Table of Contents
Advertisement
Chapter 15: Installation
Installing Hardware
2 Determine the placement of the emulation memory modules. Three types of modules may be installed:
256 Kbyte (HP 64171A or HP 64172A), 1 Mbyte (HP 64171B or HP 64172B), and 4 Mbyte
(HP 64173A). Any type of module may be installed in either bank.
Memory in bank 0 is divided into 4 equal blocks that can be allocated by the memory mapper. Memory
in bank 1 is divided into 2 equal blocks.
If you have only one emulation memory module, place it in bank 0 to give yourself greater flexibility
when mapping address ranges to emulation memory. If you have two memory modules and one is larger
than the other, place the larger module in bank 0 to give yourself more evenly proportioned blocks.
The HP 64171A/B memory modules provide 0 wait state emulation memory through 16.7 MHz and 1
wait state above 16.7 MHz. The HP 64172A/B memory modules provide 0 wait state emulation memory
through 25 MHz. The HP 64173A memory modules provide 0 wait state emulation memory through
22 MHz and 1 wait state above 22 MHz. (The 68340 processor is programmed for the correct number of
wait states by user code.) If memory modules are mixed, the performance characteristics of the slower
module should be used.
528
Advertisement
Table of Contents
