19 Jun
2020
19 Jun
'20
5:03 a.m.
On Jun 19, 2020, at 6:07 AM, Peter Coghlan via cctalk
<cctalk at classiccmp.org> wrote:
The interfaces should all work about the same, for short cables. RS232 isn't rated as
high as the others but if you're just running a 6 foot cable across the bench that
isn't much of a problem.
Interesting that DDCMP is rated lower. I wonder why that would be. If the device handles
the data CRC, the software would do the header CRC but that is easy.
I'd expect 9600 or so for BISYNC. I forgot how CRC works -- are the escape characters
in BISYNC included in the CRC, or not? If not then you're probably looking at
software CRC. Still, 9600 baud with software CRC is doable for a J-11, so it should be
for a MicroVAX as well.
paul
...
The specifications manual says that the maximum speed for the DST32 is
19200 bps (for HDLC or SDLC) or 9600 bps (for DDCMP) but worryingly
doesn't list a speed for BISYNC which is what I want to do with it :-(
It also says the supported line interfaces for the DST32 are:
RS-232-C/V.24/V.28, RS-423-A/V.10/RS-449 and RS-422-A/V.11/RS-449 but not
V.35 which seems strange because the only reaction I have got from it so
far is using the V.35 interface cable. At least it suggests it should work
with the V.24 cables when once I manage to come up with a suitable clock.