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alectrona2988
has anyone tried to upgrade the L2 cache or the CPU on a sonnet crescendo L2 card? i have an old G4 7400 card sitting around, plus a crazy idea... but i guess i would only just be able to get 1MB of L2 from 512KB given my equipments capabilities...
P
Hi Berenod,
did you succeed with your inquiry for the pinout of M7783?
I have also a blown up AC-Adapter and would like to replace it with a standard 24 V power supply.
Does it really only need 1 voltage?
I am confused about the 3 Pin connector and don't know where to apply the 24 V.

Appreciate your help
Peter
M
More new shiny things:
IMG_3489(1).JPG
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alectrona2988
alectrona2988
very nice!!! is there a github page for it?
M
max1zzz
Not quite yet, ned to verify this version of the PCB works, once I have done that they will be going on GitHub :)
alectrona2988
alectrona2988
fair, good to make sure its not gonna fry those custom ICs... haha. glad to see people doing this kind of work, especially with the SE/30 and IIfx
alectrona2988
did an onboard RAM upgrade on my IIsi not too long ago, swapped out the 128KB chips for 512KB chips and now my IIsi has 4MB of 70ns onboard memory. yes it will likely make it slower, but i felt like it, also i know i am not the first one to do this lol
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croissantking
croissantking
That’s fun! Not much point, but fun.
alectrona2988
alectrona2988
yeah, really no point in doing this unless you wanna take the time and effort to do it... lol. honestly it feels more responsive but thats probably just the 25mhz overclock and a nubus riser card (which also gives you an FPU) i got from a friend. now to find a good sca 80 pin scsi to 50 pin adapter with proper termination. @max1zzz still got any around?
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max1zzz
Nee to have a look if I have any assembled, if not I still have loads of blank PCB's and components, drop me a PM :)
alectrona2988
has anyone tried to use a manual inject floppy drive on a mac that takes auto drives?
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Phipli
Phipli
Puts a little bit of silicone grease in the gearbox? Might help.
alectrona2988
alectrona2988
did that, still noisy. like something's grinding, even though the gears are still perfectly fine. i think the motor is worn out??
Phipli
Phipli
If it is the actual motor it might be contamination. Have you put some machine oil on the motor bearings? Can't remember if you can get to them.

Does it make the noise when you run the motor not inside the floppy drive? Unscrew it and lift it out, but leave it plugged in. It should run continuously when you eject I think.
M
New shiny thing in testing:
IMG_3480.jpg
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max1zzz
Well if someone wants to donate a LC PDS video card to the cause! :ROFLMAO:

Adding multiple PDS cards gets a bit more complicated as you have to handle card selection, smooshing one card and a accelerator together is much easier as the accelerator is not really a PDS card. Maybe I need to get my hands on one of those crazy expansion chassis's that let you have multiple PDS card sin a LC.....
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robin-fo
robin-fo
I have a Radius Pivot LC PDS card. How would you clone the main ASIC there? Wouldn‘t it be more feasible to adapt some simple PDS video card logic (maybe even SE/30 internal video bumped to 640x480)?
C
cheesestraws
yeah - I have a spare LC PDS graphics card but it looks like it relies on unobtainium chips so it probably wouldn't help you much.
C
*rolling the bad idea dice* NT4 on alpha running services for mac, for no apparent or good reason
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finkmac
finkmac
but what if the idea was worse?

"running on a multia"
C
Cory5412
You know, I'm actually not sure that the multia would be any worse at basic file services than the alphastation I've got, I suppose it'd depend on what internal and external storage it allows. And, you can argue how much that matters with modern SCSI replacers... hmmmm
Juror22
Juror22
Thanks for reminding me that I have an Alpha box in my queue of things as well... focus! focus!
CircuitBored
This is hands-down one of the strangest things I've ever seen in an electronic device. Do we think it's there for ease of replacement or because someone said "sod it, put it wherever it fits"?
IMG_7402.jpeg

(Sony HVC-3000P)
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Phipli
Phipli
Agree with demik.

Used to be common to find high power parts thermally coupled to the chassis or case. Weird thing is that it isn't mounted from the PCB, but perhaps they were expecting vibration / movement?
CircuitBored
CircuitBored
@demik @Phipli oh yes, I've seen the chassis used as a heatsink plenty. I've just never seen a component like this just floating, connected only by a block connector! Having given the rest of the unit a once-over it seems like they really had no other place to put it, as the two main control boards are quite surprisingly air-gapped from the chassis, save for some grounding wires.
luRaichu
luRaichu
C
well this is extremely silly

IMG_3034.JPG
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Phipli
Phipli
1000017411.jpg

My 400MHz G4 works, although BeOS doesn't recognise the processor correctly. Gets the speed wrong and calls it unknown. Guess my 466MHz G3 would be faster given BeOS isn't using Altivec.
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Phipli
Phipli
1000017413.jpg


I realise that my cache must not have been set up properly on my G3 466MHz because I don't imagine BeOS is altivec optimised, so there is no reason for the G4 400 I just benchmarked in a virtualised Mac to outperform my previous high score from the faster G3.
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Phipli
Phipli
Updated performance of my Interware 466MHz card. The cache mustn't have been enabled properly before. Here I have speculative addressing turned off. Not sure if I could work out a more optimised mode with it on for some memory regions and... We'll, off for slots etc.

1000017439.jpg
ClassicGuyPhilly
20240331_162224.jpg
I am overjoyed to report another IIfx has been brought back to life! While many played their part in making this happen I must call out @ilitch64 for his amazing repair work, @joshc for his bottomless IIfx knowledge, and @Phipli for his ever-present encouragement to do more and go further! :)
ClassicGuyPhilly
When one ridiculous retro obsession meets another :cool:
20240330_143736.jpg
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ClassicGuyPhilly
ClassicGuyPhilly
So as I take a break here's the background. I found a couple cassettes of my college radio shows from 1995 and 1996. Bought the JVC tape deck off eBay and digitizing to share w college friends. Best part...the one show is fittingly called "A Classic Show" - was my Classic Rock Tuesday 4-6pm show. Classic then and now! ;)
Phipli
Phipli
Needs more LEDs

ClassicGuyPhilly
ClassicGuyPhilly
Yes...yes I do @Phipli ! That's sweet.
M
First draft:
1711800205897.png
Still needs a little tweaking but it;s almost there
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zigzagjoe
zigzagjoe
Yeah. I've got a source for the 15ns that's been reliable, but anything faster is impossible to get. I stripped some powermac cache modules when I was experimenting pushing my Diimo and Carrera clones. I did get some 10 or 7ns TAGs from Utsource, but they looked ... manky... so I've not tried to see if they're any good.
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max1zzz
Very likely they will be remarked 15ns parts. At least that is what the last batch of 10ns ones I brought from them seemed to be. Still real 71B74's though so are usable on designs that tolerate slower parts
Phipli
Phipli
Don't forget the slot cover holes 😆
CircuitBored
I thought this was the coolest setup back in the day. This was right at the tail end of PPC's relevance.

2012-08-04 19.16.48.jpg
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Snial
Snial
I think PPC is still relevant!
  1. It proved the principle of emulation for jumping CPU architectures! (cf the history of 286, x86, x64, ARM64 emulation mess in Windows: http://www.emulators.com/docs/abc_arm64ec_explained.htm)
  2. It took us into the Mac OS X era and 64-bit era (just).
  3. It took us close to max GHz!
History_SE30_Dude
History_SE30_Dude
For a long time I used both my 1.42 MDD and a Intel Mini in a similar setup. I found some software I can't remember the name that allowed me to use my keyboard and mouse across both systems it worked really well from what I remember. I thought I was super cool with that setup.😎🤓
CircuitBored
CircuitBored
@Phipli The second computer was a Quicksilver, which I upgraded to dual 1GHz not long after this photo was taken. The eMac can indeed only mirror its video, sadly.
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