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  1. androda

    Duo Series

    For internal pictures of Duos
  2. http://myoldmac.net/FAQ/SADerror-portable.htm $0A00 is listed as being an F-Line exception from the 68000. I can't find any other reference for $0A in sad mac codes. https://community.nxp.com/t5/ColdFire-68K-Microcontrollers/Line-1010-Emulator-Unimplemented-A-Line-Opcode/m-p/140164/highlight/true#M2288 The CPU is receiving an instruction that should be executed by an FPU, which the mac portable doesn't have. But that's not the whole problem, because normally a system without FPU patches out the address of the F-Line handler to point at the software FPU. Even without a
  3. There's someone selling an adapter on eBay which converts portable scsi connector to standard 50 pin. But it's kind of expensive just for a pin adapter, about $50. The pin out to convert to standard scsi is available on the forum here. Can make your own cable. Maybe I should make a custom ardscsino/bluescsi pcb just for the mac portable's funny internal bus connector. Not a huge market, but better than using adapters.
  4. Fantastic haul. So much good stuff in there. First and foremost, the pram batteries need to be removed from that Mac tower, the mac II stack, and the portable should have the 9v battery removed. Those are most prone to leaking and causing serious damage. If you want to preserve the Macs, they will need work to replace capacitors. If you have questions about capacitor replacement or whatever, feel free to direct message me.
  5. As a next step to my suggestion about reusing the backlit portable's non-hybrid setup, I spent an hour or two tracing it out and recreating in kicad. This comes from a backlit portable which I just recently replaced capacitors on. Quite happily, it works fine now. Here's a picture from my kicad work. Note that U1M and U5L have totally the wrong symbols and look like resistor packs. I'm pretty new to kicad and couldn't find better symbols for them. Also, I'm totally unsure what the values of these resistor packs are. Looking up their numbers didn't help. Measured one in circu
  6. Cool find of the week: a nice set of Newtons. 130, Apple 2000 (upgraded to 2100), and Newton Technology 2100. Includes one rechargeable battery (not likely to work), the AA battery cage, windows Beta version of the newton connection tools, original box for the 2000, some carrying cases, and some of the original purchase documentation. No serial adapters for the 2x00s, so I'll have to figure that out. Not pictured are the five linear flash storage cards that these came with, one original Apple and the rest are third party. Previous owner totally maxed these out, every PCMCIA slot has a fla
  7. The repo I know of with information on the hybrid is here. Might be the one you're thinking of. https://github.com/ppieczul/macintosh-portable Makes me wonder whether the backlit portable's system could be reverse engineered and used instead. Obviously we lack the schematic on the backlit portable so we can't immediately see what differences there are in the rest of the regulator circuit. Seems like Apple wouldn't have much incentive to rework the whole power distribution system: only that which was necessary to get rid of the hybrid. I'm pretty sure that my friend w
  8. Glad you got it all cleaned up and working.
  9. Yet more testing around shows that with the power adapter plugged in, that power manager A/D line spikes all the way up to 6.2 volts. As far as I know, that should stay below 5, with 7.5 volts across the battery resulting in 5 volts on the A/D line. Makes me wonder whether that over voltage is the cause of the bad power manager behavior, causing something internal to break down or overheat. I'll be doing the 'sit and wait' test again, with only the battery connected (more likely, my power supply set to 6.3 volts on battery terminals). Would be nice to know if that is the cause o
  10. I'm curious, are there different cables to use for SCSI vs ATA drives? My 2300-upgraded 280 uses a SCSI drive. It would be interesting to see the pin connections for the ATA drive, might be able to bodge something together to use cheaper drives in it. And if you have the ATA cable, that means you could use one of the common SD to 2.5 inch IDE adapters that are all over the place. Could also do MSATA to 2.5 ide. It very well could be that you are just having awful luck. Have you taken apart the 2300 to replace capacitors? They are probably leaking after all this tim
  11. The G4 plug is not compatible because it's a smaller diameter. A G3 powerbook adapter would work, I've used them before on my Duo. Note that the common yoyo adapter has two styles, one for iBook G3 and one for iBook G4. The G4 style has a darker grey plug which is smaller diameter, and the G3 one has a lighter, more clear plug which is the larger diameter.
  12. Ouch, that sounds like a rather extreme example of corrosion. Given that you measure basically nothing coming from the power supply, there are several possibilities. It could be that inside the mainboard there's a short to ground; this should cause the power supply to go into current limiting mode (drops the voltage) and often they cut out entirely if a short is detected. This one may be fairly likely given you said the serial port was dangling by a thread - who knows what has been corroded and is now touching ground or power which shouldn't be? Maybe the power supply its
  13. Finished my little program, here are the results in CSV output by signal, with VIAD0-7, PMAck, PMReq, PMInt close together for easy comparison. All signals are included, and these files are over 100 megs. Not the friendliest for LibreOffice, but it does open them eventually. Note that I set my LA to consider 2.5 volts to be a logic high, and I am willing and able to try different threshold voltages. The PMReq/PMAck transitions look OK on the successful boot trace (duh, it boots successfully), and I have no idea what's going on in the boot failure trace. Success trace:
  14. Fortunately getting data from the LA was really easy. Plug into ethernet, go to IP address in browser, hey look there are the files. No complicated or proprietary nastiness to deal with. This logic analyzer data is not really messed with or organized in any sort of manner. I just hooked up the pods to my EPMGR adapter board in order and fired it up. I intend to write a little program to parse out all the bits and organize them into sensible sections, like having all the VIA data lines and PMack/req next to each other to make it easier to look through. In the attache
  15. This morning I got a trace from successful powerup, then let the system sit for awhile and got one from a failed powerup. The output files are larger than I expected, need to figure out how to network my logic analyzer to get them onto my laptop (won't fit onto a floppy). Then I'll make a listing of which pin on the LA maps to which pin on the power manager connector and post it all up here. 'transitional timing mode' is nice for this, only records data when there's new data to record.
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