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I
CHAPTER ZERO
Bootstrap
This procedure establishes communication between your H89 computer and
your disk drive.
It
is called "b.ooting" the operating system (HDOS) to get it
started. When you "boot up", the ROM bootstrap program (located on the CPU
board) will examine your HB 9' s memory to find out how much is installed.
It
will
then load the HDOS monitor into the upper
2.4K
of the memory area. When this
is accomplished, control will be passed from the ROM bootstrap program to the
monitor. The monitor will then take control.
The following instructions tell you how to accomplish this process of "booting
up" the system. Before starting it, you should have performed the "Power-Up"
procedure above.
The "Type Spaces to Determine Baud Rate" prompt appears from the HDOS
monitor.
It
is now ready to access the diskette, and must know the console baud
rate. Usually, this takes
3-4
strikings of the space bar, but can vary. The variation
is dependent both on baud rate and how fast you strike the space bar.
Once HDOS has determined the baud rate at ,which your terminal is set, it will
resume with the normal "BOOT" routine. (Note: the number of spaces HDOS
requires to determine your baud rate will vary.) When the baud-rate is deter-
mined, HDOS will prompt on the system console with:
ACTION? <boot>
If this does not take place, repeat this procedure, making sure you are using the
system (distribution) diskette and that you have correctly installed the disk
controller board and interconnecting cable. If you have the system properly
configured and it still does not "boot up" correctly, refer to the troubleshooting
guide in your H89 Operations Manual.
At this point, you can take any one of three options. First, if you strike any key
except "C" ,"B", or Carriage Return, a "help" listing will be printed, as follows:
ACTION? <boot> HELP
LEGAL COMMANDS
BOOT
- BOOT HDOS
CHECK - SECTOR CHECKSUMS
HELP
- PRINT THIS LIST
ACTION? <boot>
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