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HP 13255

GRAPhICS DISPLAY MODULE
Manual part No. 13255-91126

REVISED
DEC-12-77




DATA TERMINAL
TECHNICAL INFORMATION




HEWLETT ir PACKARD



Printed in U.S.A.
13255 13255-91126/02
Graphics Display Module PEV DEC-12-77




1.0 INtRODUCTION.

The Graphics Display Module is used with the Graphics M-controller
MOdule, Top Plane connector and controller Connector Assemblies.
The Granhics Display Module contains the storage for the 2b4XX
Data Terminal graphics display 720 X 360 screen dot matrix.
The read-write memory is accessible throuah the Graphics M-Controll~r
and terminal bus for memory mOdification and test and through the
Display Controller Module for display. It is organized as a
16,384 X 16 bit word linear array.
The mOdule uses 16 lo-pin MOS RAMS each organized 16,384 X 1 bit.

t.l OPERATION.
The graohics display memory is read by the Graphics M-Controller during
the visible portion of the terminal video display, ~nd modified durina
the horizontal and vertical sweep retrace times.
The memory modification consists of modifying 1 bit at a time
and may oe a loqical operation with the current state, tnp
output of a serial pattern memory, or unconditionally set to
'1' '0' or to the same state as the serial pattern memory output.

The pattern memory output may be scaled so that the ratio between
the pattern memory bits and the memory bits may be chanoed from
1 to 16.

The display memory bits are displayed such that normally there
is a one-to-one correspondence between the memory and display
bits, automatic refresh is provided since every memory address
is read during one "frame".
In Zoom mOde the scaling Or zoom ratiO may be changed
from 1 to 16. Since the refresh is no longer automatic the
last display bit of each blOCK of repeated display bits
in the 'x' and '1' direction is blanked, thus providing time
for the memory refresh operation (durinq the 'X' blanked lines)
In addition, the 'window' resulting from Panninq while in Zoom mode
requires that the memory to be displayed on bit boundaries, the
necessary memory word presnifting is done prior to toe heginning of
each display line.
HP 13255

GRAPhICS DISPLAY MODULE
Manual part No. 13255-91126
R~VISED


DEC-l2-77




--------------------------------------------------------------------------------
NOTICE
The information contained in this document is subject to change
without notice.
HEW~ETT-PAC.~ARDMAKES NO wARRANTY Of ANY KIND WITH REGARD TO THIS
MATERIAL, TNCLUDING, BUT NOT LIMITED TO THE IMPLIED WARRANTIES OF
M~RCHANTAB!LITY AND FITNESS FOR A PARTICULAR PURPOSE. Hewlett-Packard
shall not be liable for errors contained herein or for incidental or
consequential damages in connection witn the furnisnlnq, performance,
or use of this material.
This document contains proprietary information which is protecte~ by
copyright. All rights are reserved. No part of this document may be
photocopied or reproduced without the prior written consent of he~lett
Packard Company.
--------------------------------------------------------------------------------
Copyright c 1977 by HEWLETT-PACKARD COMPANY


NOTE: This document is part Of the 264XX DATA TERMINAL product
series Technical InfOrmation Packaqe (HP 13255).
13255 13255-91126/02
Graphics Display MOdule PEV DEC-12-77




1.0 INTRODUCTIUN.

The Granhtcs Display Module is used with the Graphics M-Controller
MOdule, Top Plane Connector and Controller Connector Assemblies.
The Graohics Display Module contains the storage for the 2b4XX
Data Terminal graphics display 720 X 360 screen dot matrix.
The read-write memory is aceessible throuah the Graphics ~-Controll~r
and terminal bus for memory mOdification and test and through the
Display Controller Module fOr display. It is organiz~d as a
16,384 X 16 bit word linear array.
The module uses 16 lb-pin MOS RAMs each organized 16,384 X 1 bit.

1.1 OPERATION.
The graohics display memory is read by the Graphics M-Controller during
the visible portion of the terminal video display, and modified durina
the horizontal and vertical sweep retrace times.
The memory modification cOnsists of modifving 1 bit at a time
and may oe a loqical operation with the current state, thp
output of a serial pattern memory, or unconditionally set to
'1' '0' or to the same state as the serial pattern memory output.

The pattern memory output may be scaled so that the ratio between
the pattern memory bits and the memory bits may be chanced from
1 to 16.

The display memory bits are displayed such that normally there
is a one-to-one correspondence between the memory and display
bits, automatic refresh is provided since every memory address
is read during one "frame".
In Zoom mOde the scaling Or zoom ratiO may be changed
from 1 to 16. Since the refresh is no longer automatic the
last display bit of each block of repeated display bits
in the 'X' and ' , ' direction is blanked, thus providing time
for the memory refresh Operation (durinq the 'X' blanked lines)
In addition, the 'windOw' resulting from Panninq while In Zoom mode
requires that the memory to be displayed on bit boundaries, the
necessary memory word presnifting is done prior to the heginning of
each display line.
13255 13255-91126/03
Graphics Display MOdule REV DEC-12-77




1.2 GRAPHICS M-CONTROLL~k MnUULr, INTERFAC~.


The Graohics M-Controller interfaces to the Granhics Display Module
through the Controller Connector Assembly (02640-60194 or 02640-ti0022).
This interface provides cOntrol input and timing status output siqnals
tor line and frame synChronization. .
1.3 DISPLAY CONTROLLER MODULE l~TERFACE.


The Disolay Controller M.odule interfaces to the Graohics Display
Module through a Top Plane Connector Assembly (02640-60016 or 02640-
60022). This interface orovides timing input and qr~phics serial data
output to the terminal diSplay.

2.0 OPERATING PARAMFTERS.
A summary of operatlnq parameters for the Graphics Display ~ooule
is contained in tables 1.0 thrOugh 6.3.



Table 1.0 Physical Parameters

================================================================================
, Part Size (L x W x 0) Weight
I Number Nomenclature +/-0.100 Inches (Pounns)
... --------
----------------------- ---------
1=============
I
============================== ------~----------------

I
,
I 02640-60126 Graphics Display PeA 12.5 x 4.00 x 0.5 0.5

, 02640-60016 5-wide Top Plane Connector N/A N/A
Assp.mbly
02640-60022 Top Plane Connector
4-_'i ide N/A N/A
Assembly
02640-60194 Controller Connector N/A l~/ A
Assembly
,
==============================================================================1I
N1mber of Backplane slots Required: 1
1

I
================================================================================
13255 132~5-91126/04
Graphics Display Module REV DEC-12-77




Table 2.0 Reliabilitv and gnvironmental Information

------------------------~-~-~---~-~---~---------------------------------~------
~-------~-------------------------~------------------- --------------------------

,
I

Environmental: ( X ) HP Class B ( ) Other: t
I
Restrictions: Type tested at pronuct level I
I
I
I I
,==============================================================================1I
I Failure 4.8Rate~(percent per 1000 hours)
I I
================================================================================




Table 3.0 Power Supply and ClOCK Requirements - Measured
(At +/-5% Unless otherwise Spe~ified)

==================================================================-==============
1
+5 Volt Supply +12 Volt SUPPlY -12 Volt Supply I -42 Volt Supply
I
~ lA ~ 600 mA ~ 200mA I N/A
I I I
======================================1=======================================
I
115 volts ac I 220 volts ac
I
N/A I N/A
I
=============================================================:================
Clock frequency: 21.06 or 17.60 MHz

================================================================================
13255 13255-Q1126/05
Graphics Display Module R~V DF.C-12-77




Table 4.0 Jumper Definitions

=====================:========:=========:========:==============================
Function
PCA J-----.------------------~--------~------------------- --------1I
DesiQnatlon I In t Out
================1==========================================:=====:=============
I I
I I
I I
Jumper Plug I (Note: This jumper m~st always be installed for I
I eroper ooeration of the PCA.) I
I t
I
I
---------------~----------------------------------------~~----


-5V Applies -5V to the Disconnnects -5V aenerated
RAM array. on the peA. Permits an
external supply to be
connected.




--------------------------------------------------------------------------------
13255 13255-91126/06
Graphics Disolay ~odule REV OEC-l?-77




Table 5.0 Connector Information (Graphics Displav peA).
===============================-=================================================
Connector Signal Signal
and Pin NO. Name Description
_.. --- .... --------
-----_ ... _------ ---------------- ==============================================
Pt, Pin 1 +5V +5 Volt pnwer Supply

-2 GND Ground Common Return (Power and Signal)

-3 Not Used
-4 -12V -12V Power Supply

-5 }
}
-6 }
}
-7 }
} Not Used
-8 }
}
-9 }
}
-10 }
}
-11 }
}
-12 }
}
-13 }
}
-14 }
}
-15 }
}
-16 }


-17 ,
I}
}
}


-18 I}
I}
-19
,
I}

I}
}
-20

-21 ,
I}
}
t
-22 GND I Ground Common Return (Power and Signal)
================================================================================
13255 13255-91126/07
Graphics Display Module REV DEC-12-77


Table 5.0 Connector Informat1on (Graphics Display peA Cont'd).
===========:=====================================================================
Connector Signal Signal
and Pin NO. I Name Description I
==============t================ ==============================================1t
P1, Pi.n A I GND Ground Common Return (Power and Siqnal)
I } I
'-B j } Not Used
I }
'-C I +12V +12 Volt Power Supply
I }
'-0 , } Not Used
}
'-E BUSO N@gative True, Data Bus Bit v

'-F BUS1 Negative True, Data Bus Bit 1

'-H 8U52 Negative True, Data dUS 8it 2

BUS3 Negative True, Data BUs Bit 3
BUS4 Negative True, Data 8\JS Bit 4

'-L BUSS Negative True, Data Bus Bit ~


'-M BUS6 Negative True, Data Bus Bit b




.