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About trag

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  • Location
    Austin, TX
  • Interests
    Model & Amateur Rocketry

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  1. I think all of these preservation projects are valuable, unless there's thousands of these available out there. The attached datasheet might help make a good start at this. There's a block diagram and a transistor level schematic, although the characteristics of the transistors are not specified. TDA1170.pdf
  2. I think that's right, but I'm not certain. I don't remember there being an incompatibility... This is where I wish the old resources at xlr8yourmac.com were still up. He had a great user contributed compatibility database. And some of the best, most technical discussion in the long gone forums.... Some of the old articles are still there, so you might look for anything with G4 CPU in Beige G3.
  3. @MrFahrenheit You're probably already aware, but the bus speed and CPU speed multiplier (X bus speed gives CPU speed) are controlled by the jumper bank on the logic board. If the board was originally a 233, then it's probably set to a 66MHz bus speed with a 3.5X multiplier. For initial testing, I would leave the jumper block at the original settings (assuming it is still in original configuration). That will give you functional testing of ZIFs at conditions that are not challenging. None were shipped rated for less than 233 MHz speed. Then you can alter the jumpe
  4. I believed you when you said they were re-marking them. I just don't understand the why or what of it. I could see marking random QFP packages with 68030 markings, but then they wouldn't work. It sounds like it doesn't make a lot of sense to you either. Perhaps they have some kind of bulk process where the desolder the pins and wash the chips and that removes the markings? Then they must remark them? Strange and puzzling.
  5. If they're fake and they work fine once installed, what does that mean? They're not really 33MHz parts? Surely someone isn't fabricating pirate 68030 CPUs?
  6. @LaPortaHave you cleaned and replaced the heat sink grease on the PPC601 CPU? I've seen similar issues on 7100s. The heat sink grease had turned to chalk. Had me scratching my head, reading to start pulling out chunks of hair, until, once, I noticed video artifacts before freeze up. The artifacts reminded me of an overheating symptom. Replaced the heat sink grease and it was perfect after that.
  7. Do you know what firmware is on the card? The 2.2.4 version will give you OSX compatibility without hindering your Classic compatibility. I don't remember for certain, but I don't think the Ultra/66 ever added large drive support beyond 128 GB. It's not really worth the effort now days, but the card is based off the hardware of the Promise UltraTek/66 and the conversion is not too difficult, although one of the resistors that needs to be moved is under the Flash chip, so the Flash chip must be desoldered in order to perform the modification. I can't remember if it al
  8. That is surprising. I think software didn't churn as much in the past as it does now.
  9. I surprised that FWB doesn't have an option for "removable disk". I thought they did, but maybe I'm confusing them with something else. I think APS, APT, ? Alliance Power Tools or something like that has such an option, but I can't swear to it. If I remember I'll look through my archive of formatting software.
  10. I posted an image of the CDROM that came with the external SCSI 640MB DynaMO drive here: https://www.prismnet.com/~trag/Mac_Drivers/ The disk is imaged using Apple Disk Copy 6.3.3. I think Anarchie must have added the .bin. So it looks like you might need software to de-binhex it and then Disk Copy to mount the image. When it's all uncompressed, it's only about 50MB.
  11. I'm not sure which are CUDAs and which are Egrets. I just wanted to mention that I've replaced an 0788 with an 0060, or maybe the other direction and it seemed to work fine.
  12. It's the FAT AMIC on the PowerMac 9150. It's one of the primary parts of the chip set. A 208 pin QFP. The thing is, it's the essential component that allows 5 NuBus slots on a NuBus Mac. All the 3-slot NuBus PowerMacs use the plain AMIC. If I had a source of FAT AMICs (without killing 9150s) I might try to create the I/O board for the Power Computing Power 120 which enables 5 slots. As shipped it supported three slots, but had headers for five slots.
  13. I'll need to remember to check when I'm at home. I don't actively use my MO drives these days. For me they're more in the nice-to-have category, but they're packed in the attic these days. But the disks and probably a copy on my archive drive are in the study somewhere.
  14. Sadly, they don't have the FAT AMIC. 343S0148
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