Hi again, Is there anyone within ~100 miles of the NYC area with a working IBM Displaywriter? I haven't found any more info on the signaling that goes over the DB37 data cable, and I would like to use my portable logic analyzer to sniff out some basics:
- Boot - File Read - File Write Any leads would be appreciated! -- Anders Nelson +1 (517) 775-6129 www.erogear.com On Sun, Mar 31, 2019 at 6:03 PM Anders Nelson <anders.k.nel...@gmail.com> wrote: > Hey Al, > > I haven't looked at the MAME stuff but if it uses an NEC 765 then it > probably won't be the same. The signal list is quite a bit different, e.g. > only 5 non-contiguous address bits are used. Real weird. > > I'll take a look all the same. > > =] > > On Sun, Mar 31, 2019, 4:30 PM Al Kossow via cctalk <cctalk@classiccmp.org > wrote: > >> >> >> On 3/31/19 12:42 PM, Anders Nelson via cctalk wrote: >> >> > I've read through the service manuals and other docs on Bitsavers but I >> > can't seem to find a deeper explanation on the protocol that runs over >> the >> > DB-37 cable. >> >> Have you looked at the displaywriter MAME driver? >> >> The floppy uses an NEC 765 disk controller >> >> >> >>
