Home▸ Forums▸ Macintosh Classic II, FPU / Math Card (Picture) — #54▸ Macintosh Classic II, FPU / Math Card (Picture) — #54
Post #54 by gsteemso
Source ForumMacintosh Classic II, FPU / Math Card (Picture) — #54
CategoryHardware
Post DateThu, 30 Jan 2014 - 19:19
Original URLhttps://68kmla.org/bb/threads/macintosh-classic-ii-fpu-math-card-picture.27885/
Post
...A bit off topic for the 'FPU card' side of it, but AFAIK the expansion slot on the Classic II also handles the external ROM slot as well (up to 1MB IIRC).
Click to expand...
It’s actually 2–3 MiB, varying according to a jumper on the motherboard. The Classic II can have up to 4 megs of ROM, and the jumper determines whether 1 or 2 of those megabytes are on the motherboard.

If you're designing a board at all, why not include the potential future ROM upgrades by including a ROM socket as well?
I'd love to see a "IIsi" style ROM for the CII in the future... ;)
Click to expand...
Well, yes, that’s exactly what I’m working towards. See earlier posts in this thread.

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