Bruce Evans f3b37f91c1 Improve input flow control. ... Use input buffer watermarks of TTYHOG-512 (high) and (high)*7/8 (low) instead of TTYHOG/2 (high) and TTYHOG/5 (low) to agree with some drivers. 512 is magic and some things depended on TTYHOG/2 >= TTYHOG-512 to work; now they depend on the 512 magic not changing and TTYHOG-512 being significantly larger than 0. This should be handled in ttsetwater(). Separate the decision about whether to do input flow control from doing it. ttyblock() now just starts input flow control (hardware and/or software) and there is a new function ttyunblock() to stop it. The decisions are the same except for the watermark changes and allowing for input expansion for PARMRK. When flushing input, try harder at first to send a start character if required, but give up if the first attempt fails. cy.c, rc.c, sio.c: Simplify: let ttyinput() handle input flow control if it is not being bypassed. Use ttyblock() to start flow control otherwise. rc.c: Use same input flow control test as elsewhere: test in a more efficient order and start flow control at >= highwater instead of at > highwater.		1995-07-31 18:29:51 +00:00
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ic	Peter's work to work around one of the most annoying bugs in the	1995-01-06 15:20:00 +00:00
atrtc.c	Merge RELENG_2_0_5 into HEAD	1995-06-11 19:33:05 +00:00
fd.c	Merge RELENG_2_0_5 into HEAD	1995-06-11 19:33:05 +00:00
fdc.h	Peter's work to work around one of the most annoying bugs in the	1995-01-06 15:20:00 +00:00
fdreg.h	An ifdef almost hit where it was supposed to go. Joerg owes me a good	1994-09-25 23:37:38 +00:00
joy.c	Remove trailing whitespace.	1995-05-30 08:16:23 +00:00
kbdtables.h	Change fkey 63 from ^[[K to ^[[~.	1995-03-28 21:30:13 +00:00
rtc.h	Here is a minor patch for FreeBSD 2.0R to allow it to recognize	1994-12-04 20:22:20 +00:00
sio.c	Improve input flow control.	1995-07-31 18:29:51 +00:00
sioreg.h	Submitted by: Bill Paul (wpaul@ctr.columbia.edu)	1995-01-20 07:34:18 +00:00
syscons.c	Move the inline code for waking up writers to a new function	1995-07-22 01:30:45 +00:00
syscons.h	Fix races in scstart(). q_to_b() wasn't called at spltty(), so there	1995-07-11 18:34:30 +00:00
timerreg.h