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Bolle

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Everything posted by Bolle

  1. Bolle

    SE/30 Logic Board Resurrection

    The numbers next to the ends of the traces show on which page of the schematics those signals appear again. Lets take the chip select signal of the SCSI chip for instance: /CS is on pin 17 of the IC. Apple calls this signal /SCSI. Now if you open page 3 of the schematics you will see the /SCSI signal again. This time it is referring to page 6. You will find it right below the middle of the page on the left. It is going to the GLUE at pin 24. If there is more than one number next to a signal at the edge of a page it will appear on all the pages that are called.
  2. I have a lot of CPU cards... guess I should dump all the flash chips sometime soon. I think there were XServes with 1GHz single CPU and 2MB cache. Those probably did run at 1:4 as well though.
  3. They are connected. You can even see that in your picture. You ripped a part of the trace that was connected to the pad. You can repair that with a tiny piece of wire to form a new pad. You can solder the wire to the via that is right next to where the trace ripped.
  4. Bolle

    Picked up a Mac IIci with some accessories!

    That cache card looks interesting. Can you get a picture of that one as well? Certainly not your standard Apple cache card.
  5. The Minipro TL866 can read them. Not sure anymore of what kind of chip they were but I think they were marked with manufacturer/model. Not sure if there is a software way to read them... probably not.
  6. There is no way to set those in OF at boot time other than changing the values in the flash chip on the CPU module. OF reads the configuration from there and applies the settings to the registers accordingly. I have seen some documentation on what is stored on those chips in some Motorola documents somewhere... Pretty sure Apple just used the standard Motorola design there so you might be able to find out about the underlying structure of what's inside the flash. Two examples I dumped before: 1Ghz Single 7455A 1MBL3 MDD: FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF C9300801 3030392D 36343535 01169B41 8410C0BC 8410CCBC 00000000 01120611 00000000 01140641 05780500 ED7E08C4 00000000 00000000 00000000 00000000 FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF 1.42GHz Dual 7455B 2MBL3 MDD: FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF C9300801 3030392D 36343131 02169B41 8410C0BC 8410CCBC 00000000 01120611 00000000 01150661 05780200 ED3308DB 00000000 00000000 00000000 00000000 FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF It apparently has an Apple part number in it that differs between both (first line that is not FFFFFs...) The rest has to hold information about the module itself, cache speed, etc...
  7. Bolle

    Two SE 1/20 do not accept floppies

    edit: -got confused-
  8. Bolle

    Two SE 1/20 do not accept floppies

    Apple did not always install filters with R-C-R networks. Some boards have simple resistor packs instead of the filter networks. Start by checking the series resistance of each pin pair. If you desolder the filter you can also measure the capacitance for each pin. The actual value will be off though because the resistors. You could do some maths to calculate the actual value if your multimeter comes with a proper datasheet. I usually only check if no capacitor is shorted out and if the capacitance is in the same range for all of them.
  9. Bolle

    Major Setback!

    Is the board booting fine otherwise and you just get a corrupted image on screen? In that case I would take a look at the VRAM address muxes (UA8-UD8) and video line and column counters (UF8 and UG8) first. Also have all traces going to them checked for continuity.
  10. Bolle

    Two SE 1/20 do not accept floppies

    Check if the resistor network next to the floppy port is ok on your boards. Also make sure you have the correct cable for 1.4MB drives. Not sure if this is a thing on the SE but there were Macs that needed the one with the yellow stripe for 800k drives and the one with the red stripe for 1.4MB drives. The drives would not work if used with the wrong cable. Those ROMs are FDHD and the floppy controller in that picture is a SWIM as well.
  11. Bolle

    New case of Simasimac -- at my wit's end!

    If you have corrosion on the ROM SIMM there might be corrosion on the socket as well. UE8 is usually fine if you get horizontal stripes on screen because that is the default content of the VRAM.
  12. The RTC also stores the PRAM. Some Macs will not work properly without it. You should reach the floppy icon/question mark but it might not boot from SCSI without the RTC chip.
  13. Traces around there do look good, but a lot of those vias where all the solder has been eaten away do not. Grab the schematics and check all traces in the startup circuit. Even if they look good they might have failed in places you can’t see. Those 74s logic chips could be bad as well but I would start with checking traces first.
  14. Bolle

    Se30 - help identifying an expansion board

    There are cards that don't show up if there is no monitor connected. That behaviour is particularly useful in the SE/30 so the main screen won't set itself to a ghost display. My Radius IIsi Pivot does it as well as the SE/30 B/W Pivot.
  15. Bolle

    SE/30 can't recognize SCSI HDD

    Depending on how bad the caps leaked I'd say broken traces around the SCSI controller. Happens all the time and is easy to spot and fix. Grab the schematics and check all traces between the SCSI chip and the internal SCSI connector. Also check all the other signals that go from the SCSI chip to somewhere else on the board.
  16. Bolle

    Bolles finds

    Figured it might be time for one like these for me as well. The start is going to be made by a SE I just picked up from the post office: It was advertised as an SE/30 by the seller and the pictures in the auction showed it indeed had a SE/30 sticker on the back. Also notice the network card - the reason for me to get this one in the first place: This one either had to be a homemade SE->SE/30 upgrade or someone just swapped around parts between machines back when it was still in use. With the price being low I did not even bother to ask the seller to investigate this further and take more pictures and just had him send it to me right away. Turns out it is a regular SE with 800K drive, IWM and old ROMs and a 20MB Miniscribe drive. Logicboard is dated 1986 and has a soldered battery, so one of the earlier boards. The internal chassis also is the old original SE chassis without the cutout for vertical PDS cards like found on later SEs and SE/30. Did not have one of those yet. To my surprise the Miniscribe works just fine after rocking the interrupter to overcome stiction. The SE booted right up and the drive checks out without any bad blocks. Never seen a working Miniscribe in person yet - awesome noises it makes. As the pictures of the back of the machine indicated it had indeed a network card inside: This is an Asante MacCon + SEE. You do not seem to see these (or any other SE NICs) very often. The SE seems to have been used as a Router. There was Apple Internet Router installed together with Apple Share and MacTCP. Even though After Dark is installed as well the screen has some pretty bad burn in. This SE has done some work back in it the as it seems. Even more it is surprising to me that the Miniscribe is still working today - just imagine the hours and hours it must have been running. Now if there would be a way to use the network card together with one of my 030 Accelerators for the SE. Passthrough hack time anyone?
  17. Bolle

    Carrera040 Info / Hacking Thread

    I'll just leave this here... Can you spot what's going on?
  18. Bolle

    Daystar Universal PowerCache P33 in SE/30

    Success... suddenly my board wouldn't boot at all anymore. It was having issues before but was good then again. Looks like the CPU died. Removed it and tested it in another board and it is dead as a doornail. However upon removing it the full stack of PDS cards started to work with the Turbo040: The T040 even works with the MacCon stuck under it. I could never get this to work reliably up to now. If I knew it would have been as simple as inverting that one clock signal. It is running rock solid for an hour now. Downside is that the P33 won't work with the clock inverted but I might be able to solve that and go completely jumperless on the adapter. Another mystery solved.
  19. Bolle

    Daystar Universal PowerCache P33 in SE/30

    GAL-less adapter here we go... Made a prototype out of one of my existing adapters: This will run the P33 just fine in the SE/30 with all dual PDS card (MacCon always in the bottom) combinations I could test so far: -Radius IIsi Pivot -Radius SE/30 Pivot (not color Pivot) -Shiva Ethernet card (dual ethernet SE/30 anyone?) -Formac ProNitron80 -Micron Xceed Color30 Nearly all signals are connected straight through. Only the 16MHz clock gets buffered by the 74ACT86. This is needed for some PDS cards, otherwise the logicboard video signal will drop out because the clock line gets too much load from all the cards and the video logic will fail to pick up the low signal. The Turbo040 still won't work as well as the P33. I noticed that the GAL-based T040 I got from @Udo.Keller is even worse than my later ASIC revision. Different firmware versions on the T040 do not seem to change anything either. Looks like it helps a bit with timing when inverting the 16MHz signal that goes to the accelerator slot. That way the T040 will work but the P33 won't. Easy to fix that though with a jumper switching between VCC and GND on the ACT86 to invert the clock or not. The PSU in my barebones testbed SE/30 is getting weak, I'll have to get another one for further testing with the 040 and multiple PDS cards. Good news for PowerCache users, still somewhat bad news for T040 users. I have heard a few reports of the GAL version performing really bad in the SE/30 (or even other machines it's supposed to work in just fine)
  20. Bolle

    Bolles finds

    The schematics are available on the net and I also got the original magazines here. Got the GAL listings from someone on a1k but the basic ones are also printed in the magazines. Not sure if it's worth it though to replicate it. I have been working on replicating the newer PAK68/3 but I am not yet sure on what features I should implement right into the design. There was a bus buffer board (PuPla) and a RAM extension (FRAK) for the PAK3 as well and it would be nice to have them all in one board. The RAM board was not supposed to work in the Mac though so that might need some messing with the GAL code to get it to work. Also not sure if the buffer extension works on the Mac or if it is needed at all. There are not a lot reports on using any of the PAK cards in the Mac. Most stuff you find is on using it in the Atari as it seems.
  21. Bolle

    My screen is blue (Radius Pivot SE/30)

    Here we go... Put together an adapter from jumper wires - the pinout above is correct. Pin 1 is closest to the top of the card (opposite of the PDS connector) It's putting out 1152*864 and I am getting 2bit grayscale with the 256K VRAM on there right now. Picture is smashed because of the pivot resolution. Played around with different settings on my VGA adapter but it always outputs the same resolution. In fact if I set it to do 640*480 it will only display the Radius logo but won't show up in the monitors CP. Also the card won't show up correctly in SlotInfo/Tattletech if there is no screen connected (or some weird sense line setup the card won't understand as it seems) So they do sense if a screen is connected and disable the card so you don't get an external ghost display. JP4 and JP5 will let you choose between slot IDs A and B. You have to move both jumpers at the same time and into the same position. Couldn't figure out yet what JP1-JP3 do. If I change any of them things break. I get either a distorted screen or no screen at all. Now to see if I have the correct type VRAM around to fill those two empty slots...
  22. Bolle

    My screen is blue (Radius Pivot SE/30)

    Not sure if that has been done yet... I just got the old style SE/30 Pivot card from @tokyoracer (minus the cable) Looking at my IIsi Pivot and the signals on the SE/30 card it should have the following pinout: 1 gnd 2 red 3 csync? 4 sense0 5 green 6 gnd 7 sense1 8 blue 9 gnd 10 69hz vsync 11 gnd 12 64khz hsync Not sure on the csync... that signal goes to the SYNC pin on the RAMDAC, so it's possibly correct. The frequencies on 10 and 12 have been measured without a anything connected to the card, so it seems like it is always outputting something (well, sync signals at least) The harness for that card in the picture @BadGoldEagle posted only connects the blue signal, hence that fancy trick bridging that signal to the other color pins works. Green and red signals are routed from the connector to the RAMDAC as well. Going to wire up an adapter quickly and see what happens...
  23. But the much thinner cap leads itself will be as well by then. I had caps fall off while gently brushing the board using an old soft toothbrush to get the major gunk off before starting with removing any caps. The leads were completely corroded away and the cap was only sticking to a little dab of glue they put underneath on some boards. It may look bad when you see someone twisting caps off but once you feel how little force is actually needed until the leads snap I have no worries that this could do any damage to a pad ever. Any straight upwards force should be avoided. Even when desoldering a kind of a sideways twisting or jiggling motion to see wether the solder did melt or not is better than pulling up on the component. There is no "right" way in the end I'd say. If you can try as much of the known methods to get a feel for it and just do what gets the job done for you.
  24. Carefully twisting the caps off the board works just fine if done right. I have done countless boards that way - not a single pad ripped. Ever. I am with @AwkwardPotato here, excessive heat will put a lot more stress on the pad as will wiggling the cap back and forth while heating just one side. For a beginner it is the way to go in my experience as you can do wrong a lot more swinging around a soldering iron or hot air gun trying not to burn your fingers or anything else while keeping calm and go slow about removing the cap. Not going to work if you haven't done any soldering before. Been there, done that, ripped a lot of pads already doing it "by the book" The twist method is fool proof though. The key is to push down on the cap while gently twisting and not pull up on it. As long as there is no upwards force you won't be able to get enough torque into the pad to actually rip it off. Just see how thin and tiny the lead it that actually goes into the cap. This is where you want things to break - and it will break there. You are not supposed to actually rip through the solder at the pad which is of course not going to work.
  25. Bolle

    Bolles finds

    Cards, cards, cards... That would be a Daystar cache card for the Quadra PDS. It came with a PDS adapter for the Quadra/Centris 610. Then we have two Formac video cards from the late80s/early 90s: a ProNitron 80 and a Prisma2. Both nothing special. The ProNitron has a fixed 1024*768 output at 256 colors. The Prisma2 does not show up in TattleTech or SlotInfo. I dumped the ROM and it looks totally different from any other Formac ROM I have seen so far - it might be broken. The card in the upper right corner is pretty interesting. It took me a while to figure out what it even is. It says "TransMac Board V2" and is made by Hermstedt GmbH. They were popular for their "Leonardo" line of ISDN Nubus/PCI cards. The card right here shows up as "BAM Communication Board" in TattleTech. After digging around in old magazine articles I found out that the card together with a piece of software (supposed to be called "Macsteam") can be used to connect to Transdata networks simulating a Fujitsu/Siemens DSS9750 terminal. It was supposed to be able to connect to up to 4 different BS2000 mainframes at the same time. Pretty useless nowadays but interesting nevertheless.
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