I successfuly exchange 1 GHz CPU on my second Pegasos 2 to this one:
MC7447B 1667 MHz ( from ebay / 10,- USD )

Just now it is overclocked to 1800 MHz and I start testing...
Peg2-1800MHz.jpg

And I have question:

if CPU clocked to default 1667 MHz, SmartFirmware shows cpu0: PowerPC,7447A CPUClock 3428 Mhz
if CPU clocked to 1800 MHz, SmartFirmware shows cpu0: PowerPC,7447A CPUClock 1799 Mhz
Why Smart firmware ( and OS too ) shows double value for 1667 and are there way howto fix it?

P.S. in meantime when I waiting for Mirari, I has to upgrade a little bit my pets.


[ Edited by sailor 09.09.2025 - 16:15 ]

I would just be silent about the wrong display and show everybody "look, I have the fastest G4 in the world in a 3.4GHz Peg II!"

I have no idea how SmartFirmware calculates, though.

Congrats on that catch, let us know if it runs stable in the long run. I wonder if it's worth the risk. Mine is still at 1.0GHz. It would hurt if I broke not just a 10 EUR CPU but maybe also the CPU module or even the mainboard.

[ Edited by Sprocki 09.09.2025 - 17:32 ]

Quote:

At least the OS part is easy to answer. MorphOS HAL just picks up what it gets from OpenFirmware.

Quote:

It's worth the risk, but only if you have someone experienced who really knows how to replace a BGA CPU.
Second issue is VCore voltage, it should be suitable to new CPU. And everything all is easy

Quote:
Thanks. Probably I should edit nvramrc script. I have no experience with this. On the other way I could set here displayed frequency value to something like 5.5 GHz and make some cool screenshots with AMD-fast G4

> I successfuly exchange 1 GHz CPU on my second Pegasos 2
> to this one: MC7447B 1667 MHz […]
> Just now it is overclocked to 1800 MHz and I start testing...

Congratulations. I don't think anyone managed to run a Pegasos II beyond 1.4 GHz 7447A (#10) before.

Congrats!
I suppose it's something like this.

I just finished testing and upgrading my Pegasos 1.8 GHz:
BackdropPegas.jpg
MorphOS reports L2=256 KB, but in real cache is 512 KB - see ramsmp output.

AmigaOS reports L2 correctly: AmigaOS-1.8GHz.jpg

Anyway this super machine received Radeon 9800 PRO and SATA controller.
It is now my main MorphOS computer until Mirari will came. ( Powermac G5 Quad is too loud )

This makes me wish that there were a Pegasos III.
Freescale MPC7448 @ 2.0 Ghz with 200 Mhz bus
DDR2 RAM? (though the last PowerBook had to run it at a slower 333 Mhz clock)
I guess because it already has FireWire400, throw in FireWire800 as well.
If paired with Freescale's MPC8641 processor, you could get a 667 Mhz bus, dual 64-bit memory controllers, PCIe graphics capabilities, and SATA drives. ~17 years ago, this would have been killer.

> This makes me wish that there were a Pegasos III.
> Freescale MPC7448 @ 2.0 Ghz with 200 Mhz bus

This spec (almost, as 2.0 GHz would have been overclocked) was termed "Pegasos 2.5" back then by Genesi :-) It was (to be) essentially a Freescale HPC II ("Taiga") with Genesi OpenFirmware.
Btw, as Genesi was listing its High Density Blade (HDB) with up to dual-MPC7448 and Tsi109 as an available product at least from early 2006 to early 2007 (and as a discontinued product since then), has anybody ever seen this board (photo or own eyes)?

> paired with Freescale's MPC8641 processor

This was announced as the Pegasos 8641D by Genesi :-)
Unfortunately, this didn't come to fruition, and neither the Efika 8610 nor the OSW/TetraPower (while the latter became the PowerStations's Bimini board, so in a way the TerraSoft/Fixstars PowerStation with PPC970MP and CPC945 is the closest to a Pegasos III that came to be).


Edit: Changed some links for more information

[ Edited by Andreas_Wolf 14.10.2025 - 10:28 ]

Yes, it could be nice machines.
Pegasos 8641D: 02-Pegasos-8641D.jpg
Pegasos III alias TetraPower: 03-Pegasos-III-Tetra970MP.jpg

In any case, I have one "new" 7448 CPU, for Powerbook G4 of for other Pegasos 2
Unfortunately, there is no computer with 200 MHz bus.