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trag

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Everything posted by trag

  1. Unless it was some bizarre early model, it does not need a ROM DIMM. The ROMs are soldered down, and the socket is there for later potential upgrades/updates/revisions. On the 8500 the ROM chips are on the back of the board. They are four .5" X 1.1" 44 pin chips with 22 pins down each long side. Should be labeled 341S0168 through 341S0171, IIRC. Could be 0169 through 0172. Might be 343 instead of 341. Memory is rusty. Most likely what you removed was an L2 cache DIMM, although, as I mentioned above, it's possible yours had a ROM DIMM. I don't think I've ever heard of an 8500 without soldered down ROMs though.
  2. I had time this weekend to experiment with my old miniVMac installation. I have the full version of Dungeon of Doom, but it says it is version 2.0 in the about screen. I didn't know versions got up to 5.4. Anyway, the specific problem is that no keyboard inputs work at all. Things like cmd-d for drop of cmd-g for get have zero effect. I end up having to do everything with the mouse and the menus. I never experimented much with minivmac so I am a totally unsophisticated user. It's entirely possible I'm doing something wrong, or have a out of date version of minivmac or something. At the time I did post to some forums asking about the issue I experienced, and no one ever responded. Anyway, point being, it would be great if the keyboard commands work on your emulator. Maybe that's not a major issue. Maybe my problems are a user issue. I'd be happy to send you my disk image of Dungeon of Doom.
  3. Well, keep in mind that's a really old memory and I only read about NetDoubler, didn't use it. So do not be surprised if I'm wrong. I would hope there'd be a ReadMe file or something in the user instructions that would tell you.
  4. IIRC, Net Doubler only works between two machines which are each running it (and have installed compatible Asante hardware?). I always assumed it was some kind of compression before transmission software, but that's probably wrong. Hardware of the time probably wasn't able to compress on the fly that well.
  5. Wow, Toni_, thank you. Talk about responsive. I'll try to figure out exactly what problem I was having. The trick is remembering to do it after I get home, where older Mac is. The problem was pretty specific and darned annoying.
  6. I didn't notice this thread almost a year ago when you were asking for game suggestions. Very cool concept and execution, BTW. If it's not too late, I would like to suggest the old game, "Dungeon of Doom". I'm not sure about the providence at this point. I bring it up, because when running it under miniVMac it has a problem with, IIRC, a keyboard function. I want to say for dropping items, but it's been a long time ago. When it didn't work right, I stopped trying to play it. Anyway, I'd love to see an emulator that works better. I can post/email a copy if you can't find it otherwise, if you are interested.
  7. trag

    Macintosh Classic II with missing ROMs

    The DIP (chips with pins downward on two sides) chips are getting a little thin on the ground. I'm not sure what vertical clearance the Classic II has, but these would allow you to use the equivalent PLCC32 chips: https://www.ebay.com/itm/Plcc32-to-dip32-programmer-adapter-ic-socket-converter-module-fq/153711824747?hash=item23c9f04f6b:g:QhUAAOSwXOhb1rHB
  8. You're welcome. Good luck and let us know how it goes. Those of us too lazy or too busy to work on projects enjoy reading the narratives of those of you who do work on projects...
  9. trag

    Another Mac SE/30 SCSI Problem

    Excellent work. Way to track down the problem.
  10. trag

    Asanté MacCon SE/30 clone

    That's right. Memory is creaking back to life. I think I picked those up when I was hoping to find some SMS[mumble]1000 or some such. A common 10/100 ethernet combo at the time. I used to do a lot of watching on Ebay for cheap lots, and when one came along, it was usually best to grab it, even if you still needed another component. Either I don't have same energy for watching, or there are not as many chip bargains as there once were. Used to be huge lots of flash chips at very low prices...
  11. trag

    Major Score! 8600 with Sonnet CPU, 3DFX card, Etc

    I think a lot of those Yamaha burners died. They had nice features for the time, but they only seemed to last three to five years, generally.
  12. There's a Larry Pina book that covers the IWII, and since those have all (AFAIK) been posted on line, you might search for it. It's probably something like Macintosh Printer Secrets or some such. Also, Tech Knight did a really good IWII repair/refurbishment thread on these forums a while back.
  13. trag

    Asanté MacCon SE/30 clone

    What is the transceiver chip? Is it either of the following, DP83840 or DP83223? I have about 50 of the former and over 150 of the latter... Beautiful work. I spent a while admiring the labeling and options on the board. It looks like you put a lot of thought into the details.
  14. trag

    Major Score! 8600 with Sonnet CPU, 3DFX card, Etc

    I've always had pretty good experience with Toast Titanium 5.1, which I think is the last version to support Classic Mac OS. Another option for optical drives these days is to get one of these: https://www.amazon.com/dp/B001B7XYZO/ref=cm_sw_em_r_mt_dp_U_T1DmEbW6HR47X which is a slot loading PATA DVDRW drive. The supply of 5.25" half height drives seems to have dried up, but these are still available. Unfortunately, the slim optical drives use their own connector, so one also needs a PATA slimline optical drive to 40 pin adapter. And some way to mount it. I like these, but their price bounces around https://www.amazon.com/dp/B007C1KPQY/ref=cm_sw_em_r_mt_dp_U_23DmEbRJA2GEV I use this mount for slot loading optical drives, but it also, supposedly, has room for four 2.5" drives. I shudder when I try to imagine the cabling if one fully packed it.
  15. The problem could be caused by many things. Another one that I've seen in my experience, at least on teh PPC601, was that getting heat sink grease on the pins caused an issue with the FPU. I don't really understand how the short that might cause could affect just the FPU, but it did. For the PPC601, the pins are around the outer edge of the chip, so that's where the heat sink grease ends up if one applies too much. On a PPC604e, I think it would take a little work to get excess grease under the chip and amongst the BGA balls. Probably not the problem in your case, but you know what, the heat sink grease could be worn out and the chip overheating. As long as you're gentle, it can't hurt to pull the heat sink, clean the old grease and apply new. And do a quick inspection to see if any has spilled over the edges of the chip.
  16. trag

    SE/30 PDS Adapter Epic Blunder

    32K X 32 is 128K of cache.... It's all on one chip, instead of spread over four. However, buying 32K X 8 chips that match the JEDEC standard of the original chips avoids any re-engineering. Tag-SRAM is an SRAM with comparators on board. It shouldn't be too difficult to create a replacement if you run out of existing parts. The challenge is making the new arrangement fast enough.
  17. trag

    SE/30 PDS Adapter Epic Blunder

    That is fantastic news! How many chjps in a tray? Guacamole. So how long until you guys are producing new ones? I have 800 IS61C632 (32K X 32 SRAM) that could be used for cache, if that helps...
  18. trag

    SE/30 PDS Adapter Epic Blunder

    Yes, that was my thought, but again, I think the pins look too clean for that to be the case. Another possibility is that these are ones that failed the post manufacturing test (did they have automated test and scan testing with JTAG back then?) and were binned as failures, and again, somehow found their way into a sales channel. A happier possibility is that these were manufacturing rejects, because their pins somehow got bent. So they are perfectly good chips, but couldn't be used in a pick and place manufacturing situation because of the bent pins. Or they could just be left overs that never got used which suffered some pin damage over the years; e.g. someone spilled the tray onto a hard floor. Leftovers do find their way back into the sales channel. AMD made the 79C950 (CURIO) for Apple, which is the chip used from the Q840AV through the PPC PowerMacs (x500 family) to provide internal/external SCSI, Serial, and ethernet. It was a custom job for Apple. Yet trays of those unused chips showed up on Ebay about ten years ago or so. I suspect that those leftovers were from one of the clone makers rather than Apple itself. Apple seems to do a "good" job of keeping its leftover chips off the aftermarket.
  19. Limitations for assembly is always a good reason. I designed some SIMMs with four chips on each side, even though there was room for all eight on one side, because four & four left room between them for a soldering pencil...
  20. Any chance of a link to the other thread? I looked through this one, but didn't see one. Never mind, found it in my "New Content" page:
  21. PowerWave should work fine with any 225/45 card that will fit in the slot. The PowerWave is essentially a (take your pick): 1) 7500/8500 with the video circuitry removed. 2) 9500 with the second PCI bus removed. It might not (or might) work with a 210/60 or 240/60 card. I've had the PowerTower Pro and Umax S900 up to 62MHz bus speed, provided the CPU card properly sets the CLKID pins on the CPU card. I think I covered the 8500/8600 stuff in another thread when you were getting the PW working, but in brief: Three revisions: PowerMac 8500/9500, 8600/9600. 8600 Enhanced/9600 Enhanced. The "enhanced" models are the ones with the "Kansas" motherboard and the "Mach V" CPU card which uses the PPC604ev chip. Apple's CPU cards 250MHz or faster were PPC604EV, Mach V, cards which only work in the two late, enhanced models. Some third party brands sold 250 MHz PPC604e cards which will work in all the non-enhanced models, both Apple and clone. All of the non-Mach V Apple cards, PCC cards and Umax CPU cards should work in the PowerWave and PowerTower Pro. Except for the PowerTower Pro and PowerWave, Apple CPU cards will not work in the Power Computing clones. Also, PCC cards made for the PTP and the PW may not work in the other PCC clones. The other PCC clones are based off of the Catalyst chip set and need a couple of CPU signals which aren't brought out to card pins in the Apple cards (and the PTP/PW cards?). But, that doesn't matter, because you're testing a PowerWave. That 225/45 card should work, if it is functional. If it is a Umax card, then there are three (four?) jumpers that need to be installed at the top, because Umax had this weird double-processor scheme with a ribbon cable between the CPU cards and when the CPUs were used singly, some of the cable pins needed to be shorted with jumpers. Hopefully you're testing with no cache installed. Those can cause issues. On the other hand, I've read of cases where things didn't work well until a cache was installed. I guess the extra load reduced ringing on the bus or something. Finally, what it really sounds like is that your power supply is marginal and when the load gets above a certain point everything goes flakey. Do you have another ATX power supply on hand you could try? I've also seen the PCI bus on a PowerTower Pro fail because the solder joints on the PCI arbiter chip went bad. PCI arbiter is a little square PLCC chip, with 20 or 25 pins. I don't remember the markings at the moment. Oh, and, having an older 132 card work and a newer 225 card not work, I have seen when there were problems with the 3.3V supply on the logic board.... Just remembered that one from about 15 years ago. You might take a voltmeter to the 3.3V supply, although if it's something like worn out bypass caps a voltmeter might not tell the story. In my case, one of the chips had developed an internal short that was loading 3.3V to one of the other rails, or ground, can't remember which. It wasn't enough to shut down the PS, but it made anything that wanted 3.3V not work. But it could just be that the old PCC power supply isn't supplying good 3.3V, in which case a repalcement ATX PS will solve that.
  22. As long as you're going surface mount, why not switch to a single inverter package? Five pins I think although one is unused. It would be even smaller and might cost a bit less.
  23. trag

    SE/30 PDS Adapter Epic Blunder

    You know, it's possible that those chips have bent pins because they were pulled off of failed Turbo 040s when Daystar re-worked warranty covered cards. And then somehow the tray of pulled chips made it into the sales channel. There are many other possibilities too, others not so depressing, but it is one thing to consider. Although, if the above was the case, I don't think the pins would look quite so clean.
  24. trag

    SE/30 PDS Adapter Epic Blunder

    Doing a quick Google Image search, there are indeed Daystar Turbo040 cards with the "Daystar" labeled ASIC. And all the ones I looked at had the 1994 date code. I really hope the supplier can be persuaded not to dispose of them, except to us/you.
  25. trag

    Carrera040 Info / Hacking Thread

    Is this a correct summation of the problem: --------------------------------------------------------------------------- The SE/30 has only an 8 bit data path to the VRAM (D24 - 31). This requires byte-wise writes to the VRAM, instead of using the 680x0's normal 32 bit data path. This uses a feature of the 680x0 chips called Dynamic Bus sizing. The 68030 uses a different control signal scheme to signal/setup Dynamic Bus Sizing than the 68040. In some circumstances, the data for the VRAM which should have been on D24-31 would be on D16 - 23 (which the VRAM can't see) because the 68040 interprets the dynamic bus sizing scheme differently and the GALs/logic on the upgrade card doesn't compensate properly for that particular case. So software which sets Siz0-1 and A0-1 properly to get 8 bits of data out on D24-31 on the 68030 causes the 68040 to output that data on a different set of data lines? --------------------------------------------------------------------------- Cool work. What a wonderful job of investigation. I enjoy the way you just casually build interposers for your probing. I imagine there's much more labor spent on those tasks than your off hand mention would suggest. Seems disappointing to me that the data path to VRAM is only 8 bits wide. Aren't there two VRAM chips? Are they only 4 bits wide each?
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