21 Dec
2001
21 Dec
'01
9:39 a.m.
From: Bill Pechter <pechter(a)ureach.com>
IIRC the Intel 8251 did full Sync as well as
Async which was a plus. It's annoying
Yes, worked ok too.
drawback -- (DEC used it in the Robin and
Rainbow) was the lack of modem flow control
support.
Design limited but it was there in the Robin.
The robin was full modem controls on the comm
port.
I'd have killed for an 8251 with
CTS/RTS/DSR/DTR and DCD all on chip.
The only one the 8251 doesn't handle or have a pin for
was DCD. The others are all there.
Perhaps it should've been done on two chips
if Intel couldn't get it on one.
Pincount, they would have needed a 29 pin. ;)
Allison