narem-james@yale.UUCP (04/21/87)
From: "James E. Narem Jr." <narem-james>
Help!? I have a ATT 3B2/300 running Unix Sys V.2 with /dev/contty
connected up to a Gandalf PACX - conceptually a giant rotary switch
controled by a computer which connects various RS232 gadgets together.
You send a BREAK at it for a few seconds, hit return and it prompts
you with "enter class" and you give it a machine name.
The problem is that the ioctl TCSBRK (termio(7)) sends a break for
0.25 seconds. I tried putting it in a tight loop, but that doesn't
cut it, the PACX wants the line at 0 for at least 2 seconds. I tried
toggling DTR, but that doesn't seem to be connected to the PACX.
So the big ? is: Does anyone have a hack to send a variable length
break on a 3b2? Thanks for any help.
..........jim (Narem@Yale.ARPA, cmcl2!yale!narem, Narem@YaleCS.BITNET)