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boot, applicative program and interrupts

gouezel yann

Here is my configuration address:
Boot program (EPROM) 0000-3FFF
Application (RAM) 4000-FFFF
Interrupt vectors are from 0000 to 007B,
i.e. fixed in EPROM. My boot program doesn't used any interrupt, but my applicative downloaded program use them.

ItBoot.c:
#pragma SRC
void ITx(void) interrupt x using y {
#pragma asm
LJMP $40x0
#pragma endasm
}

ItAppli.c:
void ITx(void) interrupt x using y {
MyITx();
}
void MyITx(void) {
TreamentMyITx();
}
void TreamentMyITx(void) {
... // My treament of IT vector x
}
NB:MyITx() function is fixed in address 40x0H with linker directive

Today this the only way I can see. Does it work? Can I use longjmp() routine? how? Does any other solution (with less call of functions) exist?

Thank you for your help
Yann

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