1.\" $NetBSD: zstty.4,v 1.16 2017/09/12 14:48:11 wiz Exp $ 2.\" 3.\" Copyright (c) 1997 The NetBSD Foundation, Inc. 4.\" All rights reserved. 5.\" 6.\" This code is derived from software contributed to The NetBSD Foundation 7.\" by Gordon W. Ross. 8.\" 9.\" Redistribution and use in source and binary forms, with or without 10.\" modification, are permitted provided that the following conditions 11.\" are met: 12.\" 1. Redistributions of source code must retain the above copyright 13.\" notice, this list of conditions and the following disclaimer. 14.\" 2. Redistributions in binary form must reproduce the above copyright 15.\" notice, this list of conditions and the following disclaimer in the 16.\" documentation and/or other materials provided with the distribution. 17.\" 18.\" THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 19.\" ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 20.\" TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 21.\" PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 22.\" BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 23.\" CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 24.\" SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 25.\" INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 26.\" CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 27.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 28.\" POSSIBILITY OF SUCH DAMAGE. 29.\" 30.Dd September 12, 2017 31.Dt ZSTTY 4 32.Os 33.Sh NAME 34.Nm zstty , 35.Nm zsc , 36.Nm zs 37.Nd Zilog 8530 Serial Communications Controller (SCC) for RS-232C, RS-422, and RS-423 38.Sh SYNOPSIS 39.Cd options PPS_SYNC 40.Cd options PPS_TRAILING_EDGE 41.Ss alpha ( DEC 3000 ) 42.Cd "zsc0 at ioasic? offset 0x100000" 43.Cd "zsc1 at ioasic? offset 0x180000" 44.Cd "zstty0 at zsc0 channel ? # serial ports on B channels" 45.Cd "zstty2 at zsc1 channel ? # serial ports on B channels" 46.Cd "lkkbd0 at zsc1 channel ? # keyboard port on A channels" 47.Cd "vsms0 at zsc0 channel ? # mouse port on A channels" 48.Ss cesfic 49.Cd "zsc* at mainbus0" 50.Cd "zstty* at zsc? channel ?" 51.Ss cobalt 52.Cd "zsc0 at mainbus? addr 0x1c800000 irq 4" 53.Cd "zstty0 at zsc0 channel 0" 54.Cd "zstty1 at zsc0 channel 1" 55.Ss ews4800mips 56.Cd "zsc0 at sbdio?" 57.Cd "zstty0 at zsc? channel 0 # SIO ch-A" 58.Cd "zstty1 at zsc? channel 1 # SIO ch-B" 59.Ss mac68k and macppc 60.Cd "zsc0 at obio?" 61.Cd "zstty* at zsc? channel ?" 62.Cd options ZS_TXDMA 63.Ss mipsco 64.Cd "zsc0 at obio0 addr 0xbb000000" 65.Cd "zstty0 at zsc0 channel 0" 66.Cd "zstty1 at zsc0 channel 1" 67.Ss mvme68k 68.Cd "zsc* at pcc? ipl 4" 69.Cd "zsc* at pcctwo? ipl 4" 70.Cd "zstty* at zsc? channel ?" 71.Ss news68k 72.Cd "zsc0 at hb0 addr 0xe0d40000 ipl 5 vect 64 flags 0x0 # news1700" 73.Cd "zsc0 at hb1 addr 0xe1780000 ipl 5 vect 64 flags 0x1 # news1200" 74.Cd "zstty0 at zsc0 channel 0" 75.Cd "zstty1 at zsc0 channel 1" 76.Ss newsmips 77.Cd "zsc0 at hb0 addr 0xbfec0000 level 1 flags 0x0 # on-board" 78.Cd "zsc1 at hb0 addr 0xb8c40100 level 1 flags 0x1 # expansion board" 79.Cd "zsc2 at hb0 addr 0xb8c40104 level 1 flags 0x1" 80.Cd "zsc0 at ap?" 81.Cd "zstty0 at zsc0 channel 0" 82.Cd "zstty1 at zsc0 channel 1" 83.Cd "zstty2 at zsc1 channel 0" 84.Cd "zstty3 at zsc1 channel 1" 85.Cd "zstty4 at zsc2 channel 0" 86.Cd "zstty5 at zsc2 channel 1" 87.Ss next68k 88.Cd "zsc0 at intio? ipl 5" 89.Cd "#zsc1 at intio? ipl 5" 90.Cd "zstty0 at zsc0 channel 0 # Serial Port A" 91.Cd "zstty1 at zsc0 channel 1 # Serial Port B" 92.Ss pmax 93.Cd "zsc0 at ioasic? offset 0x100000 # Z85C30" 94.Cd "zsc1 at ioasic? offset 0x180000 # Z85C30" 95.Cd "zstty* at zsc? channel ? # serial ports on B/A channels" 96.Cd "lkkbd* at zsc1 channel ? # keyboard port on A channels" 97.Cd "vsms* at zsc0 channel ? # mouse port on A channels" 98.Ss sgimips 99.Cd "zsc* at hpc0 offset ?" 100.Cd "zstty* at zsc? channel ?" 101.Ss sparc 102.Cd "zs0 at mainbus0 # sun4c" 103.Cd "zs0 at obio0 # sun4m" 104.Cd "zs0 at obio0 addr 0xf1000000 level 12 # sun4/200 and sun4/300" 105.Cd "zs0 at obio0 addr 0x01000000 level 12 # sun4/100" 106.Cd "zstty0 at zs0 channel 0 # ttya" 107.Cd "zstty1 at zs0 channel 1 # ttyb" 108.Cd "zs1 at mainbus0 # sun4c" 109.Cd "zs1 at obio0 # sun4m" 110.Cd "zs1 at obio0 addr 0xf0000000 level 12 # sun4/200 and sun4/300" 111.Cd "zs1 at obio0 addr 0x00000000 level 12 # sun4/100" 112.Cd "kbd0 at zs1 channel 0 # keyboard" 113.Cd "ms0 at zs1 channel 1 # mouse" 114.Cd "zs2 at obio0 addr 0xe0000000 level 12 # sun4/300" 115.Cd "zstty2 at zs2 channel 0 # ttyc" 116.Cd "zstty3 at zs2 channel 1 # ttyd" 117.Ss sparc64 118.Cd "zs* at sbus? slot ? offset ?" 119.Cd "zs* at fhc?" 120.Cd "zstty* at zs? channel ? # ttys" 121.Cd "kbd0 at zstty?" 122.Cd "ms0 at zstty?" 123.Ss sun2 124.Cd "zs0 at obio0 addr 0x002000 # 2/120, 2/170" 125.Cd "zs1 at obmem0 addr 0x780000 # 2/120, 2/170" 126.Cd "zs0 at obio0 addr 0x7f2000 # 2/50" 127.Cd "zs1 at obio0 addr 0x7f1800 # 2/50" 128.Cd "zs2 at mbmem0 addr 0x080800 # 2/120, 2/170 (first sc SCSI)" 129.Cd "zs3 at mbmem0 addr 0x081000 # 2/120, 2/170 (first sc SCSI)" 130.Cd "zs4 at mbmem0 addr 0x084800 # 2/120, 2/170 (second sc SCSI)" 131.Cd "zs5 at mbmem0 addr 0x085000 # 2/120, 2/170 (second sc SCSI)" 132.Cd "zstty* at zs? channel ? # ttya" 133.Cd "kbd0 at zstty? # keyboard" 134.Cd "ms0 at zstty? # mouse" 135.Ss sun3 136.Cd "zstty0 at zsc1 channel 0 # ttya" 137.Cd "zstty1 at zsc1 channel 1 # ttyb" 138.Cd "kbd0 at zsc0 channel 0 # keyboard" 139.Cd "ms0 at zsc0 channel 1 # mouse" 140.Ss x68k 141.Cd "zsc0 at intio0 addr 0xe98000 intr 112" 142.Cd "zstty0 at zsc0 channel 0 # built-in RS-232C" 143.Cd "ms0 at zsc0 channel 1 # standard mouse" 144.Cd "#zsc1 at intio0 addr 0xeafc00 intr 113" 145.Cd "#zstty2 at zsc1 channel 0" 146.Cd "#zstty3 at zsc1 channel 1" 147.Cd "#zsc2 at intio0 addr 0xeafc10 intr 114" 148.Cd "#zstty4 at zsc2 channel 0" 149.Cd "#zstty5 at zsc2 channel 1" 150.Sh DESCRIPTION 151The 152.Nm 153driver provides TTY support for Zilog 8530 Dual UART chips. 154.Pp 155Input and output for each line may set to any baud rate in the 156range 50 to 38400 (and higher on some machines). 157.Pp 158The 159.Em PPS_SYNC 160option enables code to use the Data Carrier Detect (DCD) signal line for attachment 161to an external precision clock source (e.g., GPS, CDMA) 162which generates a Pulse Per Second (PPS) signal. 163This is used by 164.Xr ntpd 8 165to discipline the system clock, and more accurately count/measure time. 166See 167.Xr options 4 168for more discussion. 169.Sh FILES 170.Ss alpha 171.Bl -tag -width Pa 172.It Pa /dev/ttyB0 173.It Pa /dev/ttyB1 174.El 175.Ss pmax 176.Bl -tag -width Pa 177.It Pa /dev/ttya 178.It Pa /dev/ttyb 179.It Pa /dev/ttyc 180.It Pa /dev/ttyd 181.El 182.Ss sparc 183.Bl -tag -width Pa 184.It Pa /dev/ttya 185.It Pa /dev/ttyb 186.It Pa /dev/ttyc 187.It Pa /dev/ttyd 188.El 189.Ss sparc64, sun2, sun3 190.Bl -tag -width Pa 191.It Pa /dev/ttya 192.It Pa /dev/ttyb 193.El 194.Ss others 195.Bl -tag -width Pa 196.It Pa /dev/ttyZ0 197.It Pa /dev/ttyZ1 198.El 199.Sh DIAGNOSTICS 200.Bl -tag -width indent 201.It zs0*: fifo overflow 202.br 203The on-chip 204.Dq FIFO 205has overflowed and incoming data has been lost. 206This generally means the machine is not responding to 207interrupts from the ZS chip fast enough, which can be 208remedied only by using a lower baud rate. 209.It zs0*: ring overflow 210.br 211The software input 212.Qq ring 213has overflowed. 214This usually means input flow-control is not configured correctly 215.Pq i.e. incorrect cable wiring . 216.El 217.Sh SEE ALSO 218.Xr kbd 4 , 219.Xr ms 4 , 220.Xr options 4 , 221.Xr tty 4 , 222.Xr ntpd 8 223.Sh HISTORY 224The 225.Nm 226driver was derived from the 227.Nm sparc 228.Nm zs 229driver supplied with 230.Bx 4.4 231.Ux . 232.Sh CAVEATS 233.Pa /dev/ttyB1 234on alpha is created by 235.Xr MAKEDEV 8 236with minor number 2, so the corresponding device should be zstty2, not zstty1. 237.Sh BUGS 238The old Zilog 8530 chip has a very small FIFO (3 bytes?) and 239therefore has very strict latency requirements for the 240interrupt service routine. 241This limits the usable baud rates on many machines. 242