Recent content by evanboonie

I think your AI assistant may have just gotten really lucky. This is awesome that you found the correct byte and checksum information though! The reference for the 7450 series L3 Cache Control Register (L3CR) information can be found in section 2.2.5.5.15 of the MPC7450 RISC Microprocessor...

I've also just finished mapping out all of the PCI pins on the chipset to possibly build out a custom FPC (think console HDMI mods) in the hopes of adding an adapter for low-profile PCI cards to the last two Apple PC Compatibility Cards...

I put it off because I don't really enjoy the work of toning out signals, but I finally finished the "XD Expansion" pinout! I should probably start another thread on these mods... But for now, I at least determined that while the connector only exposes a subset of the ISA connector, the correct...

I made up several BIOS mods containing the original and replacement VBIOS with the Mach64 and 3D Rage Pro Device ID's on each. No combination of VBIOS configurations worked with the 3D Rage Pro installed on the card. Just a black screen when attempting to boot the PC. I was also unable to find a...

My first attempt to get the Rage 3D Pro working on the P166 Apple PC Compatibility Card has failed. I found a PCI version using 40SOJ EDO memory that I thought would be a good transplant candidate. My attempt consisted of the following: De-solder and read the PCI card's BIOS chip Use a hex...

Okay, this actually describes a process for extracting the BIOS from the resource fork and replacing it with a modified version! After talking with some folks at VCFMW this weekend, I think it might even be possible to upgrade these cards with an ATI Rage Pro Turbo! From what I can gather, the...

I am also under the impression that the BIOS is what is restricting IDT and AMD chips from running on these cards. There doesn't seem to be a way to get into the BIOS from the software though. The Apple cards inject the BIOS at startup time from the resource fork (similar to how all but the very...

It was extremely tedious, but it didn't seem to risk much damage to the board itself. I actually got a lot of 4 of these cards missing their heat sinks which I did the same mods to. Only one of the Pentium 166 CPUs survived the process; one of them actually split straight in half! 3 of the 4...

Its time for more PC card shenanigans! This time I've modded the final Apple PCI model card that shipped with a Pentium 166. The first task at hand is a re-cap. The original capacitors on these cards leak like crazy (I've seen 5 so far, all 5 have had very leaky caps; especailly the ones near...

I just performed an L3 cache and CPU swap on my 800Mhz Sonnet card. My 800Mhz came with a 7451 installed on it, so there were at least some of them made that way by Sonnet. I started by swapping on 2MB of 250Mhz cache memory chips from a Quicksilver upgrade. The 2MB of cache showed up...

That card looks exactly like my original OrangePC which does use the OrangePC 3.8.2 software. Post #144 on this thread has a photo of my card, but a lot of it is covered by the sound card in an ISA riser. This card has a Chips 82C836 chipset and gets its BIOS from the OrangePC application; I...

I believe that the card you are describing is the Orange386, which is not compatible with the "OrangePC" software. The only place I have managed to track down the software for it is here: https://vintageapple.org/macdrivers/cards.shtml . I do not own one of these cards to dump the DeclROM. It...

My cards are packed away in boxes for moving right now. But if you can't get part numbers from others, I should be able to get them within a month or so.

Yes, it did provide an increase in benchmark scores. The speedsys CPU score increased by 5-10 points and the "move" memory test was significantly faster. A DX4 with WB should be enabled by default on a 290 if it is set to 3x multiplier and has the bodge wire on the back of the CPU socket. If the...

Yeah, everything else is placed in the resource fork of the OrangePC application. The application is where the BIOS lives and is passed into the card when you start it. What is in the DeclROM looks like just enough to get the mac to know that there is a NuBus card there so it can report it to...