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HP 13255
CONTROL MEMO~Y WI BANK SELECT MODULF.
Manual Part No. 13255-91221
REVISED
OCT-10-18
DATA TERMINAL
TECHNICAL INFORMATION
HEWLETT~PACKARD
Printed in U.S.A.
13255 13255-91221/02
Control Memory WI 8ank Select Module Rev OCT-lO-78
1.0 I~TRODUCTION.
The control MemorY wI Bank Sel. Module provides 256 bytes of RAM and
32K bytes of FOM. The module communicates with the processor oyer a
top plane bus. This allows the processor to operate at its maximum
rate by ellm1nating the bus contention and handshake protocol Of the
bottom plane bus.
The ROMs contain the operatinq firmware fOr the terminal. The RAM
proVides for a fast access scratchpad for stack operations and program
variables.
2.0 OPERATING PARAMETERS.
A summary of operating parameters for the Control Memory wI Bank Sel.
ModUle is contained in tables 1.0 through 5.1.
Table 1.0 Physical Parameters
====:===========================================================================
Part Size (L x W x 0) I Weight
Number Nomenclature +1-0.100 Inches I (Pounds)
=============,=====:===============::=======1========:==============1=========
02640-60'-21 Control Memory PCA 12.5 x 4.0 x 0.5 0.56
02640-60216 Prom Control Memory peA 12.5 x 4.0 x 0.5 0.56
==============================================================================
Number of Backplane Slots Required: t
======================================================::::::::=:=:==:::::=:::=::
HP 13255
CONTROL MEMORY WI BANK SELECT MODULE
Manual Part NO. 13255-91221
REVISED
OCT-10-78
--------------------.--------------------------------------~--------------------------
NOTICE
The information contained In this document is subject to change
without notice.
HEWL~TT-PACKARD MAKES NO WARRANTy OF A~Y KJND WITH REGARD TO THIS
MATERIAL, INCLUDING, BUT NOT LIMITED TO THE IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. Hewlett-pac~ard
shall not be liable for errOrs contained herein Or for incidental or
consequential damaqes in connection with t~e furnishing, performance,
or use of this material.
This document eontains proprietary information which Is protected by
copyright. All rights are reserved. NO part of this document may be
Photocopied or reproduced without the prior written consent of Hewlett-
Packard Company.
-------~~~-----------------~-~-~----.---------------------------------------~---
Copyright c 1976 by HEWLETT-PACKARD COMPANY
NOTE: This document is part of the 264XX DATA TERMINAL product
series Technical Information Packaqe (HP 13255).
13255 13255-91221/02
Control Memory WI Bank Select Module Rev OCT-I0-78
1.0 INTRODUCTION.
The Control Memory wI Bank Sel. Module provides 256 bytes of RAM and
32K bytes of FOM. The module communicates with the processor over a
top plane bus. This allows the processor to operate at its maximum
rate by elimInating the bus contention and handshake protocol Of the
bottom plane bus.
- ,
The ROMs contain the operatinq firmware fOr the terminal. The RAM
provides for a fast access scratchpad for stack operations and program
variables.
2.0 OPERATING PARAMETERS.
A summary of operating parameters for the Control Memory wI Bank Sel.
Module is contained in tables 1.0 through 5.1.
Table 1.0 Physical Parameters
================================================================================
Part Size (L x W x 0) I weight
Number Nomenclature +1-0.100 Inches I (Pounds)
=============1=====:========================1=======================1=========
02640-60'-21 Control Memory PCA 12.5 x 4.0 x 0.5 0.56
02640-60216 Prom control Memory PC~ 12.5 x 4.0 x 0.5 0.56
==============-================================================================
Number of Backplane Slots Required: t
==========:==========,======:=========================:::::::::=:====:::=:::::::=
13255 13255-91221/03
Control Memory WI Bank Select Module Rev OCT-lO-78
Table 2.0 Reliability and Environmental Information
=====:=:========================================================================
Environmental: ( X ) HP Class B ( ) Other:
Restrictions: Type tested at product level
==============================================================================
Failure Rate: .8132 (percent per 1000 hours)
3.424 (with 16 ROMs loaded on peA)
====================================~================= ==========================
Table 3.0 Power Supply and Clock Requirements - Measured
(At +/-5% Unless Otherwise Specified)
====================================================:===========================
+5 volt Supply +12 volt Supply -12 volt Supply +42 volt Supply
fa P30 rnA fa 830 rnA rnA mA
NOT APPLICABLE NOT APPLICABLE
====================================== =======================================
115 volts ac 220 volts ac
A
NOT APPLICABLE NOT APPLICABLE
=================================:==============:=============================
Clock Frequency: MHz
NOT APPLICABLE
================================================================================
13255 13255-91221/04
Control ~emory WI Bank Select Module Rev OCT-IO-78
Table 4.0 Switch Definitions
================================================================================
Function
PCA
Designation I-----------~--------------~----------~-~--~~---------~-------I
CLOSE OPEN
================ ===~========================== ~--~-~---~------------~~~--~~
---~~---~----~------------~---
ROM OISAS The corresponding 2K block The corresDondinq 2K bloCK
(0,2,4,