight]

Thanks, got the problem solved. It was a cold joint on one of the pins of the SMD chip (the square one, not sure what is its name.

After reflowing it, the disk started to read without problems. Tracked this down using the schematics, thanks again!