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LX51 User's Guide
LX51 Introduction Linking Programs Locating Program Objects Data Overlaying 
Code Banking 
Theory of Operation Configuration I/O Port XDATA Port User-Defined Common Area Bank Area Locating Modules Locating Segments Structuring Programs Examples Four 64K Code Banks On-chip ROM XDATA Port 32K Common Area Real-Time Programs Error MessagesUser-Defined
The following configuration settings are required when user-defined banking is used (?B_MODE = 4).
| Name | Description |
|---|---|
| SWITCHx | For each memory bank, you must create a macro that defines the bank switch code. The number of macros must be consistent with the ?B_NBANKS definition. For example, 4 banks require SWITCH0, SWITCH1, SWITCH2 and SWITCH3 macros. Each macro must generate exactly the same number of code bytes. If the sizes are different you must use NOP instructions to pad out the difference. You must also ensure that the CPU has selected a defined state at startup. The RTX51 real-time operating system does not support this banking mode. |
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