HP Deskjet 9800 User manual

HP 9800 Computers
98750 CE Handbook
Part No. 98750-90039
E0982
Requires Binder No. 9282-0683
Flin- HEWLETT
a:~ PACKARD
Printed in US.A
First Edition, September 1982

98750 CE Handbook
© Copyright Hewlett-Packard Company, 1982
This document refers to proprietary computer software which is protected by copyright
All rights are reserved. Copying orotherreproduction ofthis programexcept for archival
purposes is prohibited without the prior written consent
01 Hewlett-Packard Company
Hewlett-Packard Company
3404 East Harmony Road, Fort Collins, Colorado 80525

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98750 Product Information 1-1
Chapter 1
Product Information
CRT Display Specifications
Screen Size:
Refresh Rate:
CRT Phosphor:
Alpha Raster:
Character Size:
Screen Capacity:
Graphics Raster:
261 mm x
193 mm (10.3 x 7.6 inches)
60Hz
P31
236 mm x 123 mm (9.3 x 4.84 inches)
2.3 mm x 2.95 mm (.09 x .116 inches)
24 lines of 80 characters
200 mm x 162.5 mm (7.9 x 6.4 inches)
Options and Configurations
The 98750A is available as an integral part of the 9845B #lxx. See the 9845B Base CE
Handbook Chapter for option information.
09845-92030
09845-93050
09845-92005
Related Documentation
Service Manual
Monochromatic Graphics Programming Manual
Owner's and System Exerciser Manual
Product Support Package
The 98750A service tools are included in the 9845B Product Support Package. Refer to the
9845B CE Handbook Chapter.
Safety
WARNING
LETHAL VOLTAGES ARE PRESENT INSIDE THE 98750A. RE-
FER TO THE GENERAL SAFETY GUIDELINES IN THE 98458
SERVICE MANUAL.

1-2 98750 Product Information

98750 Environmental/Installation/PM 2-1
Chapter 2
Environmental/Installation!
Preventive Maintenance
Installation
After unpacking the computer, the CRT assembly must be mounted onto the mainframe
assembly. The CRT assembly
will lock into place on top of the mainframe support legs. It is
important that the gUides on the CRT assembly and the mainframe support legs are aligned
properly before assembly. Figure 2-1 shows the proper alignment necessary for
the CRT
assembly installation. Notice how the buttons on bottom of the CRT assembly align with the
notches in the support legs.
Figure 2-1. CRT Assembly Installation

2-2 98750 Environmentalilnstallation/PM
Preventive Maintenance
Clean the case parts and tube face occasionally with mild soap and water or alcohol. Do not use
harsh, abrasive,
or other general purpose cleaners.

Base Configuration
98750 Configuration 3-1
Chapter 3
Configuration
The following assemblies must be installed in the 9845B base to support the98750A.
09845-65517
1818-0831
and 1818-0835
09845-66503
Graphics ROM
Mainframe ROM for Graphics ROM
Mainframe ROM for Graphics ROM
Alpha Control Assembly
Refer tothe 9845BBase CE Handbook Chapter for the locations of these parts.
Interfacing
The 98750A interfaces to the 9845B base via the Alpha Control Assembly (09845-66503) and
the Graphics Interface Assembly (09845-66504). Alpha information is stored in block 0 read-
write memory, and
is refreshed to the display via the IDA bus. Graphics information is transfer-
red via the 110 bus to the display, where it is interpreted and entered into the display memory.

3-2 98750 Configuration
Status Word
The Status Word may be obtained by executing the following instructions:
STATUS 13 iA
DISP A
The result is a decimal integer which may be converted to binary and interpreted as shown
below.
4 o
1101011101010010
LID Bit
'-------1/0 Status Bit