Annotation of www/vax-simh.html, Revision 1.29
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18:
19: <h2><font color="#e00000">OpenBSD/vax on SIMH</font></h2>
20:
21: <hr>
22:
23: It is very easy to install OpenBSD/vax on the
1.2 henning 24: <a href="http://simh.trailing-edge.com">SIMH</a> VAX simulator. All
1.1 kettenis 25: you need is a reasonably fast machine, enough disk space for a 1.5GB
1.28 sthen 26: disk image and the vax <i>floppy53.fs</i> file.
1.1 kettenis 27:
28: Assuming you're going to run SIMH on an OpenBSD system, install the
1.18 steven 29: <i>emulators/simh</i> package from <a href="faq/ports/index.html">ports</a>.
1.1 kettenis 30: Decide on an appropriate location for your OpenBSD/vax SIMH
31: environment and at that location, create a file <i>openbsd.simh</i>
32: with the following contents:
33:
1.3 saad 34: <blockquote>
35: <pre>
1.1 kettenis 36: <strong>
1.24 okan 37: set cpu 128m
1.1 kettenis 38: at nvr openbsd.nvram
39:
1.8 kettenis 40: deposit rq qtime 1000000
1.1 kettenis 41:
42: set rq0 ra92
43: at rq0 openbsd.ra0.disk
44:
45: set rq1 cdrom
46: at rq1 /dev/rcd0c
47:
48: set rq2 cdrom
1.28 sthen 49: at rq2 floppy53.fs
1.1 kettenis 50:
1.26 sthen 51: at xq0 tap:tun0
1.1 kettenis 52:
53: boot cpu
54: exit
55: </strong>
1.3 saad 56: </pre>
57: </blockquote>
1.1 kettenis 58:
1.24 okan 59: This configures SIMH to simulate a VAX with a whopping 128 MB of
1.1 kettenis 60: memory, a RA92 1.5GB disk, a CD-ROM unit to hold CD1 of your CD-ROM
61: set, another CD-ROM unit to boot from, and a DELQA Qbus Ethernet
1.26 sthen 62: controller attached to the tun0 interface.
63: You might need to replace <strong>/dev/rcd0c</strong> with the
64: name of the raw device corresponding to your real CD-ROM unit.
1.21 sthen 65:
66: <p>
67:
68: By default pressing ^E will interrupt the emulation; if you're
69: accustomed to the emacs editing keys, you might like to remap this
70: (e.g. adding <strong>set console wru=1e</strong> sets it to ^6,
71: ascii code 0x1e).
72: If you prefer a larger disk, replace <strong>set rq0 ra92</strong>
73: with e.g. <strong>set rq0 rauser=15000</strong> (where 15000 is the
1.22 sthen 74: size in MB).
1.21 sthen 75: See the SIMH documentation for more details.
1.1 kettenis 76:
77: <p>
78:
1.26 sthen 79: Before starting SIMH, you will need to configure the network.
1.27 sthen 80: In most cases, the following bridge-based configuration will give
81: best results:
82:
83: <p>
84:
1.29 ! sthen 85: Create the tun0 network interface, set it into layer 2 mode and bring it up:
1.26 sthen 86:
87: <blockquote>
88: <pre>
89: # <strong>ifconfig tun0 create</strong>
90: # <strong>ifconfig tun0 link0</strong>
1.29 ! sthen 91: # <strong>ifconfig tun0 up</strong>
1.26 sthen 92: </pre>
93: </blockquote>
94:
95: Bridge it to your ethernet interface and enable the bridge:
96:
97: <blockquote>
98: <pre>
99: # <strong>ifconfig bridge0 create</strong>
100: # <strong>ifconfig bridge0 fwddelay 4</strong>
101: # <strong>ifconfig bridge0 add em0 add tun0</strong>
102: # <strong>ifconfig bridge0 up</strong>
103: </pre>
104: </blockquote>
105:
1.27 sthen 106: By setting appropriate permissions on /dev/tun0 you can avoid running
107: SIMH as root.
108:
109: <p>
110:
111: Alternatively, if you cannot use bridge(4) (for example with some
112: wireless drivers), you can use BPF to connect to the network.
113: In this case, you can skip the above <tt>ifconfig</tt> lines and
114: replace the "<tt>at xq0 tap:tun0</tt>" line with a line like this,
115: replacing iwn0 with your actual network interface as necessary:
116:
117: <blockquote><pre>
118: <strong>at xq0 iwn0</strong>
119: </pre></blockquote>
120:
1.26 sthen 121: <p>
122:
1.28 sthen 123: Copy <i>vax/floppy53.fs</i> to the location of your
1.12 miod 124: OpenBSD/vax SIMH environment.
1.1 kettenis 125:
126: Now fire up SIMH. At the boot prompt you should type <strong>boot
127: dua2:</strong>, after which SIMH should boot into the normal OpenBSD
128: installation program:
129:
1.3 saad 130: <blockquote>
131: <pre>
1.1 kettenis 132: # <strong>simh-vax openbsd.simh</strong>
133:
1.25 sthen 134: VAX simulator V3.9-0
1.1 kettenis 135: NVR: buffering file in memory
1.26 sthen 136: Eth: opened OS device tun0
1.13 sthen 137: Loading boot code from /usr/local/lib/simh/vax/ka655x.bin
1.1 kettenis 138:
139:
140: KA655-B V5.3, VMB 2.7
141: Performing normal system tests.
142: 40..39..38..37..36..35..34..33..32..31..30..29..28..27..26..25..
143: 24..23..22..21..20..19..18..17..16..15..14..13..12..11..10..09..
144: 08..07..06..05..04..03..
145: Tests completed.
146: >>><strong>boot dua2:</strong>
147: (BOOT/R5:0 DUA2
148:
149:
150:
151: 2..
152: -DUA2
153: 1..0..
154:
155:
1.25 sthen 156: >> OpenBSD/vax boot [1.16] <<
1.1 kettenis 157: >> Press enter to autoboot now, or any other key to abort: 0
158: > boot bsd
1.3 saad 159: </pre>
160: </blockquote>
1.1 kettenis 161:
162: After you've finished the installation, restart SIMH, but now type:
163:
1.3 saad 164: <blockquote>
165: <pre>
1.1 kettenis 166: >>><strong>boot dua0:</strong>
1.3 saad 167: </pre>
168: </blockquote>
1.1 kettenis 169:
170: to boot from your newly installed disk image. You'll need a little
171: patience upon your first boot, since generating the SSH host keys can
172: take quite a bit of time. But it will eventually boot through and
173: present you with a friendly login prompt:
174:
1.3 saad 175: <blockquote>
176: <pre>
1.1 kettenis 177: OpenBSD/vax (noname.my.domain) (console)
178:
179: login:
1.3 saad 180: </pre>
181: </blockquote>
1.1 kettenis 182:
183: When you are done installing any additional packages, you might want
184: to remove the lines referring to your real CD-ROM unit and
1.28 sthen 185: <i>floppy53.fs</i> from your <i>openbsd.simh</i> file.
1.1 kettenis 186:
187: <p>
188:
189: Enjoy!
190:
191: <hr>
192: <a href="vax.html">
193: <img height="24" width="24" src="back.gif" border="0" alt="OpenBSD/vax">
194: </a>
195: <br>
196: <small><a href="mailto:www@openbsd.org">www@openbsd.org</a></small>
197: <br>
198:
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