.th MSBOOT VIII 3/13/78 .sh NAME msboot \*- boot from msc 1100 controller .sh FUNCTION The \fImsboot\fR bootstrap program is used for booting UNIX systems from Ampex DM9100 drives with a Microcomputer Systems controller. It will boot the file `/unix' from a file system at a selectable cylinder offset. .sh OPERATION Start the DEC M9301-YC hardware bootstrap by .br .in +7 .nf .ul SW CONTENTS OPERATION 165000 Load address 000040 Start .sp .fi .in -7 The bootstrap program will be loaded and will commence running. It will wait until the value in the switch register is changed before continuing. If the value is increased, for example to 52 or 173030, then a default file system, currently at cylinder 0326, will be searched for the file 'unix' and it will be loaded and executed. .s3 A decreased value, for example 0, will cause a `?' to be typed on the console terminal, which can then be used to type in an alternative program for booting. The name should be given as a pathname starting from the root directory of the file system being booted. Before typing return put the cylinder number of the file system in the switch register. Now place a suitable value in the switch register (52 or 173030) and hit return again. A further `?' indicates that the name could not be found and the procedure should be repeated. .sh FILES /usr/source/mdec/msboot.s bootstrap program /usr/mdec/msboot likewise but assembled .sh BUGS none