Sorry for bringing up topic which was widely discussed a while ago. However, now I can hardly find related information and any help will be appreciated.
The issue is copying SAM-BA from ROM to SRAM and running it from there.
This works fine for S64 with the following addresses:

SAMBA_ROM_START_ADDRESS EQU 0x300E00
SAMBA_RAM_START EQU 0x200110

so SAM-BA is copied from ROM_START into 0x200000 (SRAM) and executed from RAM_START. It works fine for S64, but fails for S256. One of the older threads suggested, that for X256 these addresses are:

SAMBA_ROM_START_ADDRESS EQU 0x300000
SAMBA_RAM_START EQU 0x200118

but it also doesn't work on S256.
Does anybody know these magic numbers for S256?