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herd's latest activity
H
herd
replied to the thread
Experiments with G4 external/backside cache
.
More data points to better see what's going on, and both views on the same plot:
Wednesday at 3:09 PM
H
herd
replied to the thread
G4 cube an Sonnet Encore ST Duet G4
.
Speed/voltage are configured with resistors on the Sonnet PCB. 68kmla.org/bb/index.php?threads/overclocking-the-sonnet-encore-st-g4.38487/
Sunday at 10:27 PM
H
herd
replied to the thread
G4 cube an Sonnet Encore ST Duet G4
.
Is this the same Cube that wouldn't work with the Sonnet "1.2"? What was the problem there? Without much to go on, I would guess it's...
May 10, 2024
H
herd
replied to the thread
Saving a 3400c logic board
.
Going by your pictures, that's a test pad. There was never a component connected to it.
May 9, 2024
H
herd
replied to the thread
Interest in adapting 744x to 7400?
.
I have put 7447/7448 chips onto a variety of other boards, but the 7450 adapter is something different. The only 7450 type CPU boards...
Apr 28, 2024
H
herd
replied to the thread
Interest in adapting 744x to 7400?
.
The extra cache seems to have a bigger benefit on the slower bus in the Cube:
Apr 26, 2024
H
herd
replied to the thread
Interest in adapting 744x to 7400?
.
Someone sent me some 7448 chips to install, and I can report that they also work fine on these boards with the 7400 adapters. The...
Apr 25, 2024
H
herd
replied to the thread
iMac G3 (Rev A -> C) G4 CPU Upgrade
.
Thanks for sharing your results! I was tinkering a bit with a 7410 in a Pismo and tried it at 1.6v and 500MHz. It was happy with these...
Apr 23, 2024
H
herd
replied to the thread
Pismo (G4) Firewire weirdness?
.
Does the external drive have its own power, or are you powering it through the Pismo?
Apr 20, 2024
H
herd
replied to the thread
Pismo (G4) Firewire weirdness?
.
What firmware version does your Pismo have?
Apr 19, 2024
H
herd
replied to the thread
Experiments with G4 external/backside cache
.
I added data for the 256KB setting. This plot also shows another way to look at the same data. With zero L2 cache as the baseline...
Mar 30, 2024
H
herd
replied to the thread
Experiments with G4 external/backside cache
.
This shows testing with sorting arrays of integers. The size of the arrays increase: 16KB, 32KB, 320KB, 3.2MB, 32MB, and 64MB. The...
Mar 30, 2024
H
herd
posted the thread
Experiments with G4 external/backside cache
in
G3/G4/G5 Power Mac, iMac & eMac
.
On the G4 CPU, the external memory cache is configured with a register. In the following example a 600MHz 7400 CPU has an actual 2MB of...
Mar 30, 2024
H
herd
replied to the thread
550MHz G4 PowerBook (Pismo vs Titanium)
.
I think some of the reported L3 issues are firmware or power-saving related. Maybe some of the firmware experts could figure out the...
Mar 6, 2024
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