Kürzlich habe ich ein 32K Speichermodul für den HP-71B erstanden, bei dem eine kurze Bedienungsanleitung dabei war. Alles mehr oder weniger selbstverständlich, aber vielleicht doch hilfreich, um ungewollten Datenverlust zu vermeiden.
CMT-71-32R RAM Module for the HP-71 ----------------------------------- Instructions ------------ NOTICE ------ Corvallis Microtechnology, Inc. assumes no liability resulting from any errors or ommissions in these instructions, from the use of the information obtained herein, or from the use of the CMT-71 Plug-In Mo- dules or the CMT-71-P01 EPROM Programmer. All Rights Reserved Copyright 1986 by Corvallis Microtechnology, Inc. INTRODUCTION ------------ The CMT-71 RAM plug into the front Ports of the HP-71B. The maximum extra memory permitted by the use of the CMT-71 Memory Modules is the following: 4 CMT-71-32R = 128K bytes of RAM Section 1 --------- Installing and Removing the Memory Module Caution: * Turn off the HP-71 before you install or remove any module. * After removing a module, turn the HP-71 on and off so it is ready to accept another module. * The contents of the CMT-71-32R are not backed up by battery when removed from the HP-71. * Because there is a chance of memory loss, it is good practice to back up important files before installing or removing any module. To insert a CMT-71 Memory Module: 1. Turn off the HP-71 by pressing (f)(on). 2. Hold the CMT-71 Memory Module with the broadest side facing up, and the connector slot aimed towards an open HP-71 front port. 3. Push the module all the way into the port. To remove a CMT-71 Memory Module: 1. Turn off the HP-71 by pressing (f)(on). To prevent memory loss, FREE PORT the CMT-71-32R before removing it from the port. 2. Use the fingernails of your middle and ring fingers to get hold of the lip on the underside of the module, and pull the module out of the port. 3. Turn the HP-71 on and then off. 4. Insert a blank module into the port to protect its electrical contacts. Section 2 --------- The CMT-71-32R RAM Module When plugged into a front port of the HP-71, each CMT-71-32R Module adds 32K bytes of RAM to the 17.5K bytes of the HP-71 internal RAM. Up to 128K bytes of extra RAM can be thus installed in your HP-71. (See Section 1 for instructions on installing and removing the CMT-71 modules.) Like the HP-71 RAM, the CMT-71 RAM can be used as Main RAM or Independent RAM. Main RAM -------- As soon as the CMT-71 is plugged into a front port of the HP-71, its RAM becomes part of the Main RAM. This can be verified by executing MEM. Main RAM is used for the operations of the HP-71. Therefore, be sure to declare the CMT-71 RAM as Independent RAM (see below) before removing the module from the HP-71. Otherwise, the entire Main RAM will be cleared when the module is removed. Independent RAM --------------- The CMT-71 RAM can be set aside as Indepen- dent RAM by executing: FREE PORT (port number) The contents of the Independent RAM are not disturbed by the operations of the HP-71. Note that the CMT-71 RAM can be FREE PORTed only as a 32K byte block. The CMT-71-32R retains its memory contents while plugged into an HP-71 with proper battery level. It does not contain a battery to back up its memory when unplugged from the HP-71. Because of the CMOS static RAM used, its standby current is typically less than 2 uA. Section 3 --------- Care of the Unit * Always turn off the HP-71B before you install or remove any module. * Keep the electrical contacts of the module clean. Do not insert any foreign object into the slot for the electrical contacts. * Store the module in a clean, dry place. * Observe the temperature specifications: Operating : 0 - 45 degree C Storage : -20 - 55 degree C