Sgb Programming Cautions; Rom Data (Required); Default Data (Required); Sou_Trn Default Data (Required) - Nintendo GAME BOY Programming Manual

4. SGB PROGRAMMING CAUTIONS

4.1 ROM Data (Required)

To use the functions of SGB (system commands), the following values must be stored in ROM at the
locations indicated.
146h ← 03h, 14Bh ← 33h

4.2 Default Data (Required)

When writing programs that use the functions of SGB, use the initialization routine of the game
program to send default data (see Chapter 6) to the register file.

4.3 SOU_TRN Default Data (Required)

When using the
SOU_TRN
register file before
system command, send the
is used.
SOU_TRN
Appendix 1: Programming Cautions
default data (see Chapter 6) to the
SOU_TRN
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