RPD-95
Help
Guide

Keystroke Pro

• RPD-95
• Application Guide
• User Guide
• Programming Guide
  • Introduction
  • Function Reference
  • Working with Programs
  • Calculator Functions in a Program
  • Displaying Messages
  • Controlling the Sequence
  • Using Tests in a Program
  • Using Indirect Addressing
  • Partitioning Memory
  • File Operations
  • External File Storage
  • Developing Your Own Programs
  • Appendix A - Advanced Memory
  • Appendix B - Advanced I/O Operations
  • Appendix C - Reference Information
• Help Pages Index

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Why Change Memory Partitions?

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Partitioning lets you increase or decrease an area of user memory, trading one type of memory for another. Some examples are shown here, but there are many other possibilities.

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Increasing the Data Registers

You might write a program that generates a large amount of data, requiring and additional 50 data registers. Each data register requires eight bytes of memory. The 400 additional bytes are taken from the memory originally partitioned as the highest numbered program steps (steps 600-999).

Default Partitions		After Increasing data registers
file byte 0000		file byte 0000
...		...
file byte 5199		file byte 5199
step 0000		step 0000
...		...
...		step 0599
...
step 0999		register 174
		...
register 124		...
...		...
register 000		register 000

Increasing the Program Memory

You might want to write a large that requires more than 1000 steps but uses only a few data registers. Because each data register occupies eight bytes of memory, you can gain 400 program steps by sacrificing only 50 data registers.

Default Partitions		After Increasing program memory
file byte 0000		file byte 0000
...		...
file byte 5199		file byte 5199
step 0000		step 0000
...		...
step 0999		...
		...
register 124		step 1399
...
...		register 074
...		...
register 000		register 000

Eliminating File Space

When using an optional Constant Memory™ cartridge for file storage, you may want to partition the calculator's file space to zero. This makes all user memory available for large programs and large amounts of data.

This illustration shows the resulting partitions if you set the file space to zero, the program memory to 4000 steps, and the number of data registers to 400.

Default Partitions		After elminating file space
file byte 0000		step 0000
...		...
file byte 5199		...
		...
step 0000		step 3999
...
step 0999		register 399
		...
register 124		...
...		...
register 000		register 000

Note:

You cannot repartition file space that is occupied by files you have saved. If you attempt to do so, the calculator displays the message FILES IN USE. This prevents you from inadvertently destroying files through repartitioning.

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