Commodore 128D - Page 132

on (equal to 1), the corresponding pixel on the screen is turned on in
the foreground color. The combination of zeroes and ones produces
the image you see on the screen.
Since a sprite is 24 by 21 pixels and each pixel requires one bit of .-■■-j
storage In memory, one sprite uses up 63 bytes of memory. See Fig- I )
ure 6-8 to understand the storage requirements for a sprite's data.
12345678 12345678 12345678 U
1
i \ i
3 \—/
4
6 i i
7
8
9
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12
13
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15
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21
Each Row = 24 bits = 3 bytes
Figure 6-8. Sprite Data Requirements
A sprite requires 63 bytes of data. Each sprite block is actually made
up of 64 bytes; the extra byte is not used. Since the Commodore 128
has eight sprites and each one consists of a 64-byte sprite block, the
computer needs 512 (8 x 64) bytes to represent the data of all eight
sprite images.
124 USING C128 MODE—Color, Animation and Sprite Graphics Statements