Program Execution Flow; Program Transition Diagram (When One Place Is Corrected) - NEC PD78056F User Manual

25.6

Program Execution Flow

Figures 25-9 and 25-10 show the program transition diagrams when the ROM correction is used.
Figure 25-9. Program Transition Diagram (When One Place Is Corrected)
FFFFH
F7FFH
F7FDH
0000H
(1) Branches to address F7FDH when fetch address matches correction address
(2) Branches to correction program
(3) Returns to internal ROM program
Remark Area filled with diagonal lines : Internal expansion RAM
JUMP : Correction program start address
534
CHAPTER 25 ROM CORRECTION
BR !JUMP
Correction Program
JUMP
Internal ROM
Correction Place
xxxxH
Internal ROM
(2)
(1)
(3)