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What does the ROM\FPU do?

Submitted by DaveyPocket on September 8, 2007 - 12:01pm. 680x0 Macs and Lisa

When I opened my Macintosh Classic II, I noticed that it had a ROM\FPU Chip. What does it do? Does it help processor? If you have info please tell me. Thank you.

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tmtomh's picture

ROM essential, FPU helpful

Submitted by tmtomh on September 8, 2007 - 2:49pm.

ROM - Read Only Memory. The computer needs this in order to function.

FPU - Floating Point Unit. This chip allows the computer to do certain calculations much faster.

I don't know much about the details of the Classic II's motherboard design, but I'm surprised to hear that it has the ROM and FPU on a single chip.

Matt

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Jon's picture

IIRC, it's actually a riser c

Submitted by Jon on September 8, 2007 - 3:05pm.

IIRC, it's actually a riser card that houses the FPU, additional RAM slots, and optional ROM chips to expand what is on the motherboard.

» I am not in this world to live up to other people's expectations, nor do I feel that the world must live up to mine. - Fritz Perls

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MultiFinder17's picture

Thar be a slot!

Submitted by MultiFinder17 on September 21, 2007 - 1:52am.

Yeah, the Classic II has an internal PDS-type slot to allow ROM updates/expansions or an FPU to be attached. AFAIK, only an FPU was ever made for the slot, and they're rarer than hen's teeth.

» 2.16GHz C2D MacBook, Dual 500 Power Mac G4, Single 400 Power Mac G4, Power Macintosh 6500/225, PowerBook 540c, Macintosh Classic II, Macintosh Classic, Apple IIc+

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Jon's picture

Then maybe it's a good thing

Submitted by Jon on September 21, 2007 - 2:36am.

Then maybe it's a good thing I've got one, and a C-II mobo with no video...

» I am not in this world to live up to other people's expectations, nor do I feel that the world must live up to mine. - Fritz Perls

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