20 Apr
2019
20 Apr
'19
3:47 p.m.
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.nelson at 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 at 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
>
>
>
>