These are DATA_SND commands that send data to 00:0810-00:0867 which is WRAM. I loaded the SGB and SGB2 ROMs to no$sns (obviously emulating only the SNES side for a quick look). SGB2 had identical values as was suggested in the manual, except a few bytes in the end. On SGB1 instead this memory area was mostly empty. (00FF pattern.)When writing programs that use the system commands of SGB and SGB2, use the initialization routine of the
game program to send the following 8 packets of default data to the register file.
Has anyone looked into what these values are actually used for? Do you really need to transfer them?
Code: Select all
DataSnd0::
DB $79,$5D,$08,$00,$0B,$8C,$D0,$F4,$60,$00,$00,$00,$00,$00,$00,$00
DataSnd1::
DB $79,$52,$08,$00,$0B,$A9,$E7,$9F,$01,$C0,$7E,$E8,$E8,$E8,$E8,$E0
DataSnd2::
DB $79,$47,$08,$00,$0B,$C4,$D0,$16,$A5,$CB,$C9,$05,$D0,$10,$A2,$28
DataSnd3::
DB $79,$3C,$08,$00,$0B,$F0,$12,$A5,$C9,$C9,$C8,$D0,$1C,$A5,$CA,$C9
DataSnd4::
DB $79,$31,$08,$00,$0B,$0C,$A5,$CA,$C9,$7E,$D0,$06,$A5,$CB,$C9,$7E
DataSnd5::
DB $79,$26,$08,$00,$0B,$39,$CD,$48,$0C,$D0,$34,$A5,$C9,$C9,$80,$D0
DataSnd6::
DB $79,$1B,$08,$00,$0B,$EA,$EA,$EA,$EA,$EA,$A9,$01,$CD,$4F,$0C,$D0
DataSnd7::
DB $79,$10,$08,$00,$0B,$4C,$20,$08,$EA,$EA,$EA,$EA,$EA,$60,$EA,$EA