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LC 575 L2 cache card
- Thread starter jasa1063
- Start date
I may be completely wrong....
But I think any cache card in the LC575 would have to go in the LC-style expansion slot, and because of the compromises made to keep it compatible with the original LC slot, I suspect performance would not be very good. There might have been a cache that plugs in between the 68040 and the socket.
Point is, I don't think there was a cache for that line. But again, happy to be proven wrong.
But I think any cache card in the LC575 would have to go in the LC-style expansion slot, and because of the compromises made to keep it compatible with the original LC slot, I suspect performance would not be very good. There might have been a cache that plugs in between the 68040 and the socket.
Point is, I don't think there was a cache for that line. But again, happy to be proven wrong.
Sonnet's QuadDoubler was only for Centris/Quadra machines, and I don't think that included the 605 (LC 475). Per a Wayback Machine view of the product page, was only these models:
I'm with trag on this one. Here's a quote from the LC 575 Developer Note:
Edit: I suppose that something could be designed to simply (hah!) stack, like the QuadDoubler, into the 68040 socket with the CPU on top. But there might be further eccentricities in the board design that may prevent something like this from working.
So nothing turnkey, I'm afraid.
I'm sure that the more esoteric manufacturers weren't making much, either. Even MicroMac only ever had a full 68040 for the LC 575, or an LC 575 board upgrade for the Color Classic—both of these listed as 'upgrades' on their site... heh
I'm with trag on this one. Here's a quote from the LC 575 Developer Note:
And further into the manual:
It sounds to me that no L2 cache could be constructed to be slotted into the LCPDS , as its interface is not designed in any way like the Centris/Quadra PDS slot. So, things like ethernet and other expansion cards could work.
Edit: I suppose that something could be designed to simply (hah!) stack, like the QuadDoubler, into the 68040 socket with the CPU on top. But there might be further eccentricities in the board design that may prevent something like this from working.
So nothing turnkey, I'm afraid.
My whole reason for asking was I came across this post from lowendmac.com: It mentions there was a supplier for an adhoc L2 Cache Card for the LC 575, but the post is from way back 1998.
lowendmac.com
Level 2 Cache for the 68040 - Low End Mac
A Level 2 (L2) cache was a popular way to boost performance on faster 68030-based Macs, including the Mac IIci, Mac IIvx, and Mac IIfx. But none of the 68040-based Macs shipped with an L2 cache, although most were capable of using one. The L2 cache is automatically accessed by the 68040 series...
lowendmac.com
I'm not sure if these ever came to market, if they were even produced. I'm betting less than 20 were ever made. I mean, if they still exist and you can find them, more power to you! Not trying to be belligerent about it, just real.
I found this other report that there isn't a way to get the case closed again, in the case of the 475, and that makes me wonder about the clearances inside of a 575 or CC, but it might be a different configuration.
Incidentally, the QuadDoubler Cache variant mentioned is real; a member posted theirs in a thread on recreation of the QuadDoubler (with cache I believe). Though the Newer Technology one mentioned in that other note seems very interesting...
68kmla.org
It all comes down to the orientation of the CPU slot and clearance. Not sure if anyone's thought about making an adapter, as you'd be adding a lot of height with each rotation/reconfiguration of the pinouts. But I'm not the hardware recreation expert
I found this other report that there isn't a way to get the case closed again, in the case of the 475, and that makes me wonder about the clearances inside of a 575 or CC, but it might be a different configuration.
Incidentally, the QuadDoubler Cache variant mentioned is real; a member posted theirs in a thread on recreation of the QuadDoubler (with cache I believe). Though the Newer Technology one mentioned in that other note seems very interesting...
Sonnet Quaddoubler project
Looking for a Quaddoubler at a decent price...now here is the caveat. I want to destroy it.......in the interest of reverse engineering one and then being able to get them at a decent price. Many cards have been reversed engineered in Amiga land and this would be a very beneficial one for...
68kmla.org
It all comes down to the orientation of the CPU slot and clearance. Not sure if anyone's thought about making an adapter, as you'd be adding a lot of height with each rotation/reconfiguration of the pinouts. But I'm not the hardware recreation expert
Thanks for your input and I knew it was a long shot anyway. I did replace 68LC040 with a 68040 as I do have some floating point intensive software I run for Fractals and Ray Tracing,I'm not sure if these ever came to market, if they were even produced. I'm betting less than 20 were ever made. I mean, if they still exist and you can find them, more power to you! Not trying to be belligerent about it, just real.
I found this other report that there isn't a way to get the case closed again, in the case of the 475, and that makes me wonder about the clearances inside of a 575 or CC, but it might be a different configuration.
Incidentally, the QuadDoubler Cache variant mentioned is real; a member posted theirs in a thread on recreation of the QuadDoubler (with cache I believe). Though the Newer Technology one mentioned in that other note seems very interesting...
Sonnet Quaddoubler project
Looking for a Quaddoubler at a decent price...now here is the caveat. I want to destroy it.......in the interest of reverse engineering one and then being able to get them at a decent price. Many cards have been reversed engineered in Amiga land and this would be a very beneficial one for...
It all comes down to the orientation of the CPU slot and clearance. Not sure if anyone's thought about making an adapter, as you'd be adding a lot of height with each rotation/reconfiguration of the pinouts. But I'm not the hardware recreation expert
