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32 .Nd introduction to special files and hardware support
34 This section describes the special files, related driver functions,
35 and networking support available in the system.
36 In this part of the manual, the
38 section of each configurable device gives a sample specification
39 for use in constructing a system description for the
44 section lists messages which may appear on the console
45 and/or in the system error log
47 due to errors in device operation; see
51 This section contains both devices which may be configured into
52 the system and network related information.
53 The networking support is introduced in
56 This section describes the hardware supported by
58 Software support for these devices comes in two forms.
59 A hardware device may be supported with a character or block
61 or it may be used within the networking subsystem and have a
62 .Em network interface driver .
63 Block and character devices are accessed through files in the file
64 system of a special type; see
66 Network interfaces are indirectly accessed through the interprocess
67 communication facilities provided by the system; see
70 A hardware device is identified to the system at configuration time
71 and the appropriate device or network interface driver is then
72 compiled into the system.
73 When the resultant system is booted, the autoconfiguration facilities
74 in the system probe for the device and, if found, enable the software
76 If a device does not respond at autoconfiguration time it is not
77 accessible at any time afterwards.
78 To enable a device which did not autoconfigure, the
79 system must be rebooted.
81 The autoconfiguration system is described in
83 A list of the supported devices is given below.
89 supports a variety of systems conforming to the ARC machine
91 The following systems are supported:
93 .Bl -tag -width XXXXXX -offset indent -compact
98 .It NEC Express 5800/230 PCI R4K
99 .It NEC Express 5800/240 EISA R4K
100 .It NEC Express RISCserver
101 .It NEC ImageRISCstation
102 .It NEC RISCserver 2200
103 .It NEC RISCstation 2200 EISA
104 .It NEC RISCstation 2200 PCI
105 .It NEC RISCstation 2250
108 The devices listed below are supported in this incarnation of the
110 Devices are indicated by their functional interface.
111 Not all supported devices are listed.
113 .Bl -tag -width jazzisabr -offset indent -compact
115 DESKstation rPC44 ISA host bridge
117 Jazz internal bus host bridge
119 Jazz ISA/EISA bus bridge
121 NEC RISCstation PCI host bridge
123 DESKstation Tyne ISA host bridge
126 The following devices on the Jazz internal bus are supported.
128 .Bl -tag -width mcclock -offset indent -compact
130 NCR 53c9x-based SCSI interface
132 NS16550-based serial communications interface
134 Floppy disk controller
138 DS1287 real-time clock
140 Symbios/NCR 53c700-based SCSI interface
142 Symbios/NCR 53c710-based SCSI interface
144 PC keyboard controller
153 PCI devices are supported through the
155 bus and associated device drivers.
157 ISA devices are supported through the
159 bus and associated device drivers.
161 .\"EISA devices are supported through the
163 .\"bus and associated device drivers.
165 Console devices using ISA, Jazzio, or PCI video adaptors and standard AT
166 or PS/2 keyboards are supported by the machine independent
169 .Sh UNSUPPORTED DEVICES
170 The following devices are not supported, due to unavailability of
171 either documentation or sample hardware:
173 .Bl -tag -width XXXXXX -offset indent -compact
174 .It AD1848 audio on Jazzio
176 .It VXL framebuffer on MIPS Magnum and RISCstation 2200 EISA
185 DESKstation rPC44 and Tyne support is currently broken.