Clock Real-time clock module

CC3GO System startup process

W - W7 Window device drivers W, WI, W2, W3, W4,

W5, W6, W7

OS-9 stores the modules loaded during the system startup with

a minimum of fragmentation. To include additional modules, cre

ate new bootstrap files using the OS9GEN command or the

CONFIG program supplied with OS-9. You cannot unlink a mod

ule loaded as part of the bootstrap.

After booting, when the system switches the boot block into its

own address space, any non-system files included in the boot

strap decrease the memory available in the system mode. It is

best to place optional modules in a separate file and load them

as part of the system startup procedure. One example is the

shell. Never include the shell as part of a system boot file in

OS-9 Level Two systems.

Errmsg is the error message file.

Stdfonts contains the standard software fonts for use on

graphic windows.

STDPatterns contains screen background and fill

patterns.

STDPtrs contains graphic pointer images for use with a

mouse.

These files, and the SYS directory itself, are not required to boot

OS-9, but you do need them if you plan to use the ERROR com

mand, or if you intend to use text, or mouse pointers on graphic

windows. You can also add other system-wide files of a similar

nature.

Useful System Information and Functions / 5

The Startup file (/DO/startup) is a shell procedure file that OS-9

automatically processes as part of the system boot. You can

include any legal shell command line in the Startup file. Many

people include SETIME to start the system clock. If this file is

not present, the system starts correctly, but the system time is

not accurate.

The directory /DO/CMDS is the system-wide command directory

normally shared by all users as their working execution direc

tory. The shell resides in the CMDS directory. The system start

up process CC3go makes CMDS the initial execution directory.

You can add your own programs to the CMDS directory and have

them execute in the same manner as the original system

commands.

Getting Started With OS-9 told you how to create new system

diskettes using the CONFIG utility. There are other ways to cre

ate system diskettes and either add or subtract capabilities. The

following information provides guidelines on how to do this. For

more detailed instructions see the descriptions of the CONFIG,

OS9GEN, and COBBLER commands in this manual.

Before starting any of the following procedures, you need a

blank, formatted diskette on which to place your system files.

Then, choose one of the following methods to update your

system:

Use the OS9GEN command to add modules to the exist

ing OS9Boot file.

Use CONFIG to select the modules you want to include

in the OS9Boot file.

If you choose to use CONFIG, the utility creates a complete sys

tem during the process. If you use OS9GEN, follow these steps:

1. Create the OS9Boot file using OS9GEN.

2. Create or copy the Startup file.

3. Copy the CMDS and SYS directories and the files they

contain.

You can perform these steps manually or do them automatically

by using one of these methods:

Creating and using a shell procedure file

Using a shell procedure file generated by DSAVE

or

Using BACKUP

You can operate the RS-232 port or the printer at all standard

baud rates from 110 baud to 19200 baud. (The default rate is

600 baud.) The default format used is 8 data bits, no parity, and

1 stop bit.

Use the XMODE command to set the port's baud rate, parity,

word length, stop bits, end-of-line delay, auto line feed, and so

forth. To examine the printer's current settings, type:

xmode /P ENTER

Then, if you want to make changes, use XMODE with informa

tion from the following chart. Select the parameter you want

from the left column of each chart, and then select the corre

sponding number from the "Value to Use" column and write it

down. After you select the proper value from each chart, add

them together to obtain a final value for XMODE. All values

must be hexadecimal.

Useful System Information and Functions / 5

For instance, to set the printer parameters to one stop bit, a

word length of seven bits, and a baud rate of 600, select 0 from

the Stop Bits chart, 20 from the Word Length chart, and 2 from

the Baud Rate chart. Add the values together:

0 + 20 + 2 = 22

xmode /p baud=22 ENTER

When you use XMODE to set baud, parity, and stop bit values,

you are actually setting the bits of a special byte to certain val

ues. OS-9 uses these values to determine how to handle subse

quent input/output operations. A bit is a binary digit and can be

either 1 or 0. A byte consists of eight bits and can represent a

value between 0 and 255.

The following chart shows the bits that control baud rate, word

length, and stop bits for input/output operations on a specified

device.

Bit 7 6 5 4 3 2 1 0

If the stop bit value = 0, stop bits = 1

If the stop bit value = 1, stop bits = 2

If the word length value = 00, word length = 8 bits

If the word length value = 01, word length = 7 bits

If the baud rate value = 0, baud rate = 110

If the baud rate value = 1, baud rate = 300

If the baud rate value = 2, baud rate = 600

If the baud rate value = 3, baud rate = 1200

If the baud rate value = 4, baud rate = 2400

If the baud rate value = 5, baud rate = 4800

If the baud rate value = 6, baud rate = 9600

If the baud rate value = 7, baud rate = 19200

(/t2 ACIAPAK only)

If the baud rate value = 8, baud rate = 32000

Utl SIO only)

Parity MDM Kill Not Ready Delay

i i

i i

i i

i

If the MDM kill switch value is 0, then DCD loss = no kill

If the MDM kill switch value is 1, then DCD loss = kill

The value of the not ready delay bits equals the number of

seconds delay.

For more information on setting other parameters, such as the

end-of-line delay (null count), see the XMODE command refer

ence in Chapter 6.