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Andre Brait
98763e3bff
Hardware reset starts the firmware with SFR 0x97 = 1, which maps xdata 0x4000-0xbfff to the flash image: reads return flash bytes, writes are lost. main() cleared it only after __mcs51_genXINIT and the XSEG clear had run, so XISEG (initialised globals) and the part of XSEG above 0x4000 kept stale RAM contents, e.g. session_timeout = 4484 and LLDP blocked on logical ports 0, 3 and 5. Clear it in __sdcc_external_startup(), which SDCC calls before both. Rename SFR_97 to MAP_FLASH_PAGE_TO_XDATA.