M69030 Asiliant Technologies, M69030 Datasheet - Page 103

• Manufacturer Part Number: M69030
• Manufacturer: Asiliant Technologies

Specifications of M69030

• Operating Temperature (min): 0C
• Operating Temperature Classification: Commercial
• Operating Temperature (max): 70C
• Rad Hardened: No
• Lead Free Status / Rohs Status: Supplier Unconfirmed

Chapter 9
CRT Controller Registers
Introduction
The CRT controller registers are accessed by writing the index of the desired register into the CRT
Controller Index Register at I/O address 3B4h or 3D4h (depending upon whether the graphics system is
configured for MDA or CGA emulation), and then accessing the desired register through the data port for
the CRT controller registers located at I/O address 3B5h or 3D5h (again depending upon the choice of MDA
or CGA emulation)
`efmp

Name
CR00
CR01
CR02
CR03
CR04
CR05
CR06
CR07
CR08
CR09
CR0A
CR0B
CR0C
CR0D
CR0E
CR0F
CR10
CR11
CR12
CR13
CR14
CR15
CR16
CR17
CR18
CR22
CR30
CR31
CR32
CR33
CR38
CR3C
CR40
CR41
CR70
CR71
CR72
CR73
CR74
CR75
CR76
CR77
CR78
CR79
69030 Databook
Horizontal Total Register
Horizontal Display Enable End Register
Horizontal Blanking Start Register
Horizontal Blanking End Register
Horizontal Sync Start Register
Horizontal Sync End Register
Vertical Total Register
Overflow Register
Preset Row Scan Register
Maximum Scanline Register
Text Cursor Start Scanline Register
Text Cursor End Scanline Register
Start Address High Register
Start Address Low Register
Text Cursor Location High Register
Text Cursor Location Low Register
Vertical Sync Start Register
Vertical Sync End Register
Vertical Display Enable End Register
Offset Register
Underline Row Register
Vertical Blanking Start Register
Vertical Blanking End Register
CRT Mode Control Register
Line Compare Register
Memory Read Latch Data Register
Extended Vertical Total Register
Extended Vertical Display End Register
Extended Vertical Sync Start Register
Extended Vertical Blanking Start Register
Extended Horizontal Total Register
Extended Horizontal Blanking End Register
Extended Start Address Register
Extended Span Register (shadowed)
Interlace Control Register
NTSC/PAL Video Output Control Register
NTSC/PAL Horizontal Serration 1 Start Register
NTSC/PAL Horizontal Serration 2 Start Register
NTSC/PAL Horizontal Pulse Width Register
NTSC/PAL Filtering Burst Read Length Register
NTSC/PAL Filtering Burst Read Quantity Register
NTSC/PAL Filtering Control Register
NTSC/PAL Vertical Reduction Register
NTSC/PAL Pixel Resolution Fine Adjust Register
Register Function
CRT Controller Registers
read/write
read/write
read/write
read/write
read/write
read/write
read/write
read/write
read/write
read/write
read/write
read/write
read/write
read/write
read/write
read/write
read/write
read/write
read/write
read/write
read/write
read/write
read/write
read/write
read/write
read/write
read/write
read/write
read/write
read/write
read/write
read/write
read/write
read/write
read/write
read/write
read/write
read/write
read/write
read/write
read/write
read/write
read/write
read-only
3B5/3D5
Access
Revision 1.3 11/24/99
3B4/3D4 (CRX)
Index Value
0Ch
0Dh
3Ch
0Ah
0Bh
0Eh
0Fh
00h
01h
02h
03h
04h
05h
06h
07h
08h
09h
10h
11h
12h
13h
14h
15h
16h
17h
18h
22h
30h
31h
32h
33h
38h
40h
41h
70h
71h
72h
73h
74h
75h
76h
77h
78h
79h
9-1