2023-01-06 20:37:08 +00:00
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; defines
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2023-01-06 13:25:04 +00:00
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OpDEY = $88 ; DEY opcode
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OpINY = $c8 ; INY opcode
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OpDEX = $ca ; DEX opcode
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OpINX = $e8 ; INX opcode
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OpNOP = $ea ; NOP opcode
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; zero page addresses
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2023-01-06 20:37:08 +00:00
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YSAVE = $00
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HPTR = $06
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HPAGE = $18 ; hi-res page ($20 or $40) ; FIXME
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PTR1 = $1a
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PTR2 = $1c
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XSTART = $1c
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YSTART = $1d
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XEND = $1e
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YEND = $1f
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2023-01-06 13:25:04 +00:00
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MON_WNDLEFT = $20 ; left column of scroll window
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MON_WNDWDTH = $21 ; width of scroll window
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MON_WNDTOP = $22 ; top of scroll window
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MON_WNDBTM = $23 ; bottom of scroll window
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MON_CH = $24 ; cursor horizontal displacement
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MON_CV = $25 ; cursor vertical displacement
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2023-01-07 02:56:36 +00:00
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GBASL = $26
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GBASH = $27
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2023-01-06 20:37:08 +00:00
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2023-01-06 13:25:04 +00:00
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MON_CSWL = $36 ; character output hook (lo)
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MON_CSWH = $37 ; character output hook (hi)
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DELTA_X = $3c
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DELTA_Y = $3d
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LINE_ADJ = $3e
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2023-01-06 20:37:08 +00:00
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2023-01-06 13:25:04 +00:00
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LINE_INDEX = $43
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2023-01-06 20:37:08 +00:00
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FIRST_LINE = $45 ; FIXME: what if interrupt?
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2023-01-06 13:25:04 +00:00
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LAST_LINE = $46
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2023-01-06 20:37:08 +00:00
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BAS_ARYTAB = $6b ; pointer to start of Applesoft array space (2b)
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2023-01-07 02:56:36 +00:00
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HGR_X = $E0
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2023-01-06 20:37:08 +00:00
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; Clear variables
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XC = $19 ; transformed X coordinate
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YC = $1a ; transformed Y coordinate
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ZC = $1b ; transformed Z coordinate
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SCALE = $1c ; $00-0F, where $0F is full size
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XPOSN = $1d ; X coordinate (0-255)
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YPOSN = $1e ; Y coordinate (0-191)
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ZROT = $1f ; Z rotation ($00-1B)
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YROT = $3c ; Y rotation ($00-1B)
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XROT = $3d ; X rotation ($00-1B)
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ROT_TMP = $3f ; 4 bytes long
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OUT_INDEX = $43
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FIRST_POINT = $45
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LAST_POINT = $46
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