Sharp MZ-800 - Page 121

PATTERN
Format
Explanation
Example
PATTERN [<colour specification >]<numeric data>, <text data>
<colour specification> = [<palette code>][,<superimpose mode>]
The PATTERN statement defines a graphics pattern in the specified colour. The
meanings of the <colour specification > parameter are identical to those of the SET
statement. When this parameter is omitted, the parameters in the COLOR state-
ment are assumed,
The pattern to be drawn can be specified using <numeric data> and <text data>.
<numeric data> (+1 to +24) represents the number of stacked 8-bit dot pattern
rows, and <text data> represents the individual dot pattern rows.
Drawing of the pattern is controlled by the position pointer. The number of dot
pattern rows specified by <numeric data> are displayed from bottom to top if
<numeric data> is positive and from top to bottom if it is negative. After the speci-
fied number of dot pattern rows are drawn, dot pattern lines 8 bits (1 character)
to the right of the current column are displayed. <text data> must be specified
using ASCII codes which correspond to the binary representation of dot pattern rows.
(Binary number) On BI S-T tT
5 7 ~+ 57 (hexadecimal)
~+* CHR$($57) or “W""
10 POSITION 100,100.. Sets up the position pointer.
20 PATTERNI2,016,’’ABCDEF’’
30 END
The above program draws the graphics pattern shown below in a colour from palette
2.
Binary Hexadecimal
‘or Character representation
701000110 +46 +"F"
01000901 4s rE?
701000100 +44 + "Dp"
-01000011 +43 +"C"
701000010 ~42 ~"B"
-01000001 -41 —"A"
Position pointer before execution
Line 20 above can be replaced by the following line:
20 PATTERNI2,0]6,CHR$($41,$42,$43,$44,$45,$46)
POSITION