MacSnap RAM Upgrade for Macintosh 512Ke

I recently came across an unused Dove Computer MacSnap RAM upgrade on eBay, so I bought it and installed it in my Mac 512Ke to bring its RAM up to 1 MB.

screenshot of macintosh showing 1024K RAM installed

Dove MacSnap

MacSnap was a series of memory upgrades from Dove Computer for various compact Macs. Unlike newer computers where one can just pop in another SIMM to upgrade its memory, upgrading these Macs required a lot more components.

macsnap box
macsnap box contents with board, diskette, and manuals

For the 512Ke, the MacSnap uses the factory 128k ROM and just piggy backs onto six of the ICs on the original motherboard.

top of macsnap board
bottom of macsnap board


Installing the MacSnap requires removing the rear case, unplugging the analog board and floppy drive, and sliding out the motherboard.

macintosh disassembled
macsnap board installed onto macintosh motherboard

Next, the MacSnap board literally just snaps onto the motherboard (with a lot of force required) with its piggyback adapters clipping onto the motherboard ICs.

It's important to apply enough force to get the sockets to fully clip together. The first time I tried, I didn't have them sandwiched close enough together and the Mac was still showing only 512K of RAM.

macsnap board incorrectly installed and sticking up a bit
MacSnap installed incorrectly
macsnap board correctly installed and seated fully on motherboard
MacSnap installed correctly

Once the upgrade is installed, just slide the motherboard back into the case, reattach the analog board harness and floppy drive cable, and put the rear case back on.

macsnap board fully installed onto macintosh motherboard

No extensions or other software are required and the Mac sees all 1024 KB of RAM at startup. The MacSnap package came with a diskette for RamSnap which is a ram disk application, but it's not required.

screenshot of macintosh showing 1024K RAM
screenshot of flying toasters displaying on macintosh

With everything installed and hooked up, I am now finally able to use the Flying Toasters screensaver of After Dark, which I couldn't before due to RAM constraints. StuffIt Expander is also able to extract some archives that it wasn't able to due to limited memory.

I'm also able to run MacTCP, MacPPP, and a client application simultaneously, making my Mac finally able to communicate with the internet natively with its own IP stack instead of having to rely on a WiFi232 to make all of its TCP connections. These screenshots show Fetch making an FTP connection and Eudora able to receive POP3 e-mail:

screenshot of fetch running on macintosh, connected to openbsd FTP site
screenshot of eudora running on macintosh and notifying of new mail
Questions or comments?
Please feel free to contact me.