IBM 5150

IBM Monochrome Display and Parallel
Printer
Adapter ................................. 2-37
Parallel Interface Description
IBM Monochrome Direct Drive Interface and
...................... 2-37
IBM Monochrome Display Adapter Block Diagram
... 2-38
System Channel Interface
.......................... 2-39
Lines Used
.................................... 2-39
Loads
......................................... 2-39
Special Timing
................................. 2-39
Data Rates .................................... 2-39
Interrupt and
DMA Response Requirements ....... 2-39
Modes
Of Operation .............................. 2-40
Programming Considerations
....................... 2-41
Programming the 6845
CRT Controller ........... 2-41
Sequence
of Events ............................. 2-41
Memory Requirements
.......................... 2-41
DMA Channel ................................. 2-42
Interrupt Levels
................................ 2-42
I/O Address and Bit Map ....................... 2-42
IBM Monochrome Display
........................ 2-43
Operating Characteristics
........................ 2-43
Pin Assignment
................................. 2-44
Color/Graphics Monitor Adapter ................. 2-45
Color/Graphics Monitor Adapter Block Diagram
..... 2-47
Major Components Definitions
..................... 2-48
Motorola 6845 CRT Controller
.................. 2-48
Mode Set and Status Registers
................... 2-48
Display Buffer
................................. 2-48
Character Generator
............................ 2-48
Timing Generator
.............................. 2-48
Composite Color Generator.
..................... 2-48
Modes of Operation
............................... 2-49
Alphanumeric Mode
............................ 2-49
Color TV
...................................... 2-49
Color Monitor
................................. 2-50
IBM Monochrome Display Adapter V
s. Color/Graphics .. .
Adapter Attribute Relationship
..................... 2-51
Color/Graphics Modes
............................ 2-51
Graphics Storage Map
.......................... 2-52
Description of Basic Operations
.................. 2-54
Summary
of Available Colors .................... 2-55
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