1dnl $OpenBSD: prep,v 1.8 2014/04/22 22:58:02 aoyama Exp $ 2dnl Need to provide a short monitor description. Start from 3dnl http://www.nk-home.net/~aoyama/luna88k/monitor.txt 4dnl and also document NVRAM? 5 6LUNA-88K do not require any specific preparation prior to the OpenBSD 7installation. However, you might want to get familiar with the PROM 8interface, in order to be able to boot the installation media and, later, 9specify the correct boot parameters. 10 11Setting up the boot device and filename: 12 13 Boot device and filename information is stored by the PROM into 14 the machine's non-volatile memory. 15 16 LUNA-88K systems can only boot from SCSI devices. The boot device type 17 (such as ``sd'' for a disk) is specified by the 18 ``boot_device'' variable. The SCSI id of the boot device is specified 19 by the ``boot_unit'' NVRAM variable, and the boot partition on said 20 device is specified by the ``boot_partition'' variable. The 21 ``boot_filename'' variable stores the name of the file to boot, and 22 defaults to ``vmunix''. To boot OpenBSD, this variable should be 23 changed to ``boot'', as in: 24 25 0> nvram boot_filename boot 26 27 The ``boot_unit'' value is an encoding of the device SCSI identifier. 28 If the boot device is an SCSI disk (``sd''), the value of ``boot_unit'' 29 should be (6 - ID). On LUNA-88K2 systems, if the boot device is connected 30 to the external SCSI connector, 10 should be added to the value of 31 ``boot_unit''. Thus booting off an external SCSI disk of ID #0 would 32 be 16 on a LUNA-88K2, and 6 on a LUNA-88K. 33 34Setting up the boot behaviour: 35 36 Unlike other platforms, boot behaviour is controlled by the front panel 37 DIP switches only. 38 39 The first set of DIP switches in the front panel (DIP SW1) is used to 40 select the machine behaviour upon powerup, as well as the preferred 41 console device. 42 43 The meaning of these switches will depend upon your particular machine. 44 On the LUNA-88K, the 'down' position is 'on', and the 'up' position is 45 'off', while the LUNA-88K2 uses the opposite convention (i.e. 'up' is 46 'on' and 'down' is 'off'). 47 48 If the leftmost switch in SW1, #1, is in the 'off' position, the system 49 will auto-boot from the boot device saved in NVRAM (using the 50 ``boot_device'', ``boot_unit'' and ``boot_filename'' variables). Otherwise, 51 the boot process will stop at the PROM prompt. 52 53Setting up serial console: 54 55 The second switch in SW1, #2, selects the console device. When in the 'on' 56 position, it selects the serial console port as the console; otherwise, 57 the graphics display and keyboard are used as the console. 58 59 While the LUNA-88K2 uses ``standard'' DB9 serial ports, the earlier 60 LUNA-88K have a specific connector, HiRose QM10-14R(L)-PR. Wiring 61 information for this connector can be found at the following URL: 62 http://www.kk.iij4u.or.jp/~taokamur/luna68k/serial.jpg 63 A suitable cable connector for this port would be either HiRose 64 QM30-14PA-EP with a QM14-CS cover (with lock), or QM30-14P-EP with a 65 QM14-CY cover (without lock). 66 67
