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Yes 100%, go with BlueSCSI v2 if you can. Makes doing stuff like this just so much easier. Then on macintoshgarden.org, you can easily get all the install media up through OS 9.2.2.

Yep one step at a time. Up to 9.1. Now moving on to 9.2.2. For no particular reason but the fun of it :)

Yes and Yes to all this @croissantking! Here it is now with 9.0.4. Taking baby steps.

I am interested in pushing this to 9.0.4 next. But can certainly say it is noticeably slow with 8.6, which isn't a surprise when considering the slow bus speeds. I think maybe what I want to see is if it would be possible to watch a YouTube video somehow on a Blackbird. I haven't actually done...

Although I like to stay true to my 68K roots, I recently acquired a PB 540c with the Apple 603e 100MHz upgrade card. So decided to take this up to OS 8.6, because why not? :)

Almost spit up my Diet Coke reading this comment @shirsch!!! But seriously though, there are several things I am waiting to buy from Jurassic Computing. Now I need to add this shim to my list.

Jumping on this old thread, I think I am going to get the NF-A8 PWM for my Quadra 700 power supply. I finally got to see a Noctua fan up close in an LCIII that I bought from @jmacz. I am in love with that fan! So it looks like the NF-A8 PWM has a 4-pin connector. Did you all just splice up the...

Just took the poor man's approach. I modified the highlighted manufacturerId (C2C2) and deviceId (A4A4) in the CODE2 resource of the Flash Tool with the appropriate values for my ICs. Worked like a charm. (Proceed with caution however, make sure you enter the right values, understand the type of...

Decided to play with this a bit last night. Very simple issue, the UnlockFlash(9090) command simply tells the ICs to expose their manufacturer ID and device ID at address 0000 and 0001. I was getting really stuck on the ROM having BBBB at these addresses. So basically just need to recompile...

Very well done!! I can only marvel at this reverse engineering :)

To help keep myself organized, I put together a template to use for several iterations of testing different ROMs and SIMMs on my Q650. Attached are my notes, and admittedly my handwriting is AWFUL! But, I think this testing confirmed to me at least that the memory is being sized correctly...

@schrockwell if you get to the point of selling any completed board builds, I think you'll have some buyers! I'd like to get in line :)

Yes same with mine. Initial guess is it has to do with the amount of space in the ROM for the updated chime. A while ago I tried replacing the sound bytes, but ran into some issues. I'll need to revisit that again soon.

Here is probably a better way to visualize what I am trying to say. I'll do some more testing tonight. If this is how it works, then technically I suppose a single installed double-sided SIMM would never be interleaved (ie, banks 2 and 4 populated). So this would be a good way to test this theory.

@cy384 I'm still digging into this. I wanted to bounce this off of you, so I quoted your above post here. This is from when you booted with 3x 128MB SIMMs. I am wondering if the banks are setup like this in the Q650? So take just one 128MB SIMM.... I see from the wombat tool that it shows the...

Throw in a ROM SIMM slot, then that will open up new avenues of fun and expansion :)

OK very interesting! No I hadn't seen this thread yet. What you are saying in this thread surely makes sense to me, and I may give this a go (ie, hardcoding the values). I did re-write large chunks of the resizing code in assembly but that hasn't cracked the nut yet.

Yes I may take you up on this. I'll certainly pay for the card too. I did go so far as zeroing out banks 0/1 in the SIZEMEMORYPATCH routine in the ROM. But basically same behavior. Although one time I did get the system to boot just fine with 3x 128MB SIMMs. So banks 2/3 4/5 6/7 were each the...

Unfortunately not. I was thinking about getting one however. With the OneBufferedBit set, I can tell the Q650 boots all the way into the OS as the normal soft shutdown does the alert, then enter powers it down. I have some new SIMMs on the way: each chip 16Mx4 (=8MB), 8 chips per bank (=64MB)...

I'm pretty close to getting 512MB to register in the Q650, at least I hope. I do think it may have to do with the power/voltage drain by the big SIMMs. When I poke the 50F0E000 register and set the OneBufferedBus bit, the Q650 posts and does a full boot with 4x 128MB SIMMs. But by setting this...