Re: IEEE-488 adapter for 1541

From: Francesco Messineo <francesco.messineo_at_gmail.com>
Date: Sun, 7 Apr 2019 11:13:47 +0200
Message-ID: <CAESs-_zKT55KUTZXjE0zqwPrc7x1y5=uNkatKuY-E_dk+rWdpg_at_mail.gmail.com>
Hi Spiro,

On Sun, Apr 7, 2019 at 10:14 AM Spiro Trikaliotis
<ml-cbmhackers_at_trikaliotis.net> wrote:
>
> Hello,
>
> * On Sat, Apr 06, 2019 at 11:05:21PM +0200 Francesco Messineo wrote:
>
> > does the 2031 firmware make a write compatible format with the 4040?
> > If yes, why did commodore change the 1541 code?
>
> No, it is not. The 2031 and 1540 are not write-compatible, the early
> 1541 are not, but later 1541 (starting with 901229-03) are write
> compatible with both 2031 and 4040:
>
> http://cbm-hackers.2304266.n4.nabble.com/C64-IEEE-interface-tp4659295p4660079.html
>
> http://www.softwolves.com/arkiv/cbm-hackers/11/11677.html
> (have a look at the discussion of "GAP" being $08 or $09)

Yes, I've read again those threads, so my next question is: what
changes need to be made to the 2031 firmware to make it write
compatible with the 4040? Is there a single byte to change to have 10
bytes gap like the 4040 does?

Frank
Received on 2020-05-29 21:43:16

Archive generated by hypermail 2.3.0.