RE: CBM-900 floppy disk format/encoding

From: Hoffmann-Vetter, Martin <*martinHV_at_arcor.de*> Date: Mon, 9 Jan 2012 17:53:07 +0100 Message-ID: <001f01ccceef$2a353f20$6800a8c0@mhv.webmade.com> · martinHV_at_arcor.de

Hello Garit,

> 6508R2? From the MOS numbering scheme that should be a CPU. Any idea
> what it is exactly?

It's an 6502 with IO-Port (see 6510) and 256 Bytes RAM! Have a look at
http://en.wikipedia.org/wiki/MOS_Technology_6508 and
http://www.zimmers.net/anonftp/pub/cbm/documents/chipdata/6508.zip.

This is the floppy controller CPU!

Martin

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