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 ;-----------------------------------------------------------------------------
28 ; Write to USEROM to enable apple rom C000-CFFF
31 ; 80 column card switches
40 CLEAR_KEY_STROBE:= $C010
47 ;-----------------------------------------------------------------------------
52 ; Text output and helpers
57 ; Graphics entry points, by cbmnut (applenut??) cbmnut@hushmail.com
58 WHITE = $01 ; White for $1c, I think...
59 COLOR = $1C ; Current plot color
61 TEXT := $F399 ; Return to text screen
62 HGR2 := $F3D8 ; Initialize and clear hi-res page 2.
63 HGR := $F3E2 ; Initialize and clear hi-res page 1.
64 HCLR := $F3F2 ; Clear the current hi-res screen to black.
65 BKGND := $F3F6 ; Clear the current hi-res screen to the
66 ; last plotted color (from ($1C).
67 HPOSN := $F411 ; Positions the hi-res cursor without
69 ; Enter with (A) = Y-coordinate, and
70 ; (Y,X) = X-coordinate.
71 HPLOT := $F457 ; Calls HPOSN and tries to plot a dot at
72 ; the cursor's position. If you are
73 ; trying to plot a non-white color at
74 ; a complementary color position, no
75 ; dot will be plotted.
76 HLIN := $F53A ; Draws a line from the last plotted
77 ; point or line destination to:
78 ; (X,A) = X-coordinate, and
80 HFIND := $F5CB ; Converts the hi-res coursor's position
81 ; back to X- and Y-coordinates; stores
82 ; X-coordinate at $E0,E1 and Y-coordinate
84 DRAW := $F601 ; Draws a shape. Enter with (Y,X) = the
85 ; address of the shape table, and (A) =
86 ; the rotation factor. Uses the current
88 XDRAW := $F65D ; Draws a shape by inverting the existing
89 ; color of the dots the shape draws over.
90 ; Same entry parameters as DRAW.
91 SETHCOL := $F6EC ; Set the hi-res color to (X), where (X)
92 ; must be between 0 and 7.
93 PREAD := $FB1E ; Read paddle in X, return AD conv. value in Y