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V9938
Yamaha V9938 Manuals
Manuals and User Guides for Yamaha V9938. We have
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Yamaha V9938 manual available for free PDF download: Programmer's Manual
Yamaha V9938 Programmer's Manual (108 pages)
MSX-VIDEO
Brand:
Yamaha
| Category:
Control Unit
| Size: 2.05 MB
Table of Contents
Screen Modes 2
5
Table of Contents
7
Definitions
9
1 Basic Input and Output
13
Accessing the Control Registers
13
Direct Access to VDP Registers
13
Indirect Access to Registers through R#17 (Control Register Pointer)
13
Accessing the Palette Registers
14
Accessing the Status Registers
14
Accessing the Video RAM
14
2 Register Functions
17
Control Registers
17
Mode Registers
17
Table Base Address Registers
18
Color Registers
19
Display Registers
20
Access Registers
21
Command Registers
22
Status Registers #0 to #9
23
3 Screen Modes
25
TEXT1 Mode
25
TEXT2 Mode
29
MULTICOLOR (MC) Mode
34
GRAPHIC1 (G1) Mode
38
GRAPHIC2 (G2) and GRAPHIC3 (G3) Modes
42
GRAPHIC4 (G4) Mode
47
GRAPHIC5 (G5) Mode
50
GRAPHIC6 (G6) Mode
55
GRAPHIC7 (G7) Mode
59
4 Commands
63
Types of Commands
63
Page Concept
64
Logical Operations
65
Explanations of Commands
66
HMMC (High-Speed Move CPU to VRAM)
66
YMMM (High Speed Move VRAM to VRAM, y Only)
69
HMMM (High Speed Move VRAM to VRAM)
71
HMMV (High-Speed Move VDP to VRAM)
73
LMMC (Logical Move CPU to VRAM)
75
LMCM (Logical Move VRAM to CPU)
78
LMMM (Logical Move VRAM to VRAM)
81
LMMV (Logical Move VDP to VRAM)
83
Line
85
Srch
87
Pset
90
Point
92
Speeding up the Processing of Commands
93
States of the Registers after Command Execution
94
5 Sprites
95
Sprite Mode 1 (G1, G2, MC)
96
Sprite Mode 2 (G3, G4, G5, G6, G7)
100
Special Rules for Sprite Color Settings
107
6 Special Functions
108
Alternate Display of Two Graphics Screen
108
Displaying Two Graphics Screens at 60Hz
108
Interlace Display
108
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