Yamaha V9938 Programmer's Manual page 101

5.2.1. Global sprite attributes and tables (SM2)
Register R#1 contains two controls for sprites, allowing magnification and quadruple
sprite pattern size. Register R#8 contains one control bit, "SPD", which allows disabling
and enabling sprite display.
MSB
R#1
R#8
Sprites are defined by three tables: sprite pattern generator table, which controls the
appearance of the dots within the sprite (being on "1" or off "0"), sprite color table, which
control colors of the sprite lines and other attributes, and sprite attribute table, which
controls positioning and used pattern number.
5.2.2. Sprite attribute table (SM2)
The sprite attribute table is an area in the VRAM that defines display coordinates for
all the possible 32 sprites, pattern numbers used for display and some other flags. Each
sprite has four bytes of attribute data, making up 128 bytes (80h) of the memory.
MSB 7
(B) 0
1
2
3
124
125
126
127
© 1985 ASCII CORP. / NIPPON GAKKI CO.
7 6
0 BL IE0
MS LP TP
6 5 4
Y-coordinate (0...255)
X-coordinate (0...255)
Pattern number (0...255)
Reserved
Y-coordinate (0...255)
X-coordinate (0...255)
Pattern number (0...255)
Reserved
5 4 3
M1 M2
CB VR
3 2
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2 1 0 LSB
0 SI MAG
0: Normal Sprite
1: Double magnification
0: 8*8 Sprite size
1:16*16
0 SPD BW
0: Enable Sprite display
1:Disable control
1 0 LSB
Attribute
for sprite #0
Attribute
for sprite #31
© 2010-2015 Eugeny Brychkov
R#1
R#8
area
area