Fujitsu MB90895 Series Hardware Manual page 583

2
I E
PROM Memory Map
Figure 17.4-3 shows the allocation of the patch program and data at storing the patch program in E
G
Patch program byte count
The total byte count of the patch program (main body) is stored.If the byte count is "00
no patch program is provided.
G
Detect address (24 bits)
The address where the instruction code is replaced by the INT9 instruction code due to program error is
stored.This address is set in the detection address setting registers (PADR0 and PADR1).
G
Patch program (main body)
The program executed by the INT9 interrupt processing when the program address matches the detect
address is stored.Patch program 0 is allocated from any predetermined address.Patch program 1 is allocated
from the address indicating <starting address of patch program 0 + total byte count of patch program 0>.
Figure 17.4-3 Allocation of E
2
E PROM
Address
0 0 0 0 Patch program byte count
H
0 0 0 1 Detect address0 (Low)
H
PADR0
0 0 0 2 Detect address0 (Middle)
H
0 0 0 3
Detect address0 (High)
H
0 0 0 4 Patch program byte count
H
0 0 0 5
Detect address1 (Low)
H
PADR1
0 0 0 6 Detect address1 (middle)
H
0 0 0 7
Detect address1 (High)
H
0 0 1 0
H
Patch program0
(main body)
0 0 2 0
H
Patch program1
(main body)
CHAPTER 17 Address Match Detecting Function
2
PROM Patch Program and Data
Patch program0
Patch program1
2
PROM.
", it indicates that
H
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