#reserved 0x7F

[olo76]

Hello,

My bootloader (pic16f887) use ram address 0x7F (for save PCLATH register), and if the interrupt in ccs compiler 4.099 use address 0x7F (for save W register). Directive #reserved 0x7F not working, why?

Regards, Olek

[Ttelmah]

Various comments:
1) Why worry?. After the main code has loaded, the bootloader is no longer involved in running, so why does it matter?.
2) The 'reason', is that CCS has already reserved this byte, as 'not used' by C. It is flagged as non available, specifically for the interrupt handler, so 'reserving' it has no effect. Unlike the scratch area (which is similarly reserved), which can be relocated by the device editor, this byte seems to be 'fixed'.
3) Given '2', I'd personally play it simple, and if the main code overwriting the byte does matter, alter to bootloader to use 0x70.

Best Wishes