The Turbo601 for the IIci only ever used a PPC601 chip. There was no PPC603(e) version. There was no PPC603 based upgrade for 680x0 desktop machines.
As far as I remember, no one but Daystar ever made a PPC upgrade for the IIci, so I suspect, but am not certain, that Cameron's user is misremembering and has a Daystar upgrade, not a Sonnet upgrade.
Although, I think there was a rumor than Sonnet (or someone else?) might pick up Daystar's tooling and do another run of Turbo601 upgrades after Daystar sunk. As I remember, by that time PPC601 chips were out of production and demand was dubious, so I'm certain that never happened.
Not entirely certain how this applies to JT's brain-cyclones as I too have trouble sensibly interpreting them, but that's what I know, for what it's worth.
I had a Turbo601/66 in my IIci back in the day. It was cool the way a dancing bear is cool. It's not that it dances so gracefully, it's that a bear is dancing at all. But there were many compatibility eccentricities with the type of high-end upgrades a person who would be inclined to buy a Turbo601 is likely to already have, and it really just wasn't that much faster. I decided that a nice Turbo040 is the way to go in the IIci.
If you must have PPC and NuBus slots, get one of the NuBus PowerMacs, or the very cool Power Computing Inc. Power 120.
As far as I remember, no one but Daystar ever made a PPC upgrade for the IIci, so I suspect, but am not certain, that Cameron's user is misremembering and has a Daystar upgrade, not a Sonnet upgrade.
Although, I think there was a rumor than Sonnet (or someone else?) might pick up Daystar's tooling and do another run of Turbo601 upgrades after Daystar sunk. As I remember, by that time PPC601 chips were out of production and demand was dubious, so I'm certain that never happened.
Not entirely certain how this applies to JT's brain-cyclones as I too have trouble sensibly interpreting them, but that's what I know, for what it's worth.
I had a Turbo601/66 in my IIci back in the day. It was cool the way a dancing bear is cool. It's not that it dances so gracefully, it's that a bear is dancing at all. But there were many compatibility eccentricities with the type of high-end upgrades a person who would be inclined to buy a Turbo601 is likely to already have, and it really just wasn't that much faster. I decided that a nice Turbo040 is the way to go in the IIci.
If you must have PPC and NuBus slots, get one of the NuBus PowerMacs, or the very cool Power Computing Inc. Power 120.