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Ok, Since I kinda answered most of my questions with chipping, I figured I'd ask a specific question and actually put it in the correct forum I'm planning on getting a PDS riser for my IIsi with an empty FPU socket. Which specific P/N do I need? According to this database, there are several revisions and masks— now, I'm a noob and I haven't look up what a processor's "mask" would be, I just have enough presence of mind to ask those who do know. The Apple NuBus riser card has a MC68882FN20A FPU with a mask of 1C12R. So does the Daystar PDS riser. Can't find a googlesearch image of the Supermac one with an FPU housed. These packages with numbers matching are presumably still available from Herb's Mac Stuff site. (I haven't asked him about those, specifically) On ebay are several MC68882FN20A FPUs but the mask differs: 2C12R but are half the price of what Herb is asking. Will this newer (presumably) FPU not work with the setup I'm looking for? (IIsi riser) Do I need to pony up for the original product.? Thanks
IIfx posted a topic in Mac II, Quadra & CentrisThought I would do a write up on my absolutely loaded Macintosh IIfx, now that the build is largely complete. Last night I got around to recapping the board, removing SMD electrolytic caps that were starting to leak. I also replaced most of the radials, leaving the yellow ones in as I had no equivalent on hand. Specifications: 80mb Host System RAM, 16mb in Bank A, 64mb in Bank B 64mb Rocket StageII RAM 40mhz 68030 & 68882 FPU + 40mhz 68040 on Radius Rocket StageII Radius/Apple 24AC Quickdraw Accelerated Video Radius PhotoEngine DSP Card Apple Ethernet NB, 10mhz 68000 on card SuperMac VideoSpigot AudioMedia II sound card with Motorola DSP Radius Rocket StageII with SCSI-2 PDS Booster 2gb IBM SCSI HDD 1 1.44mb SuperDrive BMOW Mac Rominator II MEGA 8mb ROM SIMM Radius Precisioncolor/17 CRT display System 7.1.1 Pro Manufactured 3-4-1992 in Freemont, CA This machine is a blazing fast 68k, no other way to put it. The special accelerated architecture makes mundane tasks like writing floppies a breeze where other 68ks would slow down and choke. It was owned by an aerospace engineer and investor/businessman. I am the second owner, so the machine has been well cared for. No idea how much this all would have cost back in 1992, no doubt it earns the name of "freaking expensive". Why did I name it the IIfx 40/DP AV? It has dual processors, albeit differing generations. Both CPU's run at 40mhz. The AV portion comes from the Spigot and the Audiomedia II card. Recap Process: OEM-like Nichicon caps were selected for the recap. Interestingly the IIfx logic board has pads underneath the axials for a very large surface mount can cap. So every cap pad in the IIfx is duplicated! The overall logic board post-repair: The system was stability tested by processing high resolution 1200dpi scans in TIFF format, simultaneously on the Rocket and the host machine. No crashes! Loadout: For per-slot card photos, see the following imgur album: https://imgur.com/a/BrHX8 More to come soon. Screenshots, overall case photos, etc.