Re: Upgrade 2040/3040 DOS 1 floppy drive to DOS 2?

From: William Levak <*wlevak_at_SDF.LONESTAR.ORG*> Date: Tue, 3 Aug 2010 06:16:15 +0000 (UTC) Message-ID: <Pine.NEB.4.64.1008030614020.14825@sdf.lonestar.org> · wlevak_at_SDF.LONESTAR.ORG

On Fri, 30 Jul 2010, Anders Carlsson wrote:

> Now that I have good faith I can put together at least two or three
> working floppy drives, I wonder if there is any way to upgrade them
> to a newer DOS version. My EPROM programmer can handle 2532 chips,
> so upgrading the ROM is not a problem, but I have noticed that a
> DOS 2.x floppy drive uses a different 6530 RIOT than a DOS 1.

I tried that some years ago.  Apparently there is a timing problem with 
both processors sharing the bus.  At any rate, 2532 EPROMS did not work.

wlevak@sdf.lonestar.org
SDF Public Access UNIX System - http://sdf.lonestar.org

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