Performa 275 (Colour Classic II) with 68040 but everything I see says it should have a 68030.

[Happy_Mac]

Hello. My first post so be easy on me. Been collecting vintage computers for close to a decade. I came upon a Performa 275 on Yahoo Japan Auctions. It arrived safely but I’m doing the standard maintenance on it. Floppy needed lubricating. Rayovac 840 battery needs replacement. Hard drive was removed from the machine so I added a 300GB 15k RPM SCSI Hard Drive (overkill I know but it’s what I had and it’s new old stock) Installed 7.5.5 English on the first 4GB partition. Plan to try Born Again to put 8.1 dual boot on it. Upgrading from 20 to 36 mb of ram. Will recap soon. So anyways to my point. Everything I see says that the Performa 275 should have a 68030 and to get born again to work it needs a 68040 with fpu. When I looked at the main board I saw that it indeed already has a 68040 but everywhere I go it says that should be a 68030. Was this possibly upgraded or did they offer a 68040? Seeing that it was only sold in Japan and South Korea it is hard to get much info or even YouTube videos about it. Does XC68LC040RC33B have a built in FPU? She’s a beauty but I’m a little unfamiliar with some of the do dads.

Thanks for any thoughts!

 

[Happy_Mac]

OMG I feel dumb. I just realized this is an LC575 motherboard (Mystic) so that answers my question but still and thoughts about it would be fun.

 

[Bolle]

Someone installed a Performa/LC575 board... that's a common upgrade path for ColorClassic(II) and their Performa variants.
The 68LC040 does not have a FPU.

 

[Byrd]

Mystic power! Be wary of exceeding power requirements, that 15K RPM HD will suck a lot of juice (and heat) I’d look into a solid state replacement.

 

[volvo242gt]

I'd put the dremel tool-powered drive into an external case, that way you don't kill your power supply. I'd either do an SD card-based SSD setup internally, or grab a Maxtor, IBM, Seagate, etc, 2.1GB hard drive and use that as your internal. Born Again is not necessary for installing 8.1 on '040 Macs.

 

[imactheknife]

Needs recapping for sure, Nice board though.

 

[Happy_Mac]

Thank you all for chiming in!

I may go bluescsi but I had no success getting the cc to find the device. I used Disk Jockey with a 2GB (1.84 usable) SD card and made a 1GB partition on SCSI 0 and 840MB on SCSI 1 but it would not see it. Formatted card with exfat. I was able to get a different bluescsi to work on another Mac. I wonder if it’s something to do with the SD card. It’s a Lexar I think. Honestly I liked the SCSI2SD a lot better. No matter what machine I put it on, it just worked. As much as people cheer about BLUESCSI I feel like it is more finicky. Maybe user error on my part but I don’t know what I could be doing wrong. Again maybe the SD card?? Let me know if you have any thoughts on that.

Thank you all!