Yamaha V9938 Programmer's Manual page 43

3.5.1. Screen map and pattern tables
Unlike in other modes, in this mode screen is divided vertically into three logical parts.
Every part has its own pattern generator and pattern color tables, but all of them share the
same pattern layout table, one after another. Screen map is provided below.
0
0 0, 0
1 0, 1
...
...
0, 7
0, 8
...
...
...
0, 15
0, 16
...
...
22 0, 22
23 0, 23
↑
Y
(base address) 00000h
© 1985 ASCII CORP. / NIPPON GAKKI CO.
1 2
1, 0 2, 0
1, 1 2, 1
... ...
... ...
1, 7 2, 7
1, 8 2, 8
... ...
... ...
... ...
1, 15 2, 15
1, 16 2, 16
... ...
... ...
1, 22 2, 22
1, 23 2, 23
Pattern generator table
Pattern images for upper
⅓ of the screen
007FFh
00800h Pattern images for middle
⅓ of the screen
00FFFh
01000h Pattern images for lower
⅓ of the screen
017FFh
Columns
3
3, 0 ...
3, 1 ...
... ...
... ...
... ...
... ...
... ...
... ...
... ...
... ...
... ...
... ...
... ...
... ...
... ...
(256)
(256)
(256)
Page 43 of 108
31
... 31, 0
... 31, 1
... ...
... ...
... 31, 7
... 31, 8
... ...
... ...
... ...
... 31, 15
... 31, 16
... ...
... ...
... 31, 22
... 31, 23
Pattern color table
Pattern colors for upper
⅓ of the screen (256)
Pattern colors for middle
⅓ of the screen (256)
Pattern colors for lower ⅓
of the screen (256)
© 2010-2015 Eugeny Brychkov
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