Recent content by Big Ben

I wasn't, but the resistance is pretty low, around few ohms, I took some time to check against a working Quadra 700. Good to know, Quadra 700 have a very low resistance between the 5V rail and the ground, no need to freak out like I did. I started to continue cleaning up the bombed Quadra 700...

Hello, Let me tell you the terrible tale of the bombed Quadra 700. Do you feel that sensation traveling your spline? Fear! You name it! That’s the feeling I had when I took off the shelf this freshly bought Q700 and I heard something moving… Removing the top revealed what everyone fear the...

You should remove the flyback and the speaker. Never had problems with transformers. I always rinse the board before removing the caps to get rid of most of the gunk and the infamous fish smell, let it dry, then remove all caps, then do a deap clean, then resolder everything, the only classic...

As usual, an amazing and incredible work! Thanks for giving us the opportunity to fix our IIfx. Now there is some hope for my bombed one. 🙏

No, a system dump is a partial or complete copy of the RAM not the whole address space (that would be huge). The ROM maybe cached in the RAM but I have absolutly no knowledge about this.

Thanks! System dumps are a different thing, as far as I know it’s not able to do a ROM dump. I’ll try to find a command compatible with AIX, so we can dump the ROM. Just ordered mine yesterday, but it will took sonme time before I could get the ANS back to life. I’m wondering if there is...

Whoa! Thanks!

Yes the ROM dump is probably the trickiest part. I might be able to build a ROM module if I can find a already designed PCB and the proper EEPROM. Here is what I already find so far: http://sphinxgroup.org/Apple_pinouts/Firmware_Module_Pinout.txt...

Found none so far… but it’s likely that my only solution is to find a dump and make a repro (which is out of my capabilities) . Unless someone has one from a dead ANS.

Thanks for asking! Yes, in the service manual there is no part number for the ROM. :( It seems to be the same as the 9500/9600 format but with 8 chips, unfortunatly the only picture I found was to bad to see anything. (The ROM simm format seems to be the same across every Mac with this kind of...

Hello, I recently acquired an ANS 500 in a pretty rough shape, but with some rust fix and cleaning it should be fine. Unfortunatly, there was no cd drive, hard drive, and RAM/ROM sticks. As far as have seen, the ROM stick seems to be mandatory. Can a kind soul with an AWS 500 confirm this...

I recently read that the IDE-2-SD adapters you find online are actually CF-2-SD adapters repurposed as an IDE replacement. The speed is limited to 25MB/s due to the SDHC protocol used by the FC1307A chipset on the board. Alos SD card do wear fast also when used with intensive writes (i.e...

Ok at first I though it was ok the "waves" on the chip are ok, but, it's dead for sure, it was crushed against the board on the upper right corner, pins are bent like hell. Right bottom corner has a crack in the chip for sure. I hope you will manage to get the CPU swapped! There is so much...

Focus can be tricky to get, aging and the fact we are used to sharper displays make this hard to get right. I did a calibration on my Classic Color, I never had a sharp focus across the whole CRT, I had be between two spot: sharp edges or sharp center. Same as you, I can't recall how good...

IIRC, it is possible, but not sure it's worth it since the drive should work fine externaly and the Mac could work without the inner drive connected.