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STN-25

When using palette format sprites in VDP1


 issue number:
STN-22
 date of issue:
95/01/20
 media:
●Common ○CD-ROM ○Cartridge ○Others
 connection:
○Program ●Hard ○Manual ○Tools ○Game ○ Bug ○Others
 Information distinction:
●New ○Change ○Addition
 importance:
●Strict observance ○Recommended ○Reference ○Others
 attached file:
●No ○ Yes
 Subject supplement:

Contents

When using sprites in palette format, the picture may not be displayed depending on the palette code and color bank values. This is because the dot data is judged as VDP2 shadow function dot data (normal shadow data).

Sprite data that is determined as normal shadow data will look like the table in the attached document, depending on the sprite type set in VDP2.

Normal shadow data list by sprite type
sprite type number of colors pallet code color bank
Type 0~3,5
 16
64
128
256
 1110
xx11 1110
x111 1110
1111 1110
 xxxx x111 1111 0000
xxxx x111 11xx 0000
xxxx x111 1xxx 0000
xxxx x111 xxxx 0000
Type 4, 6
 16
64
128
256
 1110
xx11 1110
x111 1110
1111 1110
 xxxx xx11 1111 0000
xxxx xx11 11xx 0000
xxxx xx11 1xxx 0000
xxxx xx11 xxxx 0000
type 7
 16
64
128
256
 1110
xx11 1110
x111 1110
1111 1110
 xxxx xxx1 1111 0000
xxxx xxx1 11xx 0000
xxxx xxx1 1xxx 0000
xxxx xxx1 xxxx 0000
Type C~F
 16
64
128
256
 1110
xx11 1110
x111 1110
1111 1110
 xxxx xxxx 1111 0000
xxxx xxxx 11xx 0000
xxxx xxxx 1xxx 0000
Not relevant
type 8
 16
64
128
256
 1110
xx11 1110
x111 1110
1111 1110
 xxxx xxxx x111 0000
xxxx xxxx x1xx 0000
Not relevant
Not relevant
Type 9~B
 16
64
128
256
 1110
xx11 1110
x111 1110
1111 1110
 xxxx xxxx xx11 0000
Not relevant
Not relevant
Not relevant

reference
"HARDWARE MANUAL/VDP2 User's Manual" ■9.1 Sprite data
"●Normal shadow sprite"
that's all
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