Chapter 21 Rom Correction Module; Outline; Block Diagram; Figure 21.2A Block Diagram Of Rom Correction Module - Fujitsu F2MC-16LX MB90580 Series Hardware Manual

Chapter 21:
ROM Correction Module

21.1 Outline

When the setting of the address is the same as the ROM Correction Address register, the INT9 instruction
will be executed. By processing the INT9 interrupt service routine, the ROM correction function can be
achieved.
There are two address registers, in each containing compare enable bit. When the address register and
the program counter are in agreement, and when the compare enable bit is at ' 1', then the CPU will be
forced to execute INT9 instruction.

21.2 Block Diagram

address latch
ROM Correction Address Register
enable bit

Figure 21.2a Block Diagram of ROM Correction Module

comparitor
INT9
command
2
F MC-16 LX
CPU core