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; 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
shift
endr
ENDM
dc: MACRO ; "crumbs"
rept _NARG / 4
db ((\1) << 6) | ((\2) << 4) | ((\3) << 2) | (\4)
shift
shift
shift
shift
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
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
dbpixel: MACRO
if _NARG >= 4
; x tile, x pxl, y tile, y pxl
db \1 * 8 + \3, \2 * 8 + \4
else
; x, y
db \1 * 8, \2 * 8
endc
ENDM
dsprite: MACRO
; y tile, y pxl, x tile, x pxl, vtile offset, flags, attributes
db (\1 * 8) % $100 + \2, (\3 * 8) % $100 + \4, \5, \6
ENDM
sine_wave: MACRO
; \1: amplitude
x = 0
rept $20
; Round up.
dw (sin(x) + (sin(x) & $ff)) >> 8
x = x + (\1) * $40000
endr
ENDM
bcd: MACRO
rept _NARG
dn ((\1) % 100) / 10, (\1) % 10
shift
endr
ENDM
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