9 Oct
2025
9 Oct
'25
8:30 p.m.
Didn't it allow DECnet/DOS over serial lines, too?
Warner Losh via cctalk <cctalk(a)classiccmp.org> schrieb am Do., 9. Okt.
2025, 22:17:
On Thu, Oct 9, 2025 at 12:32 PM Nigel Johnson Ham via
cctalk <
cctalk(a)classiccmp.org> wrote:
On 2025-10-09 13:34, Paul Koning via cctalk
wrote:
http://www.bitsavers.org/pdf/dec/rainbow/ms-dos/AA-DY84A-XV_Rainbow_Using_t…
tells how to use it with a DEC Rainbow. So all the ports are RS-232. It
was used to share Printers and modems to the Rainbow (though modems had
weird restrictions iirc). I don't know if the protocol has been
reverse-engineered (likely it has), but the MS DOS 2.11 programs are small.
Warner
I was poking around eBay and up came a listing
for a DEC "mini
exchange", DFMSA. What is that? The name doesn't sound familiar. It
looks like a box with a bunch of DB25 connectors on the back, but that
doesn't help much.
paul
I had one once. AFAIR it is just a serial switch to access different
peripherals from one port on the CPU. Possibly switchable by control
sequences. That was 35 years ago though so I am not sure of setails!