User`s guide

B.9 Flash ROM Structure
Changing TOY RAM Location 3F—Basic Debug Monitor Commands
Follow this procedure to change the value in location 0x3F, then load and start
the selected image:
1. Remove the jumper at J1—25/26 (BOOT_OPTION) (see Figure 2–2).
2. Turn power on. The debug monitor will be loaded.
3. Determine the TOY RAM value for the image you have chosen.
4. Use the debug monitor to write nn (selected operating system type from
Table B–6) in TOY RAM location 0x3F. Check that the value nn was
written correctly by reading nn from the location.
>wb703F
>wb71nn
>wb703F
>rb71
nn
5. Turn power off.
6. Install the jumper at J1—25/26.
7. Turn power on. The EB164 will load and execute the image specified by
the value in TOY RAM 0x3F.
SROM Initialization B–13