Toshiba TMP91C824F Data Book page 116

3.8.4 Operational description
Set up bank value and bank use in bank setting-register of each local area of LOCAL register in common
area. Moreover, in that case, a combination pin is set up and mapping is simultaneously set up by the
CS/WAIT controller. When CPU outputs logical address of the local area, MMU outputs physical address
to the outside address bus pin according to value of bank setting-register. Access of external memory
becomes possible therefore.
Please do not use as bank that overlaps with another bank since this common area overlaps with either of
eight banks of local area on the physical map.
Example program is as next page follows
91C824-113
TMP91C824