Re: upgrading CBM-3040?

From: Ethan Dicks <ethan.dicks_at_gmail.com>
Date: Wed, 15 Nov 2017 19:46:06 -0500
Message-ID: <CAALmimmdY_AsW-5gR-VEyXLtEoD3yRjw0MKn376TQ48AuXZGdQ@mail.gmail.com>
On Wed, Nov 15, 2017 at 4:04 PM, Spiro Trikaliotis
<ml-cbmhackers@trikaliotis.net> wrote:
> Hello Ethan,
> The 4040 uses a different inter-sector gap than the 2031 and the 1540 on
> the one hand, and the 1541 and 1571 on the other hand.
>
> Note, however, that early ROMs of the 1541 (-01, -02) also used the
> inter-sector-gap of the 2031 and 1540.

Ah.  That's when came into this (I couldn't afford a 4040 back when
they were new).

I was under the impression the half-height 2031 format (DOS 2.6) was
identical to 1541, not 1540.

Is there a difference between full-height 2031 and half-height 2031?

> Thus, the later 1541 (starting with -03 ROM) should be fully read and
> write compatible with the earlier 1541, 1540, 2031 and 4040 disk.

Gotcha.

-ethan

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Received on 2017-11-16 01:00:03

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