Fujitsu microcontroller bottom drive, MB91530 on the boot code, can be used as a reference to write their own bootloader.

MB91F59x_CAN_Bootloader_V1.1_53B_DM\Document\(UM)FR81_CAN_Boot_UserManul_MB91590_V1.0.1.pdf
...................................\Product\Firmware\Source code\Bootloader\app\c_can.c
...................................\.......\........\...........\..........\...\c_can.h
...................................\.......\........\...........\..........\...\flash.c
...................................\.......\........\...........\..........\...\flash.h
...................................\.......\........\...........\..........\Bootloader.dat
...................................\.......\........\...........\..........\Bootloader.prj
...................................\.......\........\...........\..........\Bootloader.wsp
...................................\.......\........\...........\..........\Debug\ABS\Bootloader.abs
...................................\.......\........\...........\..........\.....\...\Bootloader.mhx
...................................\.......\........\...........\..........\.....\C_CAN.sup
...................................\.......\........\...........\..........\.....\HighSpeed4.sup
...................................\.......\........\...........\..........\.....\LST\Bootloader.log
...................................\.......\........\...........\..........\.....\...\Bootloader.mp1
...................................\.......\........\...........\..........\.....\...\c_can.asm
...................................\.......\........\...........\..........\.....\...\flash.asm
...................................\.......\........\...........\..........\.....\...\vectors.asm
...................................\.......\........\...........\..........\.....\...\_fr.asm
...................................\.......\........\...........\..........\.....\OBJ\c_can.obj
...................................\.......\........\...........\..........\.....\...\c_can.stk
...................................\.......\........\...........\..........\.....\...\flash.obj
...................................\.......\........\...........\..........\.....\...\flash.stk
...................................\.......\........\...........\..........\.....\...\startup.obj
...................................\.......\........\...........\..........\.....\...\vectors.obj
...................................\.......\........\...........\..........\.....\...\vectors.stk
...................................\.......\........\...........\..........\.....\...\_fr.obj
...................................\.......\........\...........\..........\.....\...\_fr.stk
...................................\.......\........\...........\..........\.....\.PT\Bootloader.opa
...................................\.......\........\...........\..........\.....\...\Bootloader.opb
...................................\.......\........\...........\..........\.....\...\Bootloader.opc
...................................\.......\........\...........\..........\.....\...\Bootloader.opl
...................................\.......\........\...........\..........\.....\...\Bootloader.opv
...................................\.......\........\...........\..........\platform\fci.h
...................................\.......\........\...........\..........\........\init_MB91590.c
...................................\.......\........\...........\..........\........\ioreg.txt
...................................\.......\........\...........\..........\........\ioregj.txt
...................................\.......\........\...........\..........\........\ioregj_a.txt
...................................\.......\........\...........\..........\........\ioreg_a.txt
...................................\.......\........\...........\..........\........\mb91590.h
...................................\.......\........\...........\..........\........\mb91590_a.inc
...................................\.......\........\...........\..........\........\sbrk.c
...................................\.......\........\...........\..........\........\startup.asm
...................................\.......\........\...........\..

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