Annotation of www/vax-simh.html, Revision 1.33
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14: <p>
15:
16: <h2><font color="#e00000">OpenBSD/vax on SIMH</font></h2>
17:
18: <hr>
19:
20: It is very easy to install OpenBSD/vax on the
1.2 henning 21: <a href="http://simh.trailing-edge.com">SIMH</a> VAX simulator. All
1.1 kettenis 22: you need is a reasonably fast machine, enough disk space for a 1.5GB
1.32 sthen 23: disk image and a <i>floppyXX.fs</i> file from the OpenBSD/VAX distribution.
1.1 kettenis 24:
25: Assuming you're going to run SIMH on an OpenBSD system, install the
1.18 steven 26: <i>emulators/simh</i> package from <a href="faq/ports/index.html">ports</a>.
1.1 kettenis 27: Decide on an appropriate location for your OpenBSD/vax SIMH
28: environment and at that location, create a file <i>openbsd.simh</i>
29: with the following contents:
30:
1.3 saad 31: <blockquote>
32: <pre>
1.1 kettenis 33: <strong>
1.24 okan 34: set cpu 128m
1.1 kettenis 35: at nvr openbsd.nvram
36:
1.8 kettenis 37: deposit rq qtime 1000000
1.1 kettenis 38:
39: set rq0 ra92
40: at rq0 openbsd.ra0.disk
41:
42: set rq1 cdrom
43: at rq1 /dev/rcd0c
44:
45: set rq2 cdrom
1.32 sthen 46: at rq2 floppy58.fs
1.1 kettenis 47:
1.26 sthen 48: at xq0 tap:tun0
1.1 kettenis 49:
50: boot cpu
51: exit
52: </strong>
1.3 saad 53: </pre>
54: </blockquote>
1.1 kettenis 55:
1.32 sthen 56: For OpenBSD >5.8, replace "at xq0 tap:tun0" with "at xq0 tap:tap0".<p>
57:
1.24 okan 58: This configures SIMH to simulate a VAX with a whopping 128 MB of
1.1 kettenis 59: memory, a RA92 1.5GB disk, a CD-ROM unit to hold CD1 of your CD-ROM
60: set, another CD-ROM unit to boot from, and a DELQA Qbus Ethernet
1.26 sthen 61: controller attached to the tun0 interface.
62: You might need to replace <strong>/dev/rcd0c</strong> with the
63: name of the raw device corresponding to your real CD-ROM unit.
1.21 sthen 64:
65: <p>
66:
67: By default pressing ^E will interrupt the emulation; if you're
68: accustomed to the emacs editing keys, you might like to remap this
69: (e.g. adding <strong>set console wru=1e</strong> sets it to ^6,
70: ascii code 0x1e).
71: If you prefer a larger disk, replace <strong>set rq0 ra92</strong>
72: with e.g. <strong>set rq0 rauser=15000</strong> (where 15000 is the
1.22 sthen 73: size in MB).
1.21 sthen 74: See the SIMH documentation for more details.
1.1 kettenis 75:
76: <p>
77:
1.26 sthen 78: Before starting SIMH, you will need to configure the network.
1.27 sthen 79: In most cases, the following bridge-based configuration will give
80: best results:
81:
82: <p>
83:
1.32 sthen 84: Create the network interface, set it into layer 2 mode if necessary,
85: and bring it up:
1.26 sthen 86:
87: <blockquote>
88: <pre>
1.32 sthen 89: # OpenBSD <=5.8
1.26 sthen 90: # <strong>ifconfig tun0 create</strong>
91: # <strong>ifconfig tun0 link0</strong>
1.29 sthen 92: # <strong>ifconfig tun0 up</strong>
1.32 sthen 93:
94: # OpenBSD >5.8
95: # <strong>ifconfig tap0 create</strong>
96: # <strong>ifconfig tap0 up</strong>
1.26 sthen 97: </pre>
98: </blockquote>
99:
100: Bridge it to your ethernet interface and enable the bridge:
101:
102: <blockquote>
103: <pre>
1.32 sthen 104: # OpenBSD <=5.8
1.26 sthen 105: # <strong>ifconfig bridge0 create</strong>
106: # <strong>ifconfig bridge0 fwddelay 4</strong>
107: # <strong>ifconfig bridge0 add em0 add tun0</strong>
108: # <strong>ifconfig bridge0 up</strong>
1.32 sthen 109:
110: # OpenBSD >5.8
111: # <strong>ifconfig bridge0 create</strong>
112: # <strong>ifconfig bridge0 fwddelay 4</strong>
113: # <strong>ifconfig bridge0 add em0 add tap0</strong>
114: # <strong>ifconfig bridge0 up</strong>
1.26 sthen 115: </pre>
116: </blockquote>
117:
1.32 sthen 118: By setting appropriate permissions on /dev/tun0 or /dev/tap0 you can
119: avoid running SIMH as root.
1.27 sthen 120:
121: <p>
122:
1.32 sthen 123: 802.11 wireless interfaces cannot use bridge(4) without WDS support;
124: in this case you can use BPF to connect to the network.
125: Skip the above <tt>ifconfig</tt> lines and replace the
126: "<tt>at xq0 tap:tun0</tt>" or "<tt>at xq0 tap:tap0</tt>" line with
127: a line like this, replacing iwn0 with your actual network interface
128: as necessary:
1.27 sthen 129:
130: <blockquote><pre>
131: <strong>at xq0 iwn0</strong>
132: </pre></blockquote>
133:
1.26 sthen 134: <p>
135:
1.32 sthen 136: Copy the relevant <i>vax/floppyXX.fs</i> file to the location of your
1.12 miod 137: OpenBSD/vax SIMH environment.
1.1 kettenis 138:
139: Now fire up SIMH. At the boot prompt you should type <strong>boot
140: dua2:</strong>, after which SIMH should boot into the normal OpenBSD
141: installation program:
142:
1.3 saad 143: <blockquote>
144: <pre>
1.1 kettenis 145: # <strong>simh-vax openbsd.simh</strong>
146:
1.25 sthen 147: VAX simulator V3.9-0
1.1 kettenis 148: NVR: buffering file in memory
1.26 sthen 149: Eth: opened OS device tun0
1.13 sthen 150: Loading boot code from /usr/local/lib/simh/vax/ka655x.bin
1.1 kettenis 151:
152:
153: KA655-B V5.3, VMB 2.7
154: Performing normal system tests.
155: 40..39..38..37..36..35..34..33..32..31..30..29..28..27..26..25..
156: 24..23..22..21..20..19..18..17..16..15..14..13..12..11..10..09..
157: 08..07..06..05..04..03..
158: Tests completed.
159: >>><strong>boot dua2:</strong>
160: (BOOT/R5:0 DUA2
161:
162:
163:
164: 2..
165: -DUA2
166: 1..0..
167:
168:
1.25 sthen 169: >> OpenBSD/vax boot [1.16] <<
1.1 kettenis 170: >> Press enter to autoboot now, or any other key to abort: 0
171: > boot bsd
1.3 saad 172: </pre>
173: </blockquote>
1.1 kettenis 174:
175: After you've finished the installation, restart SIMH, but now type:
176:
1.3 saad 177: <blockquote>
178: <pre>
1.1 kettenis 179: >>><strong>boot dua0:</strong>
1.3 saad 180: </pre>
181: </blockquote>
1.1 kettenis 182:
183: to boot from your newly installed disk image. You'll need a little
184: patience upon your first boot, since generating the SSH host keys can
185: take quite a bit of time. But it will eventually boot through and
186: present you with a friendly login prompt:
187:
1.3 saad 188: <blockquote>
189: <pre>
1.1 kettenis 190: OpenBSD/vax (noname.my.domain) (console)
191:
192: login:
1.3 saad 193: </pre>
194: </blockquote>
1.1 kettenis 195:
196: When you are done installing any additional packages, you might want
197: to remove the lines referring to your real CD-ROM unit and
1.32 sthen 198: <i>floppyXX.fs</i> from your <i>openbsd.simh</i> file.
1.1 kettenis 199:
200: <p>
201:
202: Enjoy!
203:
204: </body>
205: </html>
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