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Bolle

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  1. Also for bragging rights: No external cache though at that speed, so you're still slower than a 40MHz 040 with 128k external cache. Benchmark speed of the cacheless 50MHz 040 in a SE/30 is in the range of a 50MHz 030 with external cache.
  2. Pre-heat the area with hot air set to around 200°C. Works very well for me and I never have to use additional solder or even flux to get things cleanly off any board.
  3. Nope, those files won't help you there. If the GAL in that open spot is indeed needed I'd say there's not much I can do for you without another one of those which has the needed GAL in place to make a copy. Seeing you've got the power connector on there though makes me wonder if you need a secondary power supply hooked up to get it to work at all. Can you meter out if the VCC pins on the PDS connector are even connected to any components on the accelerator? On the Mercury there are several jumpers to select different power sources... In the SE it would be obvious to
  4. The oscillator is only connected to the FPU. The CPU is hardwired for 16MHz. According to a product catalog from back then which I saw somewhere on archive.org the Mercury never did more than 4MB. While we're at it: Total Systems Mercury.zip Totally not tested and schematics have not been cleaned up for readability. Most parts values missing, you'll have to source those from the pictures. GAL files are however correct and tested.
  5. This is the 16MHz Mercury indeed. It is limited to 4MB of RAM on the accelerator. I happen to have the schematics and GAL codes for both the accelerator itself as well as the RAM extension board. Never got around to actually build any clones of it yet though. Working on another SE 030 accelerator right now that will support 16MB RAM and go up to 50MHz (and has video output as well) I felt like the entry level Mercury wouldn’t be worth the trouble...
  6. Does the card show up at all in TattleTech oder SlotInfo? That's the first thing you should check.
  7. Kind of at least... Altough we are slowly getting into working on a replacement logicboard. We‘re going for a more classic PCB design workflow. We‘ve got all the needed Apple custom and non-standard ICs in Eagle and I should start redrawing the schematics sometime soon. I will cross reference the schematics once more with the scans of what is left of the inner layers after grinding away like crazy at one of my boards. I will implement options for using both modern replacements and original ICs where possible... VRAM comes to mind as well as the video ROM, 29F040s right nex
  8. Are you sure this is just a 4 layer hoard? Pretty sure everything was 6 layer by the time the Classic came out.
  9. I can provide the schematics of the Micromac IIcx adapter if you want. Got one of those as well. Also mind you will need the more uncommon socketed IIcx logicboard unless you are ready to desolder the CPU on your logicboard and put a socket in place.
  10. Most probably, yes. Sourcing the out of production stuff that's on there is painful enough already, so I'll avoid to add the trouble of finding non-fake CPUs on top of that. Not yet, the clock generator for the 040 probably is one of the limiting factors here - the same part is used on the Turbo040 and the Carrera040: I am using a MC88916DW80 which is rated at a maximum of 40/80MHz for the B- and P-clock respectively. The exact same clock generator (although at a lower speed rating) is also found on some Macintosh logicboards. I have seen Turb
  11. They remapped everything in software. You would need Connectix Virtual for those to work with more than 4MB of RAM.
  12. I think this was related to one of the CPUs actually being a 25MHz chip. All my 33MHz and 40MHz parts would work just fine. That one 25MHz chip would work ok at 40MHz without the cache module but would fail once the cache came into the game.
  13. Ugh, images messed up in the post above... only noticed I hadn't attached them on here but linked them to imgur right after the editing window went out. Anyways:
  14. Well, now that we've got cachecards the obvious thing to do was making accelerators to have something to plug all those cache cards into: U7.jed U12_CarreraPROM_1FD8.bin
  15. Hm... some weird PRAM setting that got messed up maybe? I think some unused/undocumented PRAM bits are used to store PPC specific stuff. Booting without the T601 in place might have reset something in there and knocked things back into place.
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