Very nice work, Jim! I’ll be watching this, with interest, as I don’t have normal SS/SD floppy, for my 4032. - Alex On Wed, Oct 21, 2020 at 08:53 Jim Brain <brain_at_jbrain.com> wrote: > Folks may remember, from last year, the Tri Mod CBM Adapter. > > Site is (was) at > https://dl2dw.de/en/diy-projects/commodore/50-trimod-cbm-adapter (sadly, > looks like site is down for maintenance) > > We discussed it: > http://cbm-hackers.2304266.n4.nabble.com/IEEE-488-adapter-for-1541-td4668108.html > > And it's been discussed at Forum64 as well: > https://www.forum64.de/index.php?thread/91569-1541-to-ieee488-trimod-adapter/ > > As noted in the CBM-Hackers thread, I started a similar project, but was > not able to finish before the other one came out. Still, I wanted to > finish mine, which I'm pleasantly surprised seems to work on first design: > > https://github.com/go4retro/Nu2031/ > > I'm working to reduce board size, in hopes of fitting in the 1541-II, and > will need to rrdo the PCB. As I do, I'm wondering if there are features to > consider. It might be possible to include the parallel port connection on > the revised PCB, but I'm also wondering if there's value in adding some > capability to auto-switch from 1541 to 2031 or vice versa modes. Right > now, it's a physical switch. (I was thinking some specific data on PORT A > and PORT B to "knock" for access. > > I also would like to revisit Spiro's note in the cbm-hackers thread about > making the ROM compatible with the 4040 (though, the thread was confusing. > It sounds like later 1541s are compatible with the 2031 and 4040, and I > used a -05 ROM and Andre's patching routine to create the pseudo-2031 ROM. > Thus, it's unclear if the resulting patched ROM is 4040/2031 compatible or > not. > > > Jim > > -- > Jim Brainbrain_at_jbrain.com www.jbrain.com > >Received on 2020-10-22 03:00:03
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