Re: C128D floppy drive ROM

From: Marko Mäkelä (
Date: 2000-01-18 08:58:36

On Mon, 17 Jan 2000, William Levak wrote:

> I have read out the ROM twice.  It is as I have listed.  The 1571 is as
> you have indicated, but the C128D floppy is not.

Hmm, have you compared it against the 318047-01 image that is available
from <URL:>?  There
the routine is almost as Ruud says: a9 02 8d 00 18 a9 20 8d 01 18 4c 7c aa.

As you see, it stores $2000 to $1800/$1801, and not $2002.  And it makes a
jump to $aa7c instead of $ff18.  The routine at $aa7c initializes some of
the 5710 registers around $401x and finally jumps to $ff18.  The binary
dump seems to contain just lda/sta pairs and the final jmp.


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