Hardware Hacking

With the resistor array moved to the 16MB configuration, the lines between the processor and

SDRAM are connected as follows:

■

Processor address line A12 to SDRAM bank select line BS1

■

Processor address line A13 to SDRAM address line A11

■

Processor address line A15 to SDRAM bank select line BS0

By rearranging the lines between the SDRAM and the processor, the additional address line A15

is used as a high-order bank-select switch. Since the size of each bank in the SDRAM is now 2MB

instead of 1MB,A14 is not used for memory configuration purposes.

Technical Information

This portion of the chapter discusses some additional technical details of the Palm OS ...