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The Micron uses an ASIC ("Maveric") which is in unobtanium. The Formac uses (vintage) standard parts. Easy decision IMHO...

Just to add my 2 cents here: After I've disassembled and completely commented the original DeclROM we have 2 different approaches: Patch the hell out of it Rewrite our own While patching the binary gives you immediate results (good and bad ones) it's tedious, error prune and gives you just...

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Mhh, never saw that dialog at JLC.... and I ordered many, many multi-layer boards. While you're living in het mooie Nederland, I can offer you to sell/send you a purple, unpopulated board as soon mine arrived (if you're fine doing the populating yourself).

The order of the layers is automatically defined by the gerber files - so it seems that something went wrong during your order process (create a zip file from the "board files" folder and upload that). But as long as the top- and bottom-layers are on the outside, everything else belongs into the...

Oh dang, you're right... need to resume that. I dived way too deep into the Apple IIgs universe. So I need to populate my (rev.1) soon to have an "in vivo" test-bench instead those dreaded 'try now' sessions ;) Also I noticed that the orientation of the diodes D4-D19 is wrong in the provided...

...and I've disassembled (and partly commented) it over here: https://github.com/axelmuhr/Carrera040/blob/master/se30vrom.asm

Like! :wub:

Hey gang, After many moons of waiting on my todo-stack, I finally repaired my Radius Rocket. Runs fine and all... ..but there's one strange thing I came about when doing nastier things than running MacBench: It claims not having an MMU (while the installed 68040/25 certainly has one) -...

Hi - Just to throw in my 2 Euro cents here: All I've read in this thread is RPM, decibel and CFM... but you're totally missing one important number: Static pressure (Measured in 'mm/H2O' or sometimes in 'Pa') Especially systems been cooled by sucking air through the whole box having obstacles...

Awesome, "Dicker"! :-D

LOL - love you too, bro!  ...and QuickDraw just uses, whatever method the driver offers to set pixels. So what the heck, I've disassembled the SE/30 driver-ROM, too. See the disassembly here https://github.com/axelmuhr/Carrera040/blob/master/se30vrom.asm - the most of it is sRecords and the...

Do you mean the filters M/C 8908L 115-0002 (yellow DIPs)....  these seem to be compatible with https://www.bourns.com/pdfs/601.pdf, still hard to find, and no idea how the check the internal R-C-R network of each pin-pair... The floppy cables are "red-stripes".

Hey Gang, so here's a IMHO tough nut to crack... Just got two SE 1/20. Cleaned them etc. and both boot fine off their screaming original 20MB HDDs. What puzzles me is that both(!) refrain to accept every floppy-disk being fed to them... either instantly ejecting or offering to format them...

Sorry for my ignorance... I'm (still) so deep in that damn challenging SE/30 vs. Carrera040 thing that I hardly look left and right  :blink: Yes, the power-button works like it does with the original PSU - but I can't guarantee that for the 'locked state' as I don't have a key for the lock...

1st of all when you do a PS replacement, the new one is probably much smaller than the original, so there aren't so many obstacles in the PS case anymore. Plus a more recent PS emits less heat. 2nd, the fan sucks the air from the case and blows it through the PS to the outside (instead of...

I'd say that's the root of all issues.... given there's not just a mildly warm 68030 (not mentioning accelerators), a hard-drive, power-supply and most important -and usually very uncommon- a CRT in this small case, static pressure is the main point when it comes down to cooling. On top of this...

I don't see any necrotic thing going on. This thread is here to stay ;-) Anyhoo, that Noctuas NF-F12 is one hell of a fan and definitely a good fit for the job... I was just too cheap to spend 20€ on a fan (and had that spare BeQuiet in my drawer), "also hau rein das Ding!" As for the...

Discussed this clocking "suspicion" with Bolle already (We're quite busy behind the scenes ;-)). I traced the CPUclk (SE/30: 15.6672MHz) coming from the PDS slot to both FPGAs 'TclkIn' pins. Also, the 040s 33.3Mhz clock is fed in there. So my initial (stupid) WAG was, that these two...

Another quick update: It's getting clearer every day that little SE/30 and Lady Carrera have an hardware "issue" within their relationship (current status: It's complicated)... Because the INIT code gets quite far (beyond the 68040 init routine) every 10th-15th try it simply can't be just the...