2 ;-----------------------------------------------------------------------------
13 RNDL = $4E ; Random value, low byte
14 RNDH = $4F ; Random value, high byte
15 MEMSIZE = $73 ; Highest free RAM location
17 ;-----------------------------------------------------------------------------
20 BRKVec = $03F0 ; Break vector
21 RESTOR = $03D0 ; Goto Dos
23 ; ---------------------------------------------------------------------------
29 ;-----------------------------------------------------------------------------
34 ; Write to USEROM to enable apple rom C000-CFFF
37 ; 80 column card switches
47 CLEAR_KEY_STROBE = $C010
54 ;-----------------------------------------------------------------------------
57 ; Text output and helpers
62 ; Graphics entry points, by cbmnut (applenut??) cbmnut@hushmail.com
63 WHITE = $01 ; White for $1c, I think...
65 COLOR = $1C ; Current plot color
67 HGR2 = $F3D8 ; Initialize and clear hi-res page 2.
69 HGR = $F3E2 ; Initialize and clear hi-res page 1.
71 HCLR = $F3F2 ; Clear the current hi-res screen to black.
73 BKGND = $F3F6 ; Clear the current hi-res screen to the
74 ; last plotted color (from ($1C).
76 HPOSN = $F411 ; Positions the hi-res cursor without
78 ; Enter with (A) = Y-coordinate, and
79 ; (Y,X) = X-coordinate.
81 HPLOT = $F457 ; Calls HPOSN and tries to plot a dot at
82 ; the cursor's position. If you are
83 ; trying to plot a non-white color at
84 ; a complementary color position, no
85 ; dot will be plotted.
87 HLIN = $F53A ; Draws a line from the last plotted
88 ; point or line destination to:
89 ; (X,A) = X-coordinate, and
92 HFIND = $F5CB ; Converts the hi-res coursor's position
93 ; back to X- and Y-coordinates; stores
94 ; X-coordinate at $E0,E1 and Y-coordinate
97 DRAW = $F601 ; Draws a shape. Enter with (Y,X) = the
98 ; address of the shape table, and (A) =
99 ; the rotation factor. Uses the current
102 XDRAW = $F65D ; Draws a shape by inverting the existing
103 ; color of the dots the shape draws over.
104 ; Same entry parameters as DRAW.
106 SETHCOL = $F6EC ; Set the hi-res color to (X), where (X)
107 ; must be between 0 and 7.
109 PREAD = $FB1E ; Read paddle in X, return AD conv. value in Y