ref: 3144b54bd1dcc47ea339fcd2bd215ec96fc38c4a
dir: /macros/data.asm/
; Value macros percent EQUS "* $ff / 100" ; Constant data (db, dw, dl) macros dwb: MACRO dw \1 db \2 ENDM dbw: MACRO db \1 dw \2 ENDM dbbw: MACRO db \1, \2 dw \3 ENDM dbww: MACRO db \1 dw \2, \3 ENDM dbwww: MACRO db \1 dw \2, \3, \4 ENDM dn: MACRO ; nybbles rept _NARG / 2 db ((\1) << 4) | (\2) shift 2 endr ENDM dc: MACRO ; "crumbs" rept _NARG / 4 db ((\1) << 6) | ((\2) << 4) | ((\3) << 2) | (\4) shift 4 endr ENDM dx: MACRO x = 8 * ((\1) - 1) rept \1 db ((\2) >> x) & $ff x = x - 8 endr ENDM dt: MACRO ; three-byte (big-endian) dx 3, \1 ENDM dd: MACRO ; four-byte (big-endian) dx 4, \1 ENDM bigdw: MACRO ; big-endian word dx 2, \1 ; db HIGH(\1), LOW(\1) ENDM dba: MACRO ; dbw bank, address rept _NARG dbw BANK(\1), \1 shift endr ENDM dab: MACRO ; dwb address, bank rept _NARG dwb \1, BANK(\1) shift endr ENDM dba_pic: MACRO ; dbw bank, address db BANK(\1) - PICS_FIX dw \1 ENDM bcd: MACRO rept _NARG dn ((\1) % 100) / 10, (\1) % 10 shift endr ENDM sine_table: MACRO ; \1 samples of sin(x) from x=0 to x<32768 (pi radians) x = 0 rept \1 dw (sin(x) + (sin(x) & $ff)) >> 8 ; round up x = x + DIV(32768, \1) ; a circle has 65536 "degrees" endr ENDM