Quadra 610: How to Tell If It Has An FPU, How to Upgrade

There are three different Quadra 610 configurations sold the in the U.S.

* Two of them contain a Motorola 68040 processor, which has an integral FPU (floating-point unit, or math coprocessor).
M2098LL/A* Macintosh Quadra 610 (8MB RAM, 230MB HD)
M2099LL/A* Macintosh Quadra 610 (8MB RAM, 230MB HD, AppleCD 300i)

* One contains a Motorola 68LC040 processor, which has no integral FPU. This configuration is sold only in the U.S.
M2319LL/A* Macintosh Quadra 610 (8MB RAM, 160MB HD, no FPU)

How to Tell If a Quadra 610 Has an FPU

• Run MacCheck or other utility that reports whether an FPU is present.
• Run a program that requires an FPU -- such as some rendering or CAD/CAM applications.
• Open the case and examine the processor. A processor without an FPU will be labelled "68LC040".

If your Quadra 610 has no FPU and you wish to upgrade, you need to purchase a third-party upgrade kit, as Apple does not offer this upgrade.