F65510

Manufacturer Part NumberF65510
DescriptionControllers, Flat Panel VGA Controller
ManufacturerIntel Corporation
F65510 datasheet
 


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Page 41/154:

CGA / Hercules Registers

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Register
Mnemonic
Register Name
MODE
CGA/Hercules Mode
COLOR
CGA Color Select
HCFG
Hercules Configuration
CGA / HERCULES MODE CONTROL
REGISTER (MODE)
Read/Write at I/O Address 3B8h/3D8h
D7 D6 D5 D4 D3 D2 D1 D0
Hi-Res Text
Graphics Mode
Monochrome
Video Enable
Hi-Res Graphics (CGA only)
Text Blink Enable
Reserved
Page Select
This register is effective only in CGA and Hercules
modes.
It is accessible if CGA or Hercules
emulation mode is selected or the extension registers
are enabled. If the extension registers are enabled,
the address is determined by the address select in the
Miscellaneous Outputs register.
address is determined by the emulation mode. It is
cleared by RESET.
0
CGA 80/40 Column Text Mode
0 Select 40 column CGA text mode
1 Select 80 column CGA text mode
1
CGA/Hercules Graphics/Text Mode
0 Select text mode
1 Select graphics mode
Revision 0.7

CGA / Hercules Registers

Index
Access
RW
RW
RW
2
3
(CGA only)
4
(0=Text)
(CGA only)
5
(Herc only)
6
7
Otherwise the
37

CGA / Hercules Registers

I/O
Protect
Address
Group
3D8h
3D9h
3BFh
CGA Mono/Color Mode
0 Select CGA color mode
1 Select CGA monochrome mode
CGA/Hercules Video Enable
0 Blank the screen
1 Enable video output
CGA High Resolution Mode
0 Select 320x200 graphics mode
1 Select 640x200 graphics mode
CGA/Hercules Text Blink Enable
0 Disable character blink attribute (blink
attribute bit-7 used to control back-
ground intensity)
1 Enable character blink attribute
Reserved (0)
Hercules Page Select
0 Select the lower part of memory
(starting address B0000h) in Hercules
Graphics Mode
1 Select the upper part of the memory
(starting address B8000h) in Hercules
Graphics Mode
Preliminary 65510
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