mirror of
https://github.com/cc65/cc65.git
synced 2024-07-05 21:29:03 +00:00
95 lines
3.2 KiB
PHP
95 lines
3.2 KiB
PHP
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;-----------------------------------------------------------------------------
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; Zero page stuff
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MIN_X = $20
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MAX_X = $21
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MIN_Y = $22
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MAX_Y = $23
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CH = $24
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CV = $25
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BASL = $28
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TEXTTYP = $32
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RNDL = $4E ; Random value, low byte
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RNDH = $4F ; Random value, high byte
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MEMSIZE = $73 ; Highest free RAM location
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;-----------------------------------------------------------------------------
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; Vectors
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BRKVec = $03F0 ; Break vector
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RESTOR = $03D0 ; Goto Dos
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;-----------------------------------------------------------------------------
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; Hardware
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; Soft switches
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;
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; Write to USEROM to enable apple rom C000-CFFF
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USEROM := $C007
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; 80 column card switches
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C80ON := $C00C
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C80OFF := $C00D
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RD80COL := $C01F
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MIXOFF := $C052
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PG2OFF := $C054
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PG2ON := $C055
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RDPAGE2 := $C01C
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; Keyboard entries
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CLEAR_KEY_STROBE:= $C010
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KEY_STROBE := $C000
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; Game controller
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OPEN_APPLE := $C061
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CLOSED_APPLE := $C062
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;-----------------------------------------------------------------------------
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; ROM routines
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RDKEY := $FD0C
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; Text output and helpers
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HOME := $FC58
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VTABZ := $FC24
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COUT := $FDED
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; Graphics entry points, by cbmnut (applenut??) cbmnut@hushmail.com
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WHITE = $01 ; White for $1c, I think...
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COLOR = $1C ; Current plot color
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TEXT := $F399 ; Return to text screen
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HGR2 := $F3D8 ; Initialize and clear hi-res page 2.
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HGR := $F3E2 ; Initialize and clear hi-res page 1.
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HCLR := $F3F2 ; Clear the current hi-res screen to black.
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BKGND := $F3F6 ; Clear the current hi-res screen to the
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; last plotted color (from ($1C).
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HPOSN := $F411 ; Positions the hi-res cursor without
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; plotting a point.
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; Enter with (A) = Y-coordinate, and
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; (Y,X) = X-coordinate.
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HPLOT := $F457 ; Calls HPOSN and tries to plot a dot at
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; the cursor's position. If you are
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; trying to plot a non-white color at
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; a complementary color position, no
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; dot will be plotted.
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HLIN := $F53A ; Draws a line from the last plotted
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; point or line destination to:
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; (X,A) = X-coordinate, and
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; (Y) = Y-coordinate.
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HFIND := $F5CB ; Converts the hi-res coursor's position
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; back to X- and Y-coordinates; stores
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; X-coordinate at $E0,E1 and Y-coordinate
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; at $E2.
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DRAW := $F601 ; Draws a shape. Enter with (Y,X) = the
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; address of the shape table, and (A) =
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; the rotation factor. Uses the current
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; color.
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XDRAW := $F65D ; Draws a shape by inverting the existing
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; color of the dots the shape draws over.
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; Same entry parameters as DRAW.
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SETHCOL := $F6EC ; Set the hi-res color to (X), where (X)
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; must be between 0 and 7.
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PREAD := $FB1E ; Read paddle in X, return AD conv. value in Y
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