Annotation of www/vax-simh.html, Revision 1.31
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13: <p>
14:
15: <h2><font color="#e00000">OpenBSD/vax on SIMH</font></h2>
16:
17: <hr>
18:
19: It is very easy to install OpenBSD/vax on the
1.2 henning 20: <a href="http://simh.trailing-edge.com">SIMH</a> VAX simulator. All
1.1 kettenis 21: you need is a reasonably fast machine, enough disk space for a 1.5GB
1.28 sthen 22: disk image and the vax <i>floppy53.fs</i> file.
1.1 kettenis 23:
24: Assuming you're going to run SIMH on an OpenBSD system, install the
1.18 steven 25: <i>emulators/simh</i> package from <a href="faq/ports/index.html">ports</a>.
1.1 kettenis 26: Decide on an appropriate location for your OpenBSD/vax SIMH
27: environment and at that location, create a file <i>openbsd.simh</i>
28: with the following contents:
29:
1.3 saad 30: <blockquote>
31: <pre>
1.1 kettenis 32: <strong>
1.24 okan 33: set cpu 128m
1.1 kettenis 34: at nvr openbsd.nvram
35:
1.8 kettenis 36: deposit rq qtime 1000000
1.1 kettenis 37:
38: set rq0 ra92
39: at rq0 openbsd.ra0.disk
40:
41: set rq1 cdrom
42: at rq1 /dev/rcd0c
43:
44: set rq2 cdrom
1.28 sthen 45: at rq2 floppy53.fs
1.1 kettenis 46:
1.26 sthen 47: at xq0 tap:tun0
1.1 kettenis 48:
49: boot cpu
50: exit
51: </strong>
1.3 saad 52: </pre>
53: </blockquote>
1.1 kettenis 54:
1.24 okan 55: This configures SIMH to simulate a VAX with a whopping 128 MB of
1.1 kettenis 56: memory, a RA92 1.5GB disk, a CD-ROM unit to hold CD1 of your CD-ROM
57: set, another CD-ROM unit to boot from, and a DELQA Qbus Ethernet
1.26 sthen 58: controller attached to the tun0 interface.
59: You might need to replace <strong>/dev/rcd0c</strong> with the
60: name of the raw device corresponding to your real CD-ROM unit.
1.21 sthen 61:
62: <p>
63:
64: By default pressing ^E will interrupt the emulation; if you're
65: accustomed to the emacs editing keys, you might like to remap this
66: (e.g. adding <strong>set console wru=1e</strong> sets it to ^6,
67: ascii code 0x1e).
68: If you prefer a larger disk, replace <strong>set rq0 ra92</strong>
69: with e.g. <strong>set rq0 rauser=15000</strong> (where 15000 is the
1.22 sthen 70: size in MB).
1.21 sthen 71: See the SIMH documentation for more details.
1.1 kettenis 72:
73: <p>
74:
1.26 sthen 75: Before starting SIMH, you will need to configure the network.
1.27 sthen 76: In most cases, the following bridge-based configuration will give
77: best results:
78:
79: <p>
80:
1.29 sthen 81: Create the tun0 network interface, set it into layer 2 mode and bring it up:
1.26 sthen 82:
83: <blockquote>
84: <pre>
85: # <strong>ifconfig tun0 create</strong>
86: # <strong>ifconfig tun0 link0</strong>
1.29 sthen 87: # <strong>ifconfig tun0 up</strong>
1.26 sthen 88: </pre>
89: </blockquote>
90:
91: Bridge it to your ethernet interface and enable the bridge:
92:
93: <blockquote>
94: <pre>
95: # <strong>ifconfig bridge0 create</strong>
96: # <strong>ifconfig bridge0 fwddelay 4</strong>
97: # <strong>ifconfig bridge0 add em0 add tun0</strong>
98: # <strong>ifconfig bridge0 up</strong>
99: </pre>
100: </blockquote>
101:
1.27 sthen 102: By setting appropriate permissions on /dev/tun0 you can avoid running
103: SIMH as root.
104:
105: <p>
106:
107: Alternatively, if you cannot use bridge(4) (for example with some
108: wireless drivers), you can use BPF to connect to the network.
109: In this case, you can skip the above <tt>ifconfig</tt> lines and
110: replace the "<tt>at xq0 tap:tun0</tt>" line with a line like this,
111: replacing iwn0 with your actual network interface as necessary:
112:
113: <blockquote><pre>
114: <strong>at xq0 iwn0</strong>
115: </pre></blockquote>
116:
1.26 sthen 117: <p>
118:
1.28 sthen 119: Copy <i>vax/floppy53.fs</i> to the location of your
1.12 miod 120: OpenBSD/vax SIMH environment.
1.1 kettenis 121:
122: Now fire up SIMH. At the boot prompt you should type <strong>boot
123: dua2:</strong>, after which SIMH should boot into the normal OpenBSD
124: installation program:
125:
1.3 saad 126: <blockquote>
127: <pre>
1.1 kettenis 128: # <strong>simh-vax openbsd.simh</strong>
129:
1.25 sthen 130: VAX simulator V3.9-0
1.1 kettenis 131: NVR: buffering file in memory
1.26 sthen 132: Eth: opened OS device tun0
1.13 sthen 133: Loading boot code from /usr/local/lib/simh/vax/ka655x.bin
1.1 kettenis 134:
135:
136: KA655-B V5.3, VMB 2.7
137: Performing normal system tests.
138: 40..39..38..37..36..35..34..33..32..31..30..29..28..27..26..25..
139: 24..23..22..21..20..19..18..17..16..15..14..13..12..11..10..09..
140: 08..07..06..05..04..03..
141: Tests completed.
142: >>><strong>boot dua2:</strong>
143: (BOOT/R5:0 DUA2
144:
145:
146:
147: 2..
148: -DUA2
149: 1..0..
150:
151:
1.25 sthen 152: >> OpenBSD/vax boot [1.16] <<
1.1 kettenis 153: >> Press enter to autoboot now, or any other key to abort: 0
154: > boot bsd
1.3 saad 155: </pre>
156: </blockquote>
1.1 kettenis 157:
158: After you've finished the installation, restart SIMH, but now type:
159:
1.3 saad 160: <blockquote>
161: <pre>
1.1 kettenis 162: >>><strong>boot dua0:</strong>
1.3 saad 163: </pre>
164: </blockquote>
1.1 kettenis 165:
166: to boot from your newly installed disk image. You'll need a little
167: patience upon your first boot, since generating the SSH host keys can
168: take quite a bit of time. But it will eventually boot through and
169: present you with a friendly login prompt:
170:
1.3 saad 171: <blockquote>
172: <pre>
1.1 kettenis 173: OpenBSD/vax (noname.my.domain) (console)
174:
175: login:
1.3 saad 176: </pre>
177: </blockquote>
1.1 kettenis 178:
179: When you are done installing any additional packages, you might want
180: to remove the lines referring to your real CD-ROM unit and
1.28 sthen 181: <i>floppy53.fs</i> from your <i>openbsd.simh</i> file.
1.1 kettenis 182:
183: <p>
184:
185: Enjoy!
186:
187: </body>
188: </html>
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