wildcard is a metacharacter used to specify multiple strings. In SSBug, the following wildcard characters can be specified as 
.
 * (matches any length string)
 (However, characters after the appearance of this character are ignored.
? Matches any single character 
 

D0 D1 D2 D3 D4 D5 D6 D7
A0 A1 A2 A3 A4 A5 A6 A7
SSP USP PC SR CCR

• Register names are not case sensitive.
• If a symbol name and a register name conflict, the symbol name takes precedence.
• Prefix the character '.' Only when referencing a value in an expression, and specify it without the character '.' When assigning a value in line assembly and X command. The
• CCR value is the value of the lower byte of the SR register.

@B (expr) 1-byte content of address expr on sound board
@W (expr) Content of one word at address expr on the sound board
@L (expr) Content of 1 long word at address expr on the sound board
@BP (expr) Expr-th software breakpoint address
@EXTBL (expr) expression expr value sign extended from byte to longword
@EXTBW (expr) The value of the expression expr is sign-extended from byte to word
@EXTWL (expr) expression expr value sign extended from word to longword

• Function names (characters between the '@' and '' characters are not case sensitive).
• @BP (expr) returns a value without knowing if the breakpoint is valid.

Hexadecimal constant
Decimal constant
Binary constant
Symbol
Register name
Function